The URL can be used to link to this page

Home My WebLink About2 Flood Hazard Analysis-09-24-19N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Flood Hazard- Cover.docx NORTHWEST CROSSING SUBDIVISION FLOOD HAZARD ANALYSIS FOR BAXTER CREEK & BAXTER DITCH BOZEMAN, MONTANA SEPTEMBER, 2019 PREPARED BY: Morrison-Maierle, Inc. 2880 Technology Boulevard West Bozeman, MT 59771 N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx TABLE OF CONTENTS 1 FLOOD HAZARD ANALYSIS 2 FLOOD HAZARD EXHIBIT 3 APPENDICIES 3.1 HYDROLOGY CALCULATIONS 3.2 BAXTER CREEK CROSS SECTIONS 3.3 BAXTER DTICH CROSS SECTIONS 3.4 ALLIED ENGINEERING- LAUREL GLEN FLOOD HAZARD ASSESMENT- 2002 3.5 VALLEY WEST SUBDIVISION- PUD DRAINAGE PLAN Page 1 of 2 1.1 INTRODUCTION This report provides an analysis of the flood hazard for the proposed Northwest Crossing Subdivision. The 160 acre development has two waterways that run south to north through the property. Baxter Creek runs along the western boundary. Baxter Ditch runs through the center of the property. Both water ways are classified as stream/ditch as they are fed by natural drainage and irrigation. Both are bordered by wetland plants and meander through cultivated pasture. Two previous studies were used to help develop flowrates for these stretches. First, Morrison-Maierle analyzed both waterways in the Drainage Plan provided in the Valley West PUD application in 2001 (See Appendix 3.5) Second, Allied Engineering submitted two reports for the Laurel Glen subdivision in 2002 ( See Appendix 3.4- Flood Hazard Assessment-Baxter Creek and Phase 1 Storm Water Facilities Design Report). 1.2 METHOD Morrison-Maierle surveyed the 160 acre property, including the water ways with GPS survey equiptment. Cross sections were developed approximately every 100 ft along each water way in AutoCAD. Bentley Flowmaster V8i was used to analyze each cross section to determine the water surface elevation for the given flow rate. The water surface elevation was then mapped in AutoCAD to show the extents of flooding in the current condition and areas that will require grading to contain flood waters. 1.3 HYDROLOGY: BAXTER CREEK The 2002 report from Allied identifies the 100-year flowrate of Baxter Creek at Durston Road to be 169 cfs. This includes potential overflow from Farmers Canal south of Huffine Lane. Approximately 90 acres of residential land in Laurel Glen will contribute to Baxter Creek between Durston Road and W. Oak St., the south boundary of Northwest Crossing. The 100- year runoff rate for this area is estimated to be 31 cfs. It is likely that the peak flow from Laurel Glen runoff would pass through the study area in this report long before the peak of 169 cfs originating south of Huffine Road and overflow from Famers Canal, but it is conservative to add the two together. For this report, cross sections of Baxter Creek were analyzed with a 100-year flowrate of 200 cfs. Currently, there is head gate at approximately station 15+00 that diverts water to a channel that runs to the west of the main channel. This side channel is proposed to be removed as it runs into the proposed Laurel Parkway right-of-way. For this analysis, we conservatively assumed all flow will go through the main channel. 1.4 HYDROLOGY: BAXTER DITCH The 1999 Drainage Plan for Valley West prepared by Morrison-Maierle identified the 100-year flowrate of Baxter Ditch at Durston Road to be 74.8 cfs. About 120 acres of residential land between Durston and Oak will runoff into Baxter Ditch before reaching the proposed Northwest Crossing area. This additional runoff is estimated to be 45 cfs, see calculations in Appendix 3.1. For this study, cross sections of Baxter Creek were analyzed with a 100-year flowrate of 120 cfs. A roughness coefficient of 0.050 was used for all cross sections. 1.5 RECOMMENDATIONS: BAXTER CREEK. Our analysis shows that all flood waters will be contained within the existing banks of Baxter Creek. We recommend all structures in the vicinity of the creek maintain a minimum floor elevation at least two feet above the identified flood water surface elevation. Page 2 of 2 1.6 RECOMMENDATIONS: BAXTER DITCH The majority of the flood water will be contained within the existing banks of the waterways. Exhibit 1- “Baxter Creek and Baxter Ditch Cross Sections and Flood Extents” identifies a few areas where flooding will overtop the banks and flow out beyond the 50’ wetland setback. In these cases, we recommend filling areas along the outer 20’ of the wetland setback. This may be accomplished with a stabilized and landscaped berm or trail that will run the length of the creek within the open space. In cases that the open spaces is adjacent to proposed right-of- way, set grades at the back of the sidewalk to be at least one foot above the projected flood water surface elevations. Additionally, we recommend all structures in the vicinity of the ditch maintain a minimum floor elevation at least two feet above the identified flood water surface elevation. DYH DYH D YH DYH I S S S S S S S M W M W M W M W S S S S S TP TP TP TPTP TP T WV WV W V WV W V WV WV WV WV WV WV WV WV WV WV WV WV WV WV WV W V WV W V WV WV E S E W E S 0 + 4 4 1+7 03+ 0 0 4+2 3 5+0 0 6+00 7 + 0 0 8+0 0 9+ 0 0 1 0 + 0 0 11+ 0 0 12+ 0 0 13+ 1 7 14 + 0 0 15 + 0 7 16 + 3 4 17 + 2 1 18 + 4 1 20 + 5 2 21+00 21 + 9 4 23 + 0 0 24 + 0 0 2 4 + 7 7 27 + 2 9 29 + 0 4 29 + 0 4 30 + 0 0 30 + 0 0 31 + 0 0 31 + 0 0 31+ 7 8 31+ 7 8 33+ 3 0 33+ 3 0 34 + 0 8 34 + 0 8 34 + 9 5 34 + 9 5 36 + 0 0 36 + 0 0 1 + 0 0 2+ 0 0 3+ 1 2 5+ 0 0 6+ 0 1 8+00 9+ 3 1 10 + 5 0 11 + 2 4 13 + 0 0 14 + 7 7 16+ 0 0 17 + 0 0 18 + 0 0 19 + 0 0 20 + 0 0 2 1 + 0 0 2 2 + 0 0 2 3 + 0 0 2 4 + 0 0 25 + 0 0 26 + 0 0 27 + 0 0 28 + 0 0 29 + 0 0 30+0 0 31 + 1 1 32+00 33+00 33 + 5 7 34 + 7 5 473 5 4 7 3 0 472 5 47 2 0 4715 47 1 0 47 1 0 4 7 1 5 4 7 2 0 472 5 47 3 0 47 3 5 47 4 0 35 + 6 6 0 + 0 0 1 + 0 0 2+ 0 0 3+ 0 0 4+ 0 0 5+ 0 0 6+ 0 0 7+00 8+00 9 + 0 0 10+00 11 + 0 0 12+00 13 + 0 0 14+00 15 + 0 0 16 + 0 0 17 + 0 0 18 + 0 0 19 + 0 0 20 + 0 0 2 1 + 0 0 2 2 + 0 0 2 3 + 0 0 2 4 + 0 0 25 + 0 0 26 + 0 0 27 + 0 0 28 + 0 0 29 + 0 0 30+ 0 0 31 + 0 0 32+00 33+00 34 + 0 0 35 + 0 0 0+ 0 0 1+0 0 2+0 0 3+ 0 0 4+00 5+0 0 6+00 7 + 0 0 8+0 0 9+ 0 0 1 0 + 0 0 11+ 0 0 12 + 0 0 13+00 14 + 0 0 15+0 0 16+ 0 0 17+00 1 8 + 0 0 19+00 20+ 0 0 21+00 2 2 + 0 0 23 + 0 0 24 + 0 0 25+00 2 6 + 0 0 27+ 0 0 28+0 0 29+ 0 0 30 + 0 0 31+ 0 0 32+0 0 33+00 34 + 0 0 35+ 0 0 36 + 0 0 36+ 6 0 FIGURE NUMBER © PROJECT NO.DRAWN BY: DSGN. BY: APPR. BY: DATE: COPYRIGHT MORRISON-MAIERLE, INC.,2019 N:\5659\005 NWX Phase 1 Major Sub\ACAD\Civil\Flood Hazard Analysis\Flood Hazard Exhibit.dwg Plotted by cooper krause on Sep/10/2019 engineers surveyors planners scientists MorrisonMaierle 2880 Technology Blvd West Bozeman, MT 59718 406.587.0721 www.m-m.net 5659.005 EX.1 NORTHWEST CROSSING FLOOD HAZARD ANALYSISBOZEMAN MONTANA BAXTER CREEK AND BAXTER DITCH CROSS SECTIONS AND FLOOD EXTENTS CPK CPK MEE 08/2019 100 200501000 SCALE IN FEET PROPOSED RIGHT OF WAY LEGEND PROPOSED OPEN SPACE PROPOSED LOTS BAXTER D T I C H BAXTER C R E E K B A X T E R L A N E LAUREL PARKWAY W . O A K S T . RECOMMENDED FILL AREAS 100-YEAR FLOOD EXTENTS 4714.4 4714.0 4713.6 47 1 2 . 6 4714.4 RECOMMENDED MIN. FILL ELEVATION AT BACK OF LOT 4736.0 4713.0 50' WETLAND SETBACK (TYP.) N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx APPENDIX 3.1 HYDROLOGY CALCULATIONS Rational Method For Runoff Calculations Baxter Creek- Laurel Glen Area Between Durston Road and Oak Street Design Storm Frequency = 100 Years C= 0.35 Low to medium density residentialCf =1.25 L= 2600 S= 0.75 Tc =69.5 min C= 0.35 i= 1.0 in/hr from C.O.B. Fig. I-2 A= 90 acres Q= 31.5 cfs Baxter Ditch- Area Between Durston Road and Oak Street Design Storm Frequency = 100 Years C= 0.375 Cf =1.25 L= 2800 S= 0.75 Tc =72 min C= 0.375 i= 1.0 in/hr from C.O.B. Fig. I-2 A= 120 acres Q= 45 cfs ܶ௖ ൌ 1.87 1.1 െ ܥ · ܥ௙ ܮଵ/ଶ ܵଵ/ଷ ܳ௣ ൌܥᇱ݅ܣ ܶ௖ ൌ 1.87 1.1 െ ܥ · ܥ௙ ܮଵ/ଶ ܵଵ/ଷ ܳ௣ ൌܥᇱ݅ܣ N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx APPENDIX 3.2 BAXTER CREEK CROSS SECTIONS Station Channel Slope (ft/ft) Roughness Coefficient Water Surface Elevation (ft) Flow Area (ft²) Wetted Perimeter (ft) Hydraulic Radius (ft) Top Width (ft) Normal Depth (ft) Critical Depth (ft) Critical Slope (ft/ft) Velocity (ft/s) Velocity Head (ft) Specific Energy (ft) Froude Number 0+44 0.0104 0.050 4733.36 56.82 45.39 1.25 44.93 2.17 1.63 0.03709 3.52 0.19 2.36 0.55 1+70 0.0104 0.050 4732.24 95.38 165.73 0.58 165.28 3.05 2.23 0.03574 2.1 0.07 3.12 0.49 3+00 0.0104 0.050 4730.67 70.03 76.54 0.91 76.14 2.23 1.74 0.03926 2.86 0.13 2.36 0.52 4+23 0.0104 0.050 4729.81 56.57 44.9 1.26 44.16 3.24 2.49 0.03501 3.54 0.19 3.43 0.55 5+00 0.0066 0.050 4728.5 95.24 117.41 0.81 116.57 2.42 2.01 0.04659 2.1 0.07 2.49 0.41 6+00 0.0066 0.050 4728.42 85.58 89.88 0.95 89.3 2.47 1.85 0.04021 2.34 0.08 2.56 0.42 7+00 0.0066 0.050 4727.43 71.16 56.64 1.26 55.74 2.79 2.02 0.03756 2.81 0.12 2.92 0.44 8+00 0.0066 0.050 4726.87 64.41 44.17 1.46 43.6 2.66 1.83 0.03598 3.1 0.15 2.81 0.45 9+00 0.0066 0.050 4725.94 75.95 66.68 1.14 65.87 2.49 1.76 0.03852 2.63 0.11 2.6 0.43 10+00 0.0066 0.050 4725.21 87.55 95.13 0.92 94.65 2.4 1.48 0.03743 2.28 0.08 2.48 0.42 11+00 0.0098 0.050 4724.27 63.14 56.51 1.12 55.95 2.31 1.77 0.03831 3.17 0.16 2.46 0.53 12+00 0.0098 0.050 4723.08 92.64 147.38 0.63 146.94 1.83 1.56 0.04893 2.16 0.07 1.9 0.48 13+17 0.0098 0.050 4721.95 58.64 46.99 1.25 46.4 2.44 1.89 0.03753 3.41 0.18 2.62 0.53 14+00 0.0098 0.050 4721.48 63.78 57.96 1.1 57.06 2.45 1.92 0.03888 3.14 0.15 2.6 0.52 15+07 0.0036 0.050 4720.96 103.45 91.64 1.13 90.07 2.16 1.36 0.04125 1.93 0.06 2.22 0.32 16+34 0.0036 0.050 4720.51 123.73 143.37 0.86 143.11 2.22 1.54 0.04426 1.62 0.04 2.26 0.31 17+21 0.0113 0.050 4719.15 71.92 87.1 0.83 86.93 1.71 1.34 0.04193 2.78 0.12 1.83 0.54 18+41 0.0047 0.050 4718.52 104.13 113.81 0.91 113.02 2.94 1.98 0.03717 1.92 0.06 3 0.35 20+52 0.0047 0.050 4717.31 113.02 139.64 0.81 139.23 1.87 1.3 0.04479 1.77 0.05 1.92 0.35 21+00 0.0047 0.050 4716.86 111.77 135.8 0.82 135.57 1.46 1 0.04776 1.79 0.05 1.51 0.35 21+94 0.0047 0.050 4715.81 88.12 74.95 1.18 74.73 1.95 1.27 0.04125 2.27 0.08 2.03 0.37 23+00 0.0047 0.050 4715.64 105.43 117.34 0.9 116.94 2.03 1.45 0.04403 1.9 0.06 2.09 0.35 24+00 0.0062 0.050 4714.47 88.55 93.41 0.95 93.18 1.63 1.15 0.04401 2.26 0.08 1.71 0.41 24+77 0.0062 0.050 4714.02 99.42 124.77 0.8 124.51 1.87 1.43 0.04563 2.01 0.06 1.93 0.4 26+25 0.0062 0.050 4713.46 81.34 75.55 1.08 74.81 2.32 1.66 0.04047 2.46 0.09 2.42 0.42 27+29 0.0106 0.050 4712.48 59.85 52.45 1.14 52.25 2.29 1.8 0.0379 3.34 0.17 2.46 0.55 29+04 0.0106 0.050 4710.91 67.27 70.24 0.96 69.42 2.87 2.36 0.03911 2.97 0.14 3.01 0.53 30+00 0.0106 0.050 4709.3 61.77 56.75 1.09 56.49 1.81 1.38 0.03938 3.24 0.16 1.97 0.55 31+00 0.0106 0.050 4707.57 90.7 148.13 0.61 147.93 1.1 0.85 0.04925 2.21 0.08 1.17 0.5 33+30 0.0106 0.050 4706.27 68.49 73.45 0.93 73.04 2.24 1.86 0.0417 2.92 0.13 2.37 0.53 34+08 0.0106 0.050 4705.59 69.7 76.76 0.91 76.39 2.58 2.09 0.03867 2.87 0.13 2.71 0.53 34+95 0.0106 0.050 4704.6 62.94 59.47 1.06 58.56 2.73 2.23 0.03918 3.18 0.16 2.88 0.54 36+00 0.0106 0.050 4704.21 72.87 85.8 0.85 84.63 2.7 2.38 0.04451 2.74 0.12 2.82 0.52 Baxter Creek Cross Sections N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx APPENDIX 3.3 BAXTER DITCH CROSS SECTIONS Station Channel Slope (ft/ft) Rougness Coefficient Water Surface Elevation (ft) Flow Area (ft²) Wetted Perimeter (ft) Hydraulic Radius (ft) Top Width (ft) Normal Depth (ft) Critical Depth (ft) Critical Slope (ft/ft) Velocity (ft/s) Velocity Head (ft) Specific Energy (ft) Froude Number 1+00 0.005 0.05 4736.91 90.79 188.79 0.48 188.62 1.19 0.83 0.0487 1.32 0.03 1.21 0.34 2+00 0.005 0.05 4735.97 89.88 177.41 0.51 177.33 1.36 1 0.0521 1.34 0.03 1.39 0.33 3+12 0.0092 0.05 4735.11 76.69 188.59 0.41 187.84 1.93 1.74 0.0581 1.56 0.04 1.97 0.43 5+00 0.0092 0.05 4734.06 54.18 79.08 0.69 78.82 1.93 1.53 0.0447 2.22 0.08 2 0.47 6+01 0.0092 0.05 4733.14 77.06 190.82 0.4 190.48 2.1 1.73 0.0466 1.56 0.04 2.14 0.43 8+00 0.005 0.05 4732.9 76.92 120.27 0.64 119.53 2.85 2.15 0.0426 1.56 0.04 2.89 0.34 9+31 0.005 0.05 4731.59 80.92 136.6 0.59 135.59 2.44 2.02 0.0501 1.48 0.03 2.47 0.34 10+50 0.005 0.05 4731.15 80.36 134.2 0.6 133.61 2.44 1.98 0.0488 1.49 0.03 2.48 0.34 11+24 0.005 0.05 4730.8 67.2 85.83 0.78 85.22 2.51 1.96 0.0457 1.79 0.05 2.56 0.35 13+00 0.005 0.05 4729.7 69.84 94.46 0.74 93.89 2.75 2.13 0.0438 1.72 0.05 2.79 0.35 14+77 0.0092 0.05 4727.27 57.77 92.86 0.62 92.41 1.76 1.31 0.0442 2.08 0.07 1.83 0.46 16+00 0.0092 0.05 4726.72 66.93 134.13 0.5 133.73 2.22 1.79 0.0446 1.79 0.05 2.27 0.45 17+00 0.0092 0.05 4725.54 58.48 95.76 0.61 95.23 2.08 1.78 0.0489 2.05 0.07 2.14 0.46 18+00 0.0084 0.05 4724.6 67.36 127.41 0.53 126.84 2.22 1.91 0.0502 1.78 0.05 2.27 0.43 19+00 0.0084 0.05 4723.4 74.78 165.37 0.45 164.81 1.99 1.68 0.0501 1.6 0.04 2.03 0.42 20+00 0.0084 0.05 4722.14 57.38 85.27 0.67 84.71 2.02 1.69 0.0483 2.09 0.07 2.09 0.45 21+00 0.0084 0.05 4721.01 69.88 139.59 0.5 138.81 2.22 1.88 0.0488 1.72 0.05 2.26 0.43 22+00 0.0084 0.05 4719.81 63.28 108.96 0.58 108.53 2.11 1.76 0.0481 1.9 0.06 2.17 0.44 23+00 0.0247 0.05 4718.43 40.76 81.41 0.5 80.95 1.48 1.37 0.0485 2.94 0.13 1.61 0.73 24+00 0.027 0.05 4717.53 50.88 151.66 0.34 151.22 1.86 1.76 0.0538 2.36 0.09 1.94 0.72 25+00 0.005 0.05 4716.15 81.09 137.24 0.59 136.46 2.56 2.15 0.0513 1.48 0.03 2.59 0.34 26+00 0.005 0.05 4715.18 78.98 128.42 0.61 127.56 2.33 1.85 0.0482 1.52 0.04 2.37 0.34 27+00 0.005 0.05 4714.35 82.17 141.83 0.58 141.14 2.07 1.71 0.0526 1.46 0.03 2.1 0.34 28+00 0.005 0.05 4713.87 101.88 242.81 0.42 242.06 1.98 1.64 0.0559 1.18 0.02 2 0.32 29+00 0.005 0.05 4713.75 104.52 258.56 0.4 258.08 2.6 1.93 0.0438 1.15 0.02 2.62 0.32 30+00 0.005 0.05 4712.84 79.52 130.67 0.61 130.05 2.63 2.26 0.0523 1.51 0.04 2.67 0.34 31+11 0.005 0.05 4711.04 74.59 111.38 0.67 110.95 1.54 1.07 0.0479 1.61 0.04 1.58 0.35 32+00 0.005 0.05 4710.66 75.17 113.54 0.66 113.28 1.31 0.91 0.0505 1.6 0.04 1.35 0.35 33+00 0.005 0.05 4710.74 86.49 161.3 0.54 160.95 1.84 1.38 0.0498 1.39 0.03 1.87 0.33 33+57 0.0047 0.05 4710.64 87.98 160.6 0.55 160.31 1.69 1.2 0.0500 1.36 0.03 1.72 0.32 34+75 0.0047 0.05 4710.01 78.91 122.3 0.65 122.02 1.71 1.24 0.0482 1.52 0.04 1.74 0.33 Baxter Ditch Cross Sections N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx APPENDIX 3.4 ALLIED ENGINEERING- LAUREL GLEN FLOOD HAZARD ASSESMENT- 2002 n n . ^ s e e s / ' s s s s . 0 E N G I N E E R I N G S E R V I C E S . I M C . F e b r u a r y 4 , 2 0 0 2 B o b M u r r a y , P r o j e c t E n g i n e e r C i t y o f B o z e m a n E n g i n e e r i n g D e p a r t m e n t P O B o x 1 2 3 0 B o z e m a n , M T 5 9 7 7 1 R E : L a u r e l G l e n S u b d i v i s i o n F l o o d H a z a r d A s s e s s m e n t - B a x t e r C r e e k D e a r B o b : T h i s l e t t e r p r o v i d e s o u r a s s e s s m e n t o f t h e f l o o d h a z a r d f o r B a x t e r C r e e k i n t h e p r o p o s e d L a u r e l G l e n D e v e l o p m e n t . T h e p r o p o s e d d e v e l o p m e n t i s a 1 5 6 . 9 6 - a c r e s i t e l o c a t e d o n t h e n o r t h s i d e o f D u r s t o n R o a d a p p r o x i m a t e l y 1 3 0 0 f e e t w e s t o f t h e i n t e r s e c t i o n o f D u r s t o n R o a d a n d C o t t o n w o o d R o a d . T h e p r o p o s e d r e s i d e n t i a l a n d c o m m e r c i a l s u b d i v i s i o n w i l l b e c o n s t r u c t e d i n f o u r p h a s e s . T h e p r o p o s e d d e v e l o p m e n t w i l l c o n s i s t o f a v a r i e t y o f b u i l d a b l e l o t s f o r s i n g l e a n d m u l t i - f a m i l y u s e . T h e c o m m e r c i a l a r e a i s p r o p o s e d f o r N e i g h b o r h o o d S e r v i c e a r e a B l z o n i n g . T h e p r o p o s e d s u b d i v i s i o n w i l l a l s o i n c o r p o r a t e o p e n s p a c e s a n d p a r k a r e a s . P l e a s e r e f e r t o t h e F i g u r e O n e z o n e m a p f o r l o t l o c a t i o n s a n d a r e a b r e a k d o w n p e r z o n i n g c l a s s i f i c a t i o n . F i e l d W o r k A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . s u r v e y e d c r o s s - s e c t i o n s o f t h e c r e e k s i n S e p t e m b e r , O c t o b e r a n d N o v e m b e r o f 2 0 0 1 u s i n g s u r v e y g r a d e G l o b a l P o s i t i o n i n g S y s t e m ( G P S ) e q u i p m e n t . F i g u r e T w o s h o w s t h e l o c a t i o n o f t h e s e s e c t i o n s . A d d i t i o n a l l y , t h e c u l v e r t c o n v e y i n g B a x t e r C r e e k a c r o s s H u f f i n e L a n e w a s s u r v e y e d . C i t y o f B o z e m a n B M # 7 1 7 , t h e n o r t h w e s t b o n n e t b o l t o n f i r e h y d r a n t , ( e l e v a t i o n 4 7 9 3 . 1 8 ) l o c a t e d n o r t h e a s t o f t h e i n t e r s e c t i o n o f W e s t B a b c o c k a n d N o r t h F e r g u s o n i s t h e e l e v a t i o n b e n c h m a r k f o r t h e p r o j e c t . H y d r o l o g y T h e h i s t o r i c a l d r a i n a g e b a s i n f o r B a x t e r C r e e k i s s h o w n o v e r l a i d u p o n a U n i t e d S t a t e s G e o l o g i c a l S u r v e y ( U S G S ) t o p o g r a p h i c m a p i n F i g u r e T h r e e . T h e h i s t o r i c a l d r a i n a g e a r e a f o r B a x t e r C r e e k i s a p p r o x i m a t e l y 2 . 0 m i 2 u p s t r e a m o f t h e p r o j e c t s i t e . D r a i n a g e p a t t e r n s f o r t h e B a x t e r C r e e k b a s i n a r e c o m p l e x a n d h i g h l y m o d i f i e d f r o m n a t u r a l c o n d i t i o n s . 3 2 D i s c o v e r y D r i v e • » B o z e m a j i , M T 5 9 7 1 8 * ( 4 0 6 ) 5 8 2 - 0 2 2 1 * F a x ( 4 0 6 ) 5 8 2 - 5 7 7 0 cN0La u r e l G l e n Z o n e M a p C i t y o f B o z e m a n - 7 7 / a 7 B W E R , NWK SECTION 4VESTA FERN NELSONMARY CA THERINE ANOERSON(MARIE C. BAXTER LIFE ESTA TEjZONED ASFrF^SWy^WK SECTION 4RICHARD G. NOLLMEYER. TRUSTEEZONED AS^!!9si^ N E ' / S S E C T I O N 4 V E S T A F E R N N E L S O N M A R Y C A T H E R I N E A N O E R S O N f M A R I E C . B A X T E R L I F E E S T A T E ) Z O N E D A S I ' ' . j . ' j — w w ^ ; • - , , „ „ . „ - • — „ „ - , • : - i ; - i - V T B ' T - . N B S ' I S ' l t " E ( M ) I 2 6 5 7 . 2 1 ' ( M ) P R O P E R F r ' B O U N D A R Y O A K S T R E E T I f ^ K ^ l £!^VM%SM% SECTION 4RICHARD S. NOLLMEYER, TRUSTEEZONED AS ^ ^ I§TRACT 1.C.O.S. 1SS120.52AC.AijWD.FULTOHZONED AS ^ ^ • ^ ^ ^ ^ ^^.0 7 a s f , ^ ^ gE®..?^3a"!6;!viZONE-i.-Ra^ m R i m -^ r m ISANNIESTREET ^ • A ^ <a^%•V^0m ^ 0 ^ i - p as% ^ ^ -p ^ s ^ ^ / / / ^-0^» ' I ^ - y m l i ^7T4'4:4'^EJM} __DURST O N R O A D TRACT 1, C.O.S. 100 5 B 41J9AC.360 RANCH CORP . T R A C T 2 A , C . O . S . 1 0 0 S C 2 3 . W A C . B U R N T L E A T H E R R A N C H , I N C td 2 0 0 1 \ \ A - i . _ - _ ? i i t - 7 ^ - ; t ' t 7 8 8 A - B A B C O C K F K W . ^ < r . _ ^ Z - - \ N U F F N E . « a » _ ^ • s ' ~ ^ s ? r ~ ' " I T . . J - ™ , X ; ^ j . - ^ - ^ L J i . N ^ ? r o ' H n - ~ - 1 ; ' ; . . i . S l ! : L - ^ - ^ i ! 3 L ! . y r j R i ] " C T : i I f f l • r ~ h 7 . " " ' 1 1 [ " r ~ ® ^ L s r l 7 " - " j ? i ^ ' i [ j M \ f i ^ - r ^ ^ I I S . f 4 S 1 5 T ; i W ~ ^ ! ¥ ^ 1 ^ r - T ' r w i w ^ - ^ t f f • • - - h ' l . ' • J a " - § 5 ? T ! ~ = ' ~ ~ i - • ~ " ~ ^ ' y ' i ~ ^ ' i " L : ' - * ' ' \ M M v w ^ L T J - ' < ? X @ ^ - . ^ - ^ - — ^ . J ^ i • " " • y A 4 . J X j T " - T J T ' ? i ^ T I ! 1 \ V i c i n i t y M a p N O T T O S C A L E \ \ \ R E M A I N D E R E ' / S E ' / S S E C T I O N < P E S S Y H . M E T C A L F Z O N E D A S \ \ Z O N I N G S U M M A R Y Z O N E B 1 R 2 R 3 R 3 - A R 4 P A R K S A R E A 8 . 7 2 A c r e s 3 4 . 7 4 A c r e s 3 2 . 5 6 A c r e s 3 8 . 0 6 A c r e s 2 1 . 8 4 A c r e s 2 3 . 8 0 A c r e s T O T A L 1 5 9 . 7 2 A c r e s T R A C T 1 . C . O . S . 1 1 5 5 2 3 . 1 5 A C . W I L L I A M S P E G G Y H . M E T C M . F Z O N E D A S \ \ P R O P O S E D L A N D U S E L E G E N D R E S I D E N T I A L S I N G L E F A M I L Y . M E D I U M D E N S H Y D I S T R I C T R E S [ D E ^ m A L M E D I U M D E N S I T Y D I S T R I C T R E S I D E N T I A L T W O - F A M I L Y , M E D I U M D E N S m ' D I S T R I C T I R - 4 j R E S I D E N T I A L H I G H D E N S I T f D I S T R I C T B 1 I N E I G H B O R H O O D S E R V I C E D I S T R I C T f X f S I K [ F W R K L A N D O P E N S P A C E R I G H T - O F - W A Y / R O A D S : X T ' G 1 8 " S A N . S W R M A I N — B O Z E M A N C T I Y L B D T S — — M A M B R O N K E N M E M O R I A L P A R K T R A C T 3 A c . o . s . l o o s e S 7 . T O A C . 2 Q M E D P L / I i : > ' 7 ' G 1 2 " W A T E R M A I h ! ! I I ^ 1 i l S | t S ? ^ " S » a ^ s A L L I E D E N G I N E E R I N G s E F t v i c e s . I N C . C i v i l E n g i n e e r i n g L a n d S i u - v e y i n g G e o t e c t m i c a l E n g m e e r i n g S t r u c t u r a l E n g m e e r i n g 3 2 D I S C O V E R Y D R I V E B O Z E M A N . M T S 9 7 1 8 P H O N E ( 4 0 6 ) 5 8 2 - 0 2 2 1 F A X ( 4 0 6 ) 5 8 2 - 5 7 7 0 P R O J E C T t : 0 0 - 1 8 5 D A T E : 1 / 3 1 / 0 2 C o l o r E x h i b i t - 2 . d w g F I G U R E L A U R E L G L E N P R O P O S E D Z O N I N G r:%s n 2 0 0 L E G E N D X S L O C A T I O N 0 B R U S H C E N T E R L I N E O F B A X T E R C R E E K F ! 3 ^ i Z . C t . O O N 0 0 0 0 0 0 0 r ^ l 0 0 H c n w M r t ^ C O . M ^ : z iSS \ < ; ,00~DOt / 0 0 0 0 0 C s l r - - ) ^ - 0 ^ t - r ^ r o 0 U - ) ^ 0 0 0 0 ^ t - _ 0 H 0 0 H C M i n c n ^; ^ - 1 ^ 1 ^ H 0 m 0 ^ r ^ - ,<0 r / C R E E X s 1 [ ^ 0 Q i n ^ t £ ) ^ < ^ 0 0 ^ i n \ 0 i n z 00 0 00 0 r/~)0 ^ ^ r s l 0 c n U - ) 0 0 N ^ LU C D ^ 0^^ Q 0^ ? ^^ 1 . ^1- ? ? ^ i n 3 I LAUREIPARKWAY ? ^0.REVISIONSDRAVW BYDATC1002003000SCAl£: 1 INCH • 200 FEETPROJECT ENGINEER: PJSDESIGNED BY: PJS DRAWN BY: RFCREVIE»»ED BY: DSC, CSfl L A U R E L G L E N S U B D I V I S I O N B A X T E R C R E E K C R O S S S E C T I O N S B O Z E M A N , M O N T A N A ^ . : K ' / / ' s s s r r ^ . / s A L L I E D E N G I N E E R I N G S E R \ / I C E S . I N C C i v i l E n g i n e e r i n g L a n d S u r v e y i n g G e o t e c h n i c a l E n g i n e e r i n g S t r u c t u r a l E n g i n e e r i n g 3 2 D I S C O V E R Y D B J V E B O Z E M A N . M T 5 9 7 1 S P H O N E ( 4 0 6 ) 5 8 2 - 0 2 2 1 F A X ( 4 0 6 ) 5 8 2 - 5 7 7 0 P R O J E C T ( t 0 0 - 1 8 5 D A T E 1 2 / 2 9 / 0 1 F l o o d F i g Z d w g F I G U R E 2 L A U R E L G L E N S U B D I V I S I O N . B A X T E R C R E E K X - S E C T I O N S -^E2LSJZ3TI:^E':.ZZJ : ^ = . . - ^ ^ ^ ^ ^ ;.^.^^«,-—^. » , . - ^ ^ 1^ 7 '•%l::ii.:'-.'l':tN'"c°=as' .'i ! / ¥.1 \ I"~ ^ •'1^:..'\. I '.11' r7r~^--~~~~-"^^-Y;T=^'"E—:^^^$<^="-fc=T—=a i ; ' , ^"',.::..... ......--.^T^^Qi^? t ' = ' \ . ^^:;^J_^"-='r''r':- 7 ; j " \ m ^! 1 - S s n j j ; - 1 1 ?- - 4 - ^ z • } -I I . -I-i/ i ft^^^fcy?:hA..- /-!i — ^ ' ( -----+fc-^--^:rtI^^i^sK-.^ ' r ^ ^ ^ -\- \- :~r&^ :- ^^: ! ' -L^~"~^^—-^ t '^.1 1 •ri.--.—-,:..^.. ; ! / '!.. S i N I : i ' l-—^^""4£———, ; ii'"T7~~"yL..,....,...Ji::_3:.--...l_,..........-.,.--C^..^.,^;^^^^^-...,....._,............,.-..._.4...j,??i_-..llll:inT:z_ • • » - i>~.-^••;- J ! % s'i!-..^ \ ^ r 3 K I I . 11.-s^!M t ^ ^ s ^ r ' ^ 1 - ^ ; ^•;=^..==.^==^^,^.^^—^...1^. _sh___. __^rLJ_ ^ {==^ /t^^ & \ i ~ 3 ^ 1 ^ R!— t d 3 • • . = = s 7^- = = 3 = = m : w : ? : = s 7 t W f 3 -i=J ^ 11^®Sl3=====nT3 ! . W •a% p > i •I...; ; : 0 .1 ^ % ? " s \ Q- \ - % ^i.^§1 ^ M-.S5=Q^i r * • % ^Jl ^ ' rt : i . . . . . . . . . . . . - ^ S.I^ c > - IHt"1 a - -7I1^'———^J • : ? 5 ^1!v^"••"--j ^ ^ ' ^ ' ^ t ^ I -.—..— i ! ^ ! ^ \ L ^ •fe* — ' — — y - ^<1@jSQap ^ » 2 = £ y ; EC i . . fc S S : ^ _ _ _ ^ . ^ , » ^ - . ' i l l FLANDERS MILL ROAD ^ i - - . ' ^ : ' ^ 4 i \ ^.i . ' ! ' - s sr ) - ~ . } ^ is s ' ; 1 5 ^--I < n E?—.ii - 2 . - — j — . , — . . y ^ - - . ^ -i ^ a a r " w ^ ^ w BAXTER CREEKI DRAINAGE BASIN2;Q SQ. MILES . ' \ * / ! • • ^ - ^ / . ^ " i , 1 - 1 ' ^ 1 A . u A SF \ - s l S S ) < 3 ! I • *.--1 - ^?..-.cbek^l"LMJ3fcEL GLEN |~^F —R^ SUBDIVISION J?%B -% - ; - . ^ - - S —:• i M • ; • s ; ^ ' j ^ , - / . £ - _ i , 5? , _ . . _ - — . - i — . „ „ , ; a t " " • " - • • • " ^ • " • • • • 1 \ ! . t ? — X - ^ — T J 1 : ^ l ^ c D o n o i o : V T ^ = = = - = - = t \ s.'?• ^ 3 . ; ^ ' ^ ^ 1 -I•::• " ^ ' ^ -f^foy ^ -I & ? - j L r i aai^ I k . s j ; ^ ; - ^ _ _ ^ ^ ^ ^ ^ ^ i ^ ' ^ i ' 5 , t 'y:--^ 0 ^ y t - 9 \ . . . r i ••^-s • e •^.. • f l : 1 _ ± l _ , , , ^ , y ^ ^ ^ ^ . — _ . . - . , ^ - — , , ^ , - - ^ . - . ^ -I _ _ ' ^ & = 2 f c ° ; ^ - 7 = ^ ; ^ x •« ° * • = ^ ^ ^ ^ ^ S x : ^ ^ : : ^ r - ^ — . - „ ! • — • . - . , . - . . . ^ ^ y - - , - - : : n ^ ^ . . . . . . . ^ . . . . . ^ . . . ^ , . ^ . . . ^ . . . . . . . . . : : . - ^ ^ ^ ' • „ • _ . . . . . . . . . . . . . . . . s Srf-F:---:;:-gi " • * - > / ! 0 f y " : ^ ^ . i i * 5 Q *.? s " " r ; : « - - : ' ^ -••'u \ }- ?";~y.^ a s • - , ~Ss= J l I s \ 1 1 s l I I > [ NO.REVISIONSDRAWN BYDATC100020003000SCALE: 1 INCH -2000 FEETPROJECT ENGINEER: PJSDESIGNS) BY: PJS DRAWN BY: RFCREVIEWED BY: DSC, CBG L A U R E L G L E N S U B D I V I S I O N B A X T E R C R E E K D R A I N A G E B A S I N B O Z E M A N , M O N T A N A a s e ' » f / - a s ^ 2 S A L L I E D E N G I N E E R I N G S E R V I C E S , I M C C i v i l E n g i n e e r i n g L a n d S u r y e y i n g G e o t e c l u i i c a ] E n g i n e e r i n g S t r u c t u n i E n g i n e e r i n g 3 2 D I S C O V E R Y D R I V E B 0 2 E M A N , M T S 9 7 1 S P H O N E ( 4 0 6 ) 5 8 2 - 0 2 2 1 F A X ( 4 0 6 ) 5 S 2 - 5 7 7 0 P R O J E C T ( k 0 0 - 1 8 5 D A T E : 1 2 / 2 9 / 0 1 R o o d O g 3 . d w g F I G U R E 3 L A U R E L G L E N D R A I N A G E C O R R I D O R B o b M u r r a y F e b r u a r y 4 , 2 0 0 2 n n P r o j e c t 0 0 - 1 8 5 r . F a n n e r s C a n a l c o l l e c t s d r a i n a g e f r o m t h e s o u t h a s i t t r a v e r s e s n o r t h e a s t a c r o s s t h e v a l l e y f r o m i t s G a l l a t i n R i v e r i n t a k e t o B o z e m a n . T h r o u g h s l i d e g a t e s l o c a t e d o n t h e c a n a l , t h e F a r m e r s C a n a l C o m p a n y c a n d i s c h a r g e w a t e r t o t h e B a x t e r C r e e k d r a i n a g e . F u r t h e n n o r e , p o n d s , c u l v e r t c r o s s i n g s , d i t c h e s , r o a d s , a n d o t h e r o b s t r u c t i o n s h a v e s i g n i f i c a n t l y a l t e r e d t h e h i s t o r i c a l d r a i n a g e n e t w o r k f o r t h e b a s i n s . R e f e r t o F i g u r e F o u r f o r a n a n n o t a t e d a e r i a l p h o t o s h o w i n g s o m e o f t h e f e a t u r e s o f t h e b a s i n s . T h r e e d i f f e r e n t h y d r o l o g i c m e t h o d s w e r e u s e d t o e s t i m a t e h i s t o r i c a l r u n o f f . T h e m e t h o d s u s e d a r e : R a t i o n a l , S C S T R - 5 5 , a n d t h e U S G S r e g r e s s i o n s e q u a t i o n s g i v e n i n W a t e r - R e s o u r c e s I n v e s t i g a t i o n s R e p o r t 9 2 - 4 0 4 8 ( O m a n g , 1 9 9 2 ) . T h e a p p l i c a b i l i t y o f e a c h o f t h e s e m e t h o d s d e p e n d s u p o n d r a i n a g e a r e a a n d o t h e r f a c t o r s . F o r e x a m p l e , t h e U S G S r e g r e s s i o n e q u a t i o n s d o n o t c o n s i d e r a v e r a g e s l o p e o f t h e b a s i n , a n d t h e r e f o r e w o u l d t e n d t o o v e r e s t i m a t e p e a k f l o w s f o r r e l a t i v e l y f l a t b a s i n s ( w h i c h t h e s e a r e ) . T h e s t a n d a r d e r r o r s o f p r e d i c t i o n o f t h e U S G S r e g r e s s i o n e q u a t i o n s r a n g e f r o m 2 2 t o 1 2 8 p e r c e n t . B o t h t h e R a t i o n a l m e t h o d a n d S C S m e t h o d r e q u i r e t i m e o f c o n c e n t r a t i o n ( t c ) a s a n i n p u t . T h e ' t i m e o f c o n c e n t r a t i o n , t c w a s e s t i m a t e d u s i n g M a n n i n g ' s k i n e m a t i c s o l u t i o n a l o n g w i t h M a n n i n g ' s e q u a t i o n f o r o p e n c h a n n e l f l o w . D e v e l o p m e n t i n t h e b a s i n s b o t h i n c r e a s e s a n d d e c r e a s e s t h e t i m e o f c o n c e n t r a t i o n a s c o m p a r e d t o t h e p r e - d e v e l o p m e n t c o n d i t i o n . T c i s d e c r e a s e d b y c l e a r i n g b r u s h , p a v i n g , d r a i n a g e d i t c h e s , e t c . , a n d i n c r e a s e d b y d e t e n t i o n f r o m r o a d s , p o n d s a n d o t h e r o b s t r u c t i o n s . A d e t a i l e d a n a l y s i s a c c o u n t i n g f o r d e t e n t i o n a n d d i t c h e s i s b e y o n d t h e s c o p e o f t h i s p r o j e c t . T h e R a t i o n a l m e t h o d r e q u i r e s t h e r a i n f a l l i n t e n s i t y t o c o r r e s p o n d t o a d u r a t i o n e q u a l t o t c . T h e r e q u i r e d i n t e n s i t y v a l u e w a s e s t i m a t e d f r o m t h e I n t e n s i t y - D u r a t i o n - F r e q u e n c y ( I D F ) e q u a t i o n s g i v e n o n F i g u r e 2 3 o f t h e B o z e m a n S t o r m w a t e r M a s t e r P l a n ( 1 9 8 2 ) . C h a r a c t e r i s t i c s o f t h e d r a i n a g e b a s i n a r e p r o v i d e d i n T a b l e 1 . I D A r e a ( a c r e s ) C u r v e N u m b e r R a t i o n a l c T c ( H o u r s ) B a x t e r C r e e k B a s i n 1 2 6 3 7 4 0 . 3 3 . 2 B a x t e r C r e e k B a s i n H u f f i n e - S o u t h o f 7 0 0 7 4 0 . 3 2 . 5 T a b l e 1 . D r a i n a g e B a s i n C h a r a c t e r i s t i c s . L F o r a n a l y z i n g h i s t o r i c a l f l o w s , t h e S C S m e t h o d i s s e l e c t e d a s i t b e s t t a k e s i n t o a c c o u n t t h e v a r i o u s l o c a l v a r i a b l e s t h a t e f f e c t r u n o f f . T h e d e f a u l t S C S r a i n f a l l d i s t r i b u t i o n f o r M o n t a n a i s T y p e I I . B a s e d o n t h e c r i t e r i a i n s e c t i o n 7 . 2 0 . 3 o f t h e M D T H y d r a u l i c s m a n u a l , a n S C S T y p e I d i s t r i b u t i o n w a s d e t e n n i n e d t o b e m o r e a p p r o p r i a t e f o r u s e i n B o z e m a n . A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . P a g e 5 ni•—fEE5S S B S B B s S O g a K - ^ 9 s "-3SI m % ^ -saW£S a s » • E S ^ w m I t m m . B a e ? wmm s s s . °% a s »s • £ v : ^ ^ s S S 2 S . - w w s s e s a mvs SXSSI i e ® '^s.Pim&-isea ^ i m S E m,mfK' m m 9 m . -iiBsvm g m s i <- 2 S S s®-I. ® f S • a . 1 ^ Iss i S » ^•'' - ® g g j & i ^ a % s ' - a s a a s g i S 8 ° 1 3 •^ s s^ s S S ^ ^ i m 38^. • • w Siim m ^ 1 F S d ^ -s m ^ m M e " l s i m °.s:^ ' s ' s E - f e B g m ISjg m ss s « W M m 3m^^—r-f ^ : - w m s s i % ^^g^ - — s s f& a ^ & m a s ^ m i e ^ ? B I B S f i m & 5.%%BsSg a E •S3 . « M B K 1 ^ ^ S 9 • a s s S S a 3 ¥ £ , i a W f s a ^ ^^wss N S K m !;X m @ N 8 i stt®§E^ a m I s'35 e m - « ^ m i m s l S S * § I i^ m s v S s m ^ a a »: s S s K ^ ? 5 a a i ^ s s as ^ a 3 t e S S s ^ n I SS9s«r s s m i=2 s I S 1 < a ^ I ^ s s W t s i i m s ^ S i NO.REVISIONSDRAW! BYDATE1000 2000 3000SCALE: 1 INCH -2000 FEET P R O J E C T f : 0 0 - 1 8 5 F I G U R E L A U R E L G L E N S U B D I V I S I O N B A X T E R C R E E K D R A I N A G E B A S I N B O Z E M A N . M O N T A N A C i v i l E n g i n e e n n g L a n d S u r y e y i a g G e o t e c h n i c a l E n g i n e e r i n g S t r u c t u r i d E n g i n e e r i n g s s s s , 1 2 / 2 B / 0 1 D A T E : 3 2 D I S C O V E R Y D R I V E B O Z E M ^ N , M T 5 9 7 1 8 P H O N E ( 4 0 6 ) 5 8 2 . 0 2 2 1 F A X ( 4 0 6 ) 5 3 2 - 5 7 7 0 4 A L L I E D R o o d F l g 4 . d » g PROJECT ENBNEER: PJSDRAWN BY: RFC L A U R E L G L E N E N G I N E E R I N G DES16NED BY: PJSREVIEWED BY: PJS D R A I N A G E C O R R I D O R B o b M u r r a y F e b m a r y 4 , 2 0 0 2 \ P r o j e c t : 0 0 - 1 8 5 r ( ) u T h i s i s b a s e d o n t h e r a t i o o f t h e l o c a l s i x a n d t w e n t y - f o u r h o u r p r e c i p i t a t i o n v a l u e s g i v e n i n t h e N O A A a t l a s . T h e p e a k f l o w s p r e d i c t e d b y t h e R a t i o n a l M e t h o d a r e s i g n i f i c a n t l y h i g h e r , p a r t i c u l a r l y f o r f r e q u e n t s t o r m e v e n t s . O n e r e a s o n i s t h a t t h e R a t i o n a l m e t h o d d o e s n o t a c c o u n t f o r i n f i l t r a t i o n i n a w a y t h a t w o u l d d i f f e r e n t i a t e t h e i n c r e a s e d p e r c e n t a g e o f i n f i l t r a t i o n t h a t o c c u r s f o r s m a l l e r ( m o r e f r e q u e n t ) s t o r m e v e n t s . F o r e x a m p l e , f o r a g i v e n b a s i n , t h e r e i s s o m e t h r e s h o l d s t o r m e v e n t f o r w h i c h s m a l l e r s t o r m s w i l l y i e l d p r a c t i c a l l y n o m n o f f . T h i s i s m o d e l e d b y a n i n i t i a l a b s t r a c t i o n i n t h e S C S m e t h o d b u t i s n o t p r e d i c t e d b y t h e r a t i o n a l m e t h o d . I n s u m m a r y , i t i s o u r o p i n i o n t h a t t h e S C S m e t h o d i s t h e m o s t a p p l i c a b l e f o r e s t i m a t i n g h i s t o r i c a l " m n o n " f l o w s f r o m t h e u p s t r e a m b a s i n . R e s u l t s o f t h e h y d r o l o g i c m o d e l i n g a r e p r o v i d e d i n T a b l e T w o . A p p e n d i x A c o n t a i n s d e s i g n n o t e s a n d i n f o r m a t i o n u s e d f o r t h e h y d r o l o g i c a n a l y s i s . N o t e t h a t t h e c o m p u t e r p r o g r a m C u l v e r t M a s t e r w a s u s e d t o c a l c u l a t e t h e S C S a n d R a t i o n a l m e t h o d g i v e n t h e f o l l o w i n g i n p u t s : 1 ) S C S - b a s i n a r e a , S C S r a i n f a l l t y p e I , t i m e o f c o n c e n t r a t i o n , c u r v e n u m b e r = 7 4 , a n d t h e 1 0 0 - y e a r 2 4 - h o u r p r e c i p i t a t i o n d e p t h ( f r o m N O A A ) = 2 . 8 i n c h e s ; 2 ) R a t i o n a l - b a s i n a r e a , C c o e f f i c i e n t , I D F d a t a f r o m t h e C i t y o f B o z e m a n S t o r m . W a t e r M a s t e r P l a n , t i m e o f c o n c e n t r a t i o n , a n d a 1 0 0 - y e a r r e t u r n p e r i o d . I n d e t e n n i n i n g t h e c u r v e n u m b e r f o r t h e S C S m e t h o d , w e a s s u m e d a p a s t u r e c o v e r t y p e i n g o o d h y d r o l o g i c c o n d i t i o n a n d a h y d r o l o g i c s o i l g r o u p C ( s e e A p p e n d i x C f o r s o i l s i n f o m i a t i o n ) . I D U S G S ( c f s ) R a t i o n a l ( c f s ) s c s ( c f s ) B a x t e r C r e e k B a s i n 4 2 2 1 7 7 1 2 9 B a x t e r C r e e k B a s i n H u f f i n e - S o u t h o f 8 2 T a b l e 2 . B a s e F l o o d ( 1 0 0 - y e a r ) v a l u e s f o r d i f f e r e n t H y d r o l o g i c M e t h o d s . W e a l s o l o o k e d a t t h e p o s s i b i l i t y o f i n c r e a s e d p e a k f l o w s d u r i n g a 1 0 0 - y e a r s t o m i e v e n t h i g h e r t h a n t h o s e c a l c u l a t e d u s i n g s t a n d a r d h y d r o l o g i c m e t h o d s ( S C S ) d u e t o t h e a l t e r e d c h a r a c t e r i s t i c s o f t h e b a s i n . S p e c i f i c a l l y , w e i n v e s t i g a t e d t h e p o s s i b i l i t y o f h i g h e r p e a k f l o w s o c c u r r i n g d u e t o F a r m e r s C a n a l d i s c h a r g i n g w a t e r i n t o t h e b a s i n , s a y b y a n o v e r t o p p i n g o r b r e a c h i n g o f t h e c a n a l b a n k . W h i l e w e a r e u n s u r e o f h o w m u c h f l o w F a r m e r s C a n a l c o u l d d i s c h a r g e i n t o t h e b a s i n , w e d e c i d e d t o l o o k a t t h e c a p a c i t y o f t h e c u l v e r t w h i c h c o n v e y s B a x t e r C r e e k u n d e r H u f f i n e L a n e . W e o b t a i n e d t h e h y d r o l o g i c a n a l y s i s ( s e e A p p e n d i x B ) d o n e b y t h e M o n t a n a D e p a r t m e n t o f T r a n s p o r t a t i o n ( M D T ) i n 1 9 9 4 f o r t h e H u f f i n e L a n e r e b u i l d p r o j e c t . I n t h e i r h y d r o l o g i c a n a l y s i s f o r t h e c u l v e r t d e s i g n , M D T c a l c u l a t e d t h e f o l l o w i n g : B a s e F l o o d ( 1 0 0 - y e a r ) a t c u l v e r t = 9 0 c f s O v e r t o p p i n g F l o o d ( o v e r t o p s b a s i n d i v i d e l o c a t e d a p p r o x i m a t e l y 3 2 0 f e e t t o t h e w e s t ) = = 1 2 2 c f s w i t h a f r e q u e n c y o f < 0 . 2 % ( g r e a t e r t h a n 5 0 0 y e a r s ) A l l i e d E n g m e e r i n g S e r v i c e s , I n c . P a g e ? B o b M u r r a y F e b m a r y 4 , 2 0 0 2 P r o j e c t : 0 0 - 1 8 5 F l H e a d w a t e r a t O v e r t o p p i n g = 5 . 3 f e e t C h a n n e l c a p a c i t y = 6 5 c f s D e s i g n C u l v e r t : 5 4 " C M P W e f i e l d v e r i f i e d a 5 4 " C M P c u l v e r t i n p l a c e w i t h t h e f o l l o w i n g c h a r a c t e r i s t i c s : L e n g t h = 1 3 9 f e e t I n v e r t E l e v a t i o n I n = 4 8 4 6 . 0 2 f e e t I n v e r t E l e v a t i o n O u t = : 4 8 4 3 . 7 2 f e e t U s i n g t h e c o m p u t e r p r o g r a m C u l v e r t M a s t e r b y H a e s t a d M e t h o d s , w e c a l c u l a t e d a h e a d w a t e r d e p t h o f 5 . 4 f e e t a t a f l o w o f 1 2 2 c f s w h i c h c l o s e l y m a t c h e s t h e o v e r t o p p i n g a n a l y s i s d o n e b y M D T . U s i n g t h e S C S m e t h o d w e a l s o c a l c u l a t e d a 1 0 0 - y e a r b a s e f l o o d o f 8 2 c f s a t t h e c u l v e r t w h i c h i s r e a s o n a b l y c l o s e t o t h e b a s e f l o o d f l o w o f 9 0 c f s c a l c u l a t e d b y M D T . T h i s n u m b e r ( 8 2 c f s ) w a s u s e d t o e s t i m a t e t h e p r o p o r t i o n o f t h e f l o w g e n e r a t e d b y t h e b a s i n u p s t r e a m o f H u f f m e a n d d o w n s t r e a m o f H u f f i n e . C o n s i d e r i n g t h e p o s s i b i l i t y o f a d d i t i o n a l f l o w f r o m F a r m e r s C a n a l , a b a s e f l o o d o f 1 6 9 c f s a t t h e p r o j e c t s i t e w a s u s e d f o r o u r h y d r a u l i c a n a l y s i s . W e a r r i v e d a t t h i s b y a d d i n g t h e o v e r t o p p i n g f l o w o f 1 2 2 c f s c o n v e y e d u n d e r H u f f i n e L a n e t o t h e f l o w c o n t r i b u t i o n n o r t h o f H u f f i n e L a n e , 4 7 c f s ( 1 2 9 c f s f o r e n t i r e b a s i n - 8 2 c f s a t H u f f m e c u l v e r t = 4 7 c f s ) . H y d r a u l i c s W a t e r s u r f a c e p r o f i l e s f o r t h e p r o p o s e d d e v e l o p m e n t w e r e e s t i m a t e d u s i n g t h e U . S . A r m y C o r p o f E n g i n e e r s ' H E C - R A S R i v e r A n a l y s i s S y s t e m c o m p u t e r P r o g r a m , V e r s i o n 3 . 0 . 1 ( M a r c h , 2 0 0 1 ) . T h e g e o m e t r y u s e d i n t h e m o d e l a s s u m e s p o s t - d e v e l o p m e n t c o n d i t i o n s w h i c h i n c l u d e t h e f o l l o w i n g : F i v e r o a d s c r o s s i n g B a x t e r C r e e k a s s h o w n i n F i g u r e O n e . C u l v e r t s e x t e n d 1 5 f e e t b e y o n d t h e r o a d r i g h t o f w a y . T h e f o l l o w i n g r i g h t o f w a y w i d t h s w e r e a s s u m e d : o O a k S t r e e t : 1 2 0 f e e t o G l e n E l l e n D r i v e : 6 0 f e e t o A n n i e S t r e e t : 7 4 f e e t o G l e n w o o d D r i v e : 6 0 f e e t o D u r s t o i i R o a d : 1 2 0 f e e t R e m o v a l o f t h e e x i s t i n g p o n d a n d o u t l e t s t r u c t u r e l o c a t e d o n t h e s o u t h e n d o f t h e p r o j e c t a n d c o n s t m c t i o n / r e s t o r a t i o n o f t h e s t r e a m c h a n n e l i n t h i s a r e a . u A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . P a g e 8 B o b M u r r a y F e b m a r y 4 , 2 0 0 2 r " , P r o j e c t : 0 0 - 1 8 5 r \ T h e c h a n n e l p o r t i o n o f t h e c r o s s s e c t i o n s a t t h e u p s t r e a m a n d d o w n s t r e a m e n d o f t h e c u l v e r t s w e r e i n t e r p o l a t e d f r o m t h e f i e l d s u r v e y e d s e c t i o n s w h i l e t h e o v e r b a n k p o r t i o n o f t h e s e c t i o n s w a s t a k e n f r o m t h e t o p o g r a p h i c s u r f a c e g e n e r a t e d f r o m t h e f i e l d s u r v e y . C r o s s s e c t i o n s 4 0 , 4 2 0 , 5 4 0 , 1 1 1 0 , 1 3 3 0 , a n d 1 3 4 0 w e r e i n t e r p o l a t e d e n t i r e l y f r o m s u r v e y e d f i e l d d a t a . T h e s e l e c t i o n o f M a n n i n g ' s n v a l u e s w a s b a s e d o n T a b l e 5 - 6 o n p a g e 1 1 2 o f C h o w ' s t e x t O p e n - C h a n n e l H y d r a u l i c s ( C h o w , 1 9 5 9 ) . T h e f o l l o w i n g n v a l u e s w e r e u s e d : • C h a n n e l = 0 . 0 4 O v e r b a n k ( h i g h g r a s s ) = 0 . 0 4 5 O v e r b a n k ( b n i s h ) = 0 . 0 9 O v e r b a n k ( i n t e r m i t t e n t b r u s h ) 0 . 0 6 C o n c r e t e P i p e = 0 . 0 1 3 T h e m o d e l w a s r u n i n t h e m i x e d f l o w r e g i m e w i t h s t a r t i n g c o n d i t i o n s a t t h e d o w n s t r e a m a n d u p s t r e a m e n d o f t h e m o d e l s e t a t n o r m a l d e p t h w i t h s l o p e s o f 0 . 0 0 7 5 a n d 0 . 0 2 f t / f t , r e s p e c t i v e l y . A m i x e d f l o w r e g i m e w a s u s e d b e c a u s e b o t h s u p e r c r i t i c a l ( i n a n d d o w n s t r e a m o f t h e c u l v e r t s ) a n d s u b c r i t i c a l f l o w o c c u r i n t h e m o d e l . A s d i s c u s s e d i n t h e h y d r o l o g y s e c t i o n o f t h i s r e p o r t , a b a s e f l o o d o f 1 6 9 c f s w a s u s e d i n t h e m o d e l . T o a c c o u n t f o r p o s s i b l e f u t u r e d e v e l o p m e n t o u t s i d e o f t h e s t r e a m c o r r i d o r , e n c r o a c h m e n t m e t h o d n u m b e r o n e w a s r u n i n H E C - R A S w i t h e n c r o a c h m e n t s s e t a t t h e s t r e a m c o r r i d o r b o u n d a r y ( i . e . a t t h e p r o p e r t y b o u n d a r y b e t w e e n t h e s t r e a m c o r r i d o r a n d a d j a c e n t p r i v a t e / p a r k l a n d s ) . A s s h o w n i n F i g u r e F i v e , t h e u n - e n c r o a c h e d b a s e f l o o d o n l y g o e s o u t s i d e t h e s t r e a m c o r r i d o r s i g n i f i c a n t l y i n t h e b a c k w a t e r a r e a s u p s t r e a m o f c u l v e r t s . T h e r e w a s n o s i g n i f i c a n t d i f f e r e n c e b e t w e e n t h e w a t e r s u r f a c e e l e v a t i o n o f t h e e n c r o a c h e d a n d u n - e n c r o a c h e d m o d e l s . T h e d a t a f o r t h e e n c r o a c h e d a n d u n - e n c r o a c h e d r u n s i s p r o v i d e d i n A p p e n d i x D . R e i n f o r c e d c o n c r e t e p i p e ( R C P ) c u l v e r t s w e r e u s e d i n t h e m o d e l a s t h e y a r e r e q u i r e d b y t h e C i t y o f B o z e m a n ( p a g e 4 7 o f C i t y o f B o z e m a n D e s i g n S t a n d a r d s a n d S p e c i f i c a t i o n s P o l i c y , 2 0 0 1 ) . T o e v a l u a t e b a c k w a t e r u p s t r e a m o f r o a d c r o s s i n g s , w e m o d e l e d t h r e e c u l v e r t c o n f i g u r a t i o n s f o r t h e r o a d c r o s s i n g s : 1 . T w o 4 8 - i n c h R C P c u l v e r t s 2 . T w o 5 8 . 5 x 3 6 i n c h r e i n f o r c e d c o n c r e t e p i p e a r c h ( R C P A ) c u l v e r t s 3 . O n e 8 8 x 5 4 i n c h R C P A c u l v e r t I n d e t e r m i n i n g t h e f l o o d p l a i n e l e v a t i o n s f o r o u r s t u d y , w e c h e c k e d t h e a b o v e t h r e e o p t i o n s f o r e a c h c r o s s i n g s a n d u s e d t h e o p t i o n t h a t r e s u l t e d i n t h e h i g h e s t w a t e r s u r f a c e u p s t r e a m o f e a c h c r o s s i n g . W e c h o s e n o t t o c o n s i d e r m o r e t h a n t w o c u l v e r t b a r r e l s t o a v o i d t h e n e e d t o w i d e n t h e s t r e a m b e d ( g e n e r a l l y 8 t o 1 8 f e e t f r o m b o t t o m o f b a n k t o b o t t o m o f b a n k ) . O f c o u r s e l a r g e r c u l v e r t s w o u l d a l s o b e a c c e p t a b l e b u t w o u l d c o s t m o r e . A U i e d E n g m e e n n g S e r v i c e s , I n c . P a g e 9 E X I S T I N G G R O U N D C O N T O U R 5 - F O O T I N T E R V A L L E G E N D z 200 C R O S S S E C T I O N L O C A T I O N B R U S H F L O O D P L A I N B O U N D A R Y B A S E F L O O D C O N T O U R E X I S T I N G G R O U N D C O N T O U R 1 - F O O T I N T E R V A L r C E N T E R L I N E O F B A X T E R C R E E K P R O P O S E D L O T L I N E 4-760%riSfi«-•g^x.. < : : 0 . 0 0 0 0 : t . S 0 ! 0 0 r ^ r p ; c ^ . 0 ~ ^ < . , . , h ^ • - . , . . 0 - / \ • : : ^ E - . - ^ — „ - ; / < „ „ - c n . A \ . E W E : \ s w E S I : - ^ ^ c o j i : " " N ^ • . Q ) ^ ^ ^ • A ' _ 0 " " ' s - : - ; > : - I A 0 ^ ' . ^ ^ ^ f ^ ' ^ A I ^ - 1 - \ ^ ^ A ' ^ > - : ^ ^ \ / - — \ \ % w 4 7 6 8 0 ^ . ( t i v ^ ^ t 0 ^ ^ ^ ^ y . ' 7 • / • y o Q / ' ^ j i , . y - , / y [ ^ « , . ^ " r i < . l l l f c - . - ' - " f ^ ' ^ ' V I I I V " 0 Q ; < ' l : | ^ d - - . o ^ : " > " j ! i ^ i ; ' i : I ' . I : 0 IH c o 0 0 MS L O »iB! | g' C T l ^ - m ^ L l , 0 ' ;l! ' 6 ' . 0 1^ I ( 5 ' ^ f . ^ M . x s w - ^ ^ W i ^ s ^ w i K i . f e s s ^ s s . ' ^ r K ^ s s s s a i i s e w s s & s ! : ! - . •^.'10•-.2srf-•^y,-t> i ^ y ' - A J(> Q ) < y j ' . 7 < 0 / < y (^ L - ^ : / y 7 u - ^ / \ CP^CP \ w ^ / ^ - ^-^5fe.i<3 0 (^ v ....'-•^ < b w^•\ ^ ..-:3^^ i n t y - ^J.. t 0 ^ , - - " 0 0 . -^'s . ^<b/ / • ^ f - . L O ^^00 - s L F 3 L O ' ^/?0<^010^--:"%..IJ:,0r~-c? ^ 0 -p- - • • • - • • - 1 : I I H i ' [ : l g l c / 3 . . . 4 ^ 1 1 ^ -r^^-.,.-xr0-^-SfS-^S r ^ :^:/E-..-r:0 < y (-^ L O •~J\0 0 5 . ^ ^ ;: -1,*^-/f.(J1 i n OJ0 s 0^^•M':O-PLO / i . r^ ^t-•^t-mxh 1 s ^ ±s^=2^. '"-"<'. . / ' LAUREL PARKWAY; " ' r " ' :^ Q' ? : • Y'. ~—~- '^.s l : 's '•'• > . ' ^;^:»:.:^:.^^' ;;' ' ' ; ^ '."•-:... . ———a;-:5! | : ' ' ' . '"'•••^, •-••••• ''• ' i . ^ " s 1 s ^•""^ 3 - P R O J E C T f : 0 0 - 1 8 5 F I G U R E NO.REVISIONSDRAWN BYDATE0200 300SCALE: 1 INCH = 200 FEET 100 L A U R E L G L E N S U B D I V I S I O N B A X T E R C R E E K F L O O D P L A I N B O U N D A R Y B O Z E M A N , M O N T A N A C i v i l E n g i n e e r i n g L a n d S u r v e y i n g G e o t e c h n i c a l E n g i n e e r i n g S t r u c t u r a l E n g i n e e r i n g 1 2 / 2 9 / 0 1 D A T E ^ ^ s . 3 2 D I S C O V E R Y D R I V E B O Z E M A N . M T 5 9 7 1 8 P H O N E ( 4 0 6 ) 5 8 2 - 0 2 2 ) F A X ( 4 0 6 ) 5 8 2 - 5 7 7 0 . Z S i A L L I E D R o o d R g 5 . d w g PROJECT ENGINEER: PJSORAWN BY: RFC L A U R E L G L E N S U B D I ^ S I O N ^ F L O O D P L A I N B O U N D A R Y E N G I N E E R I N G DESIGNED BY:PJSREVIEWED BY: DSC, C8G B o b M u r r a y F e b r u a r y 4 , 2 0 0 2 P r o j e c t : 0 0 - 1 8 5 T h e e x i s t i n g c u l v e r t a t D u r s t o n R o a d i s a 4 8 - i n c h c o r r u g a t e d m e t a l p i p e ( C M P ) . W e a l s o e v a l u a t e d t h e c u l v e r t c r o s s i n g s i n H E C - R A S u s i n g o n e 4 8 - i n c h R C P c u l v e r t t o m a t c h t h e s i z e o f t h e e x i s t i n g c u l v e r t a t D u r s t o n R o a d . U s i n g o n e 4 8 - i n c h R C P c u l v e r t a t t h e r o a d c r o s s i n g s i n c r e a s e d t h e b a c k w a t e r a p p r o x i m a t e l y o n e t o t w o f e e t c o m p a r e d t o t h e c u l v e r t c o n f i g u r a t i o n s l i s t e d a b o v e . F i g u r e F i v e s h o w s a p l a n v i e w o f t h e s i t e w i t h t h e u n - e n c r o a c h e d b a s e f l o o d b o u n d a r y a n d u n - e n c r o a c h e d b a s e f l o o d c o n t o u r s . N o t e t h a t t h e f l o o d e l e v a t i o n s i n F i g u r e F i v e a r e t h e m a x i m u m o f t h e t h r e e w a t e r s u r f a c e e l e v a t i o n s c a l c u l a t e d f o r t h e t h r e e a b o v e l i s t e d c u l v e r t c o n f i g u r a t i o n s . A p p e n d i x D c o n t a i n s s u m m a r y p r i n t o u t s f r o m t h e H E C - R A S p r o g r a m . I n t h e H E C - R A S o u t p u t , p r o f i l e o n e r e f e r s t o t h e u n - e n c r o a c h e d g e o m e t r y a n d p r o f i l e t w o r e f e r s t o t h e e n c r o a c h e d g e o m e t r y . U n f o r t u n a t e l y , t h e r e i s n o h i s t o r i c a l d a t a ( f l o w s a n d f l o o d e l e v a t i o n s ) t o c a l i b r a t e t h e m o d e l f o r h i g h f l o w . I f d a t a e x i s t e d t o c a l i b r a t e t h e m o d e l , t h e M a n n i n g ' s n v a l u e s c o u l d p o s s i b l y c h a n g e . I n c r e a s i n g M a n n i n g ' s n v a l u e s w o u l d i n c r e a s e t h e b a s e f l o o d e l e v a t i o n . W e b e l i e v e t h e M a n n i n g ' s n v a l u e s u s e d i n o u r m o d e l a r e r e a s o n a b l e . R e c o m m e n d a t i o n s W e r e c o m m e n d i n s t a l l i n g o n e o f t h e f o l l o w i n g c u l v e r t c o n f i g u r a t i o n s a t t h e f i v e r o a d w a y c r o s s i n g s : 1 . T w o 4 8 - i n c h R C P c u l v e r t s 2 . T w o 5 8 . 5 x 3 6 i n c h r e i n f o r c e d c o n c r e t e p i p e a r c h ( R C P A ) c u l v e r t s 3 . O n e 8 8 x 5 4 i n c h R C P A c u l v e r t W i t h t h e e x c e p t i o n o f r o a d c r o s s i n g s , w e a l s o r e c o n m i e n d k e e p i n g t h e s t r e a m c o r r i d o r i n a n a h i r a l c o n d i t i o n f r e e f i r o m o b s t r u c t i o n ( e . g . b u i l d i n g s a n d c o n s t r u c t e d f i l l o t h e r t h a n r o a d c r o s s i n g s ) . A l t h o u g h n o f l o o d p l a i n i s o f f i c i a l l y d e s i g n a t e d f o r B a x t e r C r e e k w i t h i n t h e s u b d i v i s i o n a r e a , a l l f l o o d p l a i n r e g u l a t i o n s c o n t a i n e d i n t h e C i t y o f B o z e m a n Z o n i n g O r d i n a n c e s h o u l d b e f o l l o w e d . F o r r e s i d e n t i a l s t r u c t u r e s w i t h i n t h e f l o D d p l a i n , s e c t i o n 1 . 8 . 4 4 . 2 7 Q . C o f t h e C i t y o f B Q z e m a i i Z o n i n g O r d i n a n c e s t a t e s t h a t " T h e N e w c o n s t r u c t i o n , a l t e r a t i o n s , a n d s u b s t a n t i a l i m p r o v e m e n t s o f r e s i d e n t i a l s t m c t u r e s i n c l u d i n g m a n u f a c t u r e d h o m e s m u s t b e c o n s t m c t e d o n s u i t a b l e f i l l s u c h t h a t t h e l o w e s t f l o o r e l e v a t i o n ( i n c l u d i n g b a s e m e n t ) i s t w o f e e t o r m o r e a b o v e t h e b a s e f l o o d e l e v a t i o n . T h e s u i t a b l e f i l l s h a l l b e a t a n e l e v a t i o n n o l o w e r t h a n t h e b a s e f l o o d e l e v a t i o n a n d s h a l l e x t e n d f o r a t l e a s t f i f t e e n f e e t , a t t h a t e l e v a t i o n , b e y o n d t h e s t m c t u r e ( s ) i n a l l d i r e c t i o n s . " S e c t i o n 1 8 . 4 4 . 2 7 0 . D g o e s o n t o s a y , " T h e n e w c o n s t r u c t i o n , a l t e r a t i o n , a n d s u b s t a n t i a l i m p r o v e m e n t o f c o m m e r c i a l a n d i n d u s t r i a l s t r u c t u r e s c a n b e c o n s t r u c t e d o n s u i t a b l e f i l l a s A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . P a g e 1 1 B o b M u r r a y F e b m a r y 4 , 2 0 0 2 r n P r o j e c t : 0 0 - 1 8 5 s p e c i f i e d i n s u b s e c t i o n C o f t h i s s e c t i o n . I f n o t c o n s t r u c t e d o n f i l l , c o m m e r c i a l a n d i n d u s t r i a l s t r u c t u r e s m u s t b e a d e q u a t e l y f l o o d p r o o f e d t o a n e l e v a t i o n n o l o w e r t h a n t w o f e e t a b o v e t h e b a s e f l o o d e l e v a t i o n . " A t a m i n i m u m , w e r e c o m m e n d t h a t s t r u c t u r e s a d j a c e n t t o t h e s t r e a m c o r r i d o r r e g a r d l e s s o f w h e t h e r t h e y a r e i n t h e b a s e f l o o d a r e a ( s e e F i g u r e 4 ) b e c o n s t r u c t e d a s o u t l i n e d a b o v e a n d i n t h e z o n i n g o r d i n a n c e . P l e a s e g i v e u s a c a l l i f y o u h a v e a n y q u e s t i o n s o r r e q u i r e a d d i t i o n a l i n f o r m a t i o n . S i n c e r e l y , A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . / ^ i l - ^ ^ j P a u l J . S a n f o r d ; P E ^ ' C i v i l E n g i n e e r D o u g l a ^ S . C h a n d l e r , P h D , P E P r i n c i p a l e n c : C o p y o f L e t t e r f r o m C r a i g E . B r a w n e r , P . E . , F o r a i e r C i t y E n g i n e e r A p p e n d i x A - H y d r o l o g y N o t e s U S G S M e t h o d R a t i o n a l M e t h o d S C S M e t h o d A p p e n d i x B - M D T H y d r o l o g i c A n a l y s i s f o r c u l v e r t c o n v e y i n g B a x t e r C r e e k u n d e r H u f f m e L a n e A p p e n d i x C - N R C S S o i l s I n f o r m a t i o n A p p e n d i x D - H E C - R A S O u t p u t S u m m a r y o f C a l c u l a t e d R e s u l t s P r o f i l e V i e w C r o s s S e c t i o n s e c : C h u c k H i n e s l e y S : \ P r o j e c t s \ 2 0 0 0 \ 0 0 - 1 8 5 L a u r e l G l e n S u b \ H y d r o l o g y - H y d r a u l i c s \ F l o o d H a z a r d R e p o r t . d o c A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . P a g e 1 2 B o b M u r r a y F e b m a r y 4 , 2 0 0 2 / ^ . P r o j e c t : 0 0 - 1 8 5 R E F E R E N C E S A r m y C o r p s o f E n g i n e e r s , ( 1 9 9 7 ) . " H E C - R A S R i v e r A n a l y s i s S y s t e m - H y d r a u l i c R e f e r e n c e M a n u a l " . D a v i s , C a l i f o r n i a . C h o w , V . T . , ( 1 9 5 9 ) . " O p e n - C h a n n e l H y d r a u l i c s " . M c G r a w - H i l l , L i e . , N e w Y o r k , N e w Y o r k . O m a n g , R . J . , ( 1 9 9 2 ) . " A n a l y s i s o f t h e M a g n i t u d e a n d F r e q u e n c y o f F l o o d s a n d t h e P e a k - F l o w G a g i n g N e t w o r k i n M o n t a n a : U . S . G e o l o g i c a l S u r v e y W a t e r - R e s o u r c e s I n v e s t i g a t i o n s R e p o r t 9 2 - 4 0 4 8 " . T h o m a s , D e a n & H o s k i n s , I n c . , ( 1 9 8 2 ) . " B o z e m a n S t o r m w a t e r M . a s t e r P l a n f o r t h e C i t y o f B o z e m a n , M o n t a n a " . A U i e d E n g i n e e r i n g S e r v i c e s , I n c . P a g e 1 3 ^ ' ' • » ^ ? u m ^ p ^ ) . ~ ^ T H E C I T l r O F B O Z E M A N 2 0 E . O L I V E » P . O . B O X 1 2 3 0 B O Z E M A N , M O N T A N A 5 9 7 7 1 - 1 2 3 0 E N G I N E E R I N G D E P A R T M E N T P H O N E : ( 4 0 6 ) 5 8 2 - 2 3 8 0 • F A X : ( 4 0 6 ) 5 8 2 - 2 3 6 3 n P a u l J . S a n f o r d , P . E . A l l i e d E n g i n e e r i n g S e r v i c e s , I n c . 3 2 D i s c o v e r y D r i v e B o z e m a n , M T 5 9 7 1 8 R e : L a u r e l G l e n S u b d i v i s i o n F l o o d H a z a r d E v a l u a t i o n D e a r P a u l ; A s w e r e c e n t l y d i s c u s s e d o n t h e t e l e p h o n e , B a x t e r C r e e k ' s h i s t o r i c a l d r a i n a g e b a s i n u p g r a d i e n t o f t h e s u b j e c t p r o p e r t y i s i n d e e d l e s s t h a n t h e 2 5 s q u a r e m i l e t h r e s h o l d r e f e r e n c e d i n o u r s u b d i v i s i o n c o d e . H o w e v e r , t h e F a r m e r s C a n a l c o l l e c t s d r a i n a g e f r o m a v e r y l a r g e p o r t i o n o f t h e u p g r a d i e n t G a l l a t i n V a l l e y b e t w e e n B o z e m a n a n d i t ' s G a l l a t i n R i v e r i n t a k e . B a x t e r C r e e k i s r o u t i n e l y u s e d b y t h e F a r m e r s C a n a l C o m p a n y d u r i n g f l o o d e v e n t s a s a " b l o w - o f f " d r a i n a g e f o r s i g n i f i c a n t r u n o f f f l o w s i t r e c i e v e s . T h u s , t h e e f f e c t i v e d r a i n a g e f o r B a x t e r C r e e k c a n b e s i g n i f i c a n t a n d i t i s t h e r e f o r e i m p o r t a n t t h a t t h e h y d r a u l i c a n d t o p o g r a p h i c a l c h a r a c t e r i s t i c s o f t h e s u b j e c t s i t e b e a s s e s s e d a n d a d d r e s s e d i n t h e d e v e l o p m e n t o f t h e s u b j e c t s i t e . A s s u c h , p l e a s e e x p e c t t h a t C i t y S t a f f w i l l a s k t h a t t h e h y d r a u l i c p r o f i l e a n d l i m i t s o f i m p a c t o f a 1 0 0 y e a r e q u i v a l e n t e v e n t b e p r o v i d e d w i t h t h e s u b d i v i s i o n s u b m i t t a l . P u r s u a n t t o t h e C i t y ' s S u b d i v i s i o n C o d e a n d i n t h a t t h e l a y - o u t o f l o t s a n d o t h e r i m p r o v e m e n t s m a y b e i m p a c t e d b y t h e f l o o d l i m i t s o f i m p a c t , t h e a s s e s s m e n t n e e d s t o b e c o m p l e t e d a n d p r o v i d e d w i t h t h e p r e l i m i n a r y p l a t s u b m i t t a l . P l e a s e c o n t a c t m e i f y o u h a v e a n y o t h e r q u e s t i o n s . S i n c e r . e . L y , / z ^ ? . . • ' - u ^ C r - ^ i g E . B r a w n e r , P . E . C i t y E n g i n e e r e c : P l a n n i n g D e p a r t m e n t P r o j e c t F i l e E R F H O M E O F M O N T A N A S T A T E U N I V E R S I T Y G A T E W A Y T O Y E L L O W S T O N E P A R K n n 0 ( " ) u 0 n n r d r ^ ( n n 0 ( : ' ) u n n r ' ^ - ^ B A X T E R N a t i o n a l F l o o d F r e q u e n c y P r o g r a m — — — — — — — — F l o o d P e a k D i s c h a r g e s , i n c u b i c f e e t p e r s e c o n d D a t e : 1 0 / 2 2 / 2 0 0 1 1 5 : 0 5 B a s i n : B a x t e r C r e e k , M o n t a n a C o n s u l t t h e l o g f i l e f o r t h e i n p u t d a t a . R e c u r r e n c e I n t e r v a l , y e a r s 2 5 1 0 2 5 5 0 1 0 0 5 0 0 R u r a l 1 6 5 7 1 0 7 1 9 6 2 9 4 4 2 2 8 4 2 0 P a g e 1 r N a t i o n w i d e S u m m a r y o f U . S . G e o l o g i c a l S u r v e y R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i n g M a g n i t u d e a n d F r e q u e n c y o f F l o o d s f o r U n g a g e d S i t e s , 1 9 9 3 C o m p i l e d B y I V i . E . J e n n i n g s , W . O . T h o m a s , J r . , a n d H . C . R i g g s U . S . G E O L O G I C A L S U R V E Y W a t e r - R e s o u r c e s I n v e s t i g a t i o n s R e p o r t 9 4 - 4 0 0 2 M T O F - ^ . % ^ ! . ( ^ ' ^ @ ' & s 5 3 a K © \ 6 e c u 3 P r e p a r e d i n c o o p e r a t i o n w i t h t h e F E D E R A L H I G H W A Y A D M I N I S T R A T I O N a n d t h e F E D E R A L E M E R G E N C Y M A N A G E M E N T A G E N C Y u R e s t o n , V i r g i n i a 1 9 9 4 n \/ ^ ^ 0 r 0 r u I 5 ^is y - i y - a - j a . " 1 : S ^ i u T5 c J n c o ^ 1 H o o S ° 0 . c - ^ • ^ ro . . 1 c ^s ~ g '- s c m w 0 j ® 0 g s — I I I s ^ 0 0 i n s . 0 ' d - §1 _ ] ' ( l l i I ' I ^^[ s \ - s \s _ . t§ l CM i s h S 1 n o c o L O c o o < n i n n o c n i n n o c b i n co c o h - r ^ - r ^ - r ^ c o c D c o r^ ^ - h - ^ r ^ - i ^ i ^ - t ^ ^ - ^ - r ^ - t ^ - N - h - ^ . ^• ^ t ' ^ f s t - t - c l - ^ l - ^ - ^ t - ^ l - ^ t - t t ^ i - ' t ' i i - ^ t - (y ) u o f f e A a | 3 0 t ;J < ' s Q - " i K. £ s l 1— 8 N- s s 1 ^ u ^ l l ro I s ; L L . ! a - Is L L a .w L L a . •c 0 ^ - s § _ " 2 • I " e g l.i . . i . . j j . , ! "T " - ' ; c •• " • • . : " ; • I t 0 3 1 s • 0 ^ t LO CO 0 ^ §1 >o o L O n o GO 0 0 0 0 0 0 1 G O L O C O -T g \[ s '} s - 8 ^ §. " g 1 s I [ s w r> i ^^ T - l ' I ' I ' ] ' I ' oo o o r ^ - r ^ - i ^ - r ^ - c D c o c D C D L O t O L n i n I I ' I LO c o o o o L O n o o o L D 0 ^ . i ^ i ^ i ^ r - ^ . r ^ . ^ - i ^ i ^ . N . ^f s t - - ^ ^ i ' ' d - i T ^ f s t ^ l - ^ l ' ^ t - (U ) U O B B A 9 1 3 [ > J ^ / ^ < . 0 ; •- . n 0 0 6 8 0 1 2 5 0 4 9 } ~ ! ^ > ^ r I T i - ^ i : ^ • l l — A ^ - ; - ; - i l \ . V ; > J ^ ^ r ^ i — r - r — r » 1 _ - ; - - L ^ • ^ ^ - \ - \ ^ . ^ - ! - ^ / - - ! ' - r - r - : - - ^ - : ^ ! - ; - : - ; - - ! - m . - : - - ! ^ - T - r - r I - i - - \ - ^ ' - - > ; - l - ^ ^ : - : - - : - - : - r - ! - - r / S - - r y - L - J - ^ ^ : - \ ' - ^ - ~ - ) - r - ; - T + - ! - ! - : - - ' - _ k - - ; - ^ / J - . : ^ - " ^ ^ r r - f - - I — ! - ! - ( - ^ - r ~ - : - ^ - r - ! - - r < t - r - - 1 - ' _ ! - f - i - J ^ - - - ± t 3 : — ! - + - ! - r - I " - - - - - i - ^ s : T - ' r T + - . , ^ — - h - : - - ^ r " - ; 4 - " - ! - ! , t - i - - - : - - I \ - ^ 7 r ! J — ! - ! ^ + - + ^ t - ^ - ' - - ! - ^ i - ' r ' ' - ^ ^ f - r - 6 I - - ! - - > - . : l - ! - ! - I . ; - 1 " " — - 1 — , L + ^ - ! - - ! - - ^ - ! - - ! — ; - ' I - - : - - - I - ^ - ' , - ! - ! - ! - . < : - - ? - ! - - ! - ; - I - - i - ; - - : - ^ - ! ; - ; - - I - ! - 7 - : - - ; - T - ! - - ( - - , s " • ^ - : : , \ ^ ! - 4 - ! - » L V i - < - I - 1 - _ 1 - ! - - ; - g - ! - - ! - - ! - - I - - ! - : ! - ' _ 1 ^ - + ^ \ m - ! - r t - ^ - - \ - ^ < 1 f - ^ = - T - ' ! - - - t ' r - r . ' T - ! - y - ' r J _ - ; - - ! - - r - r - ! - ^ - - r - - * - - ^ ^ • \ - r - ! - - ! - - ! - L - I ^ - r - I - " A - ! - - T + - : - - : - - i 7 " - - ; - - ! - - ! - " - : - ! - ! - - ! - ^ : - I - - ! - - ! - r - ! - V ' - 1 - 1 - ^ - r - ! - ^ - [ - - I - 0 • - ? - ! - " - ; - T - - r ' ^ , k - . - ^ r - ! - " + - ! - ' - L 3 2 - : - - ! - " - r - ; ^ 0 - ! - - I - - - : - - ! - - ! - N > . ; - „ 1 1 7 1 > - : - - . ' - ^ ~ ! - \ - ! " < - » - - ! - i " - 4 - - - L ; - ! - - ! - - ! - - : - - ! - • ^ ^ - L : • : \ ^ - ^ + ^ : ! - - ^ - ; - y s - - ^ - ! - . ; - ; - ! - ~ - r - ! - - s - i - P : T - ! - - ! - ^ - ! - ^ - ; - y N " r , - ' < . , - : - - ; - I ' - ! - \ y \ l + . - ! - - ! - • f ' > _ L • , i - - ; ^ s ' - ? v 0 2 5 0 5 0 0 M I L E S 0 2 5 0 5 0 0 K I L O M E T E R S E X P L A N A T I O N R e g i o n a l b o u n d a r / [ 0 ^ R e g i o n D i g i t a l b a s e f r o m U . S . G e o l o g i c a l S u r v e y 1 : 2 , 0 0 0 , 0 0 0 , 1 9 7 0 A l t e r s e q u a l - a r e a p r o j e c t i o n b a s e d o n s t a n d a r d p a r a l l e l s 2 3 . 5 a n d 4 5 . 5 d e g r e e s u 3 . M a p o f t h e c o n t e r m i n o u s U n i t e d S t a t e s s h o w i n g f l o o d - r e g i o n b o u n d a r i e s . ( F r o m C r i p p e n a n d B u e , 1 9 7 7 . ) F i g u r e 1 6 N a t i o n w i d e S u m m a r y o f U . S . G e o l o g i c a l S u r v e y R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i n g M a g n i t u d e a n d F r e q u e n c y o f F l o o d s f o r U n g a g e d S i t e s , 1 9 9 3 n S S i S i S i S i i i i i S I ^ ^ ^ ^ f f l 8 1 i i S f f ' I B i f i i l i i % ^ ^ ^ ^ i i W m w s & ^ ^ ' ^ ' • • K ' ^ : . ^ ' ' ' . ' ^ ' ' ^ i . ^ i M - - ^ ' ' / : " ' " - ; 1 1 " ' ' 1 : . ; 1 . - : ' 1 ' ' . . ' " ^ ; : ' : ; ' ' 1 ; ^ : ; " : - y , ; . ' ^ ' . ; - ' : ' ' : . ; ? ' : s - ; : ? • : : m ^ m ^ W x ^ ^ m j ^ t W - ^ . : ^ M ' . ' . . . 1 - ^ ? ; ' l : ' s ' • • ^ t s M ^ ? ; ' W H W f f i i ^ - . ' : ; ; s ' ' ; . : 1 - : ' • e : . ^ . B ? 5 : : B B S 8 8 8 i f e - : ^ : S T A T E W I D E R U R A L S u m m a r y M o n t a n a i s d i v i d e d i n t o e i g h t h y d r o l o g i c r e g i o n s ( f i g . 1 ) . T h e r e g r e s s i o n e q u a t i o n s d e v e l o p e d f o r t h e s e r e g i o n s a r e f o r e s t i m a t i n g p e a k d i s c h a r g e s ( Q T ) h a v i n g r e c u r r e n c e i n t e r v a l s T t h a t r a n g e f r o m 2 t o 5 0 0 y e a r s . T h e e x p l a n a t o r y b a s i n v a r i a b l e s u s e d i n t h e e q u a t i o n s a r e d r a i n a g e a r e a ( A ) , i n s q u a r e m i l e s ; m e a n a n n u a l p r e c i p i t a t i o n ( P ) , i n i n c h e s ; b a s i n h i g h e l e v a t i o n i n d e x ( H E + 1 0 ) , w h i c h i s t h e p e r c e n t a g e o f t h e t o t a l b a s i n a r e a a b o v e 6 0 0 0 f e e t , p l u s 1 0 ; a n d m e a n b a s i n e l e v a t i o n ( E ) , i n f e e t , d i v i d e d b y 1 0 0 0 ( E / 1 0 0 0 ) . T h e c o n s t a n t 1 0 i s a d d e d t o H E a n d E i s d i v i d e d b y 1 0 0 0 i n t h e c o m p u t e r a p p l i c a t i o n o f t h e r e g r e s s i o n e q u a t i o n . T h e u s e r s h o u l d e n t e r t h e a c t u a l v a l u e s o f H E a n d E . T h e v a r i a b l e P i s t a k e n f r o m a m a p d e v e l o p e d b y t h e U . S . S o i l C o n s e r - v a t i o n S e r v i c e ( 1 9 8 0 ) . T h e o t h e r v a r i a b l e s c a n b e m e a - s u r e d f r o m t o p o g r a p h i c m a p s . T h e r e g r e s s i o n e q u a t i o n s w e r e d e v e l o p e d f r o m p e a k - d i s c h a r g e r e c o r d s a v a i l a b l e a s o f 1 9 8 8 f o r 4 7 6 s t a t i o n s i n M o n t a n a a n d 4 6 s t a t i o n s i n a d j a c e n t s t a t e s a n d C a n a d a . T h e r e g r e s s i o n e q u a t i o n s a p p l y t o u n r e g u l a t e d s t r e a m s h a v i n g a d r a i n - a g e a r e a r a n g i n g f r o m 0 . 0 4 t o 2 , 5 5 4 s q u a r e m i l e s , b u t a r e n o t v a l i d w h e r e u n i q u e t o p o g r a p h i c o r g e o l o g i c f e a - t a r e s a f f e c t f l o o d s . T h e s t a n d a r d e r r o r s o f p r e d i c t i o n o f . t h e e q u a t i o n s r a n g e f r o m 2 2 t o 1 2 8 p e r c e n t . T h e r e p o r t b y O m a n g ( 1 9 9 2 ) i n c l u d e s g r a p h s o f f l o o d c h a r a c t e r i s - t i c s a l o n g s e v e n m a j o r s t r e a m s , a n d a t a b l e s h o w i n g b a s i n a n d f l o o d c h a r a c t e r i s t i c s a n d m a x i m u m f l o o d s o f r e c o r d a t g a g i n g s t a t i o n s . P r o c e d u r e T o p o g r a p h i c m a p s , t h e h y d r o l o g i c r e g i o n s m a p ( f i g . 1 ) , t h e m e a n a n n u a l p r e c i p i t a t i o n m a p i n U . S . S o i l C o n s e r v a t i o n S e r v i c e ( 1 9 8 0 ) , a n d t h e f o l l o w i n g e q u a - t i o n s a r e u s e d t o e s t i m a t e t h e n e e d e d p e a k d i s c h a r g e s Q T , i n c u b i c f e e t p e r s e c o n d , h a v i n g s e l e c t e d r e c u r - r e n c e i n t e r / a J . s T . N o r t h w e s t - F o o t h i i l s R e g i o n Q 2 = 0 . 6 5 3 A 0 ' 4 9 ( E / 1 0 0 0 ) 2 - 6 0 Q 5 = 3 . 7 0 A 0 - 4 8 ( E / 1 0 0 0 ) 2 ' 2 2 Q 1 0 = 8 . 3 0 A O ' 4 7 ( E / 1 0 0 0 ) 2 ' 1 0 Q 2 5 = 2 0 . 3 A ° - 4 6 ( E / 1 0 0 0 ) L 9 5 Q 5 0 = 4 7 . 7 A ° ' 4 7 ( E / 1 0 0 0 ) L 6 2 Q 1 0 0 = 7 9 . 8 A ° - 4 8 ( E / 1 0 0 0 ) L 4 ° Q 5 0 0 = 3 4 4 A 0 ' 5 0 ( E / I O O O ) 0 ' 9 8 N o r t h e a s t P i a i n s R e g i o n Q 2 = 1 5 . 4 A 0 - 6 9 ( E / 1 0 0 0 ) - 0 - 3 9 Q 5 = 7 7 . 0 A 0 ' 6 5 ( E / 1 0 0 0 ) - 0 - 7 1 Q 1 0 = 1 6 1 A O ' 6 3 ( E / 1 0 0 0 ) - ° ' 8 4 Q 2 5 = 3 4 3 A 0 - 6 1 ( E / 1 0 0 0 ) - 1 ' 0 0 Q 5 0 = 5 4 3 A 0 ' 6 0 ( E / 1 0 0 0 ) - 1 - 0 9 Q 1 0 0 - 8 1 8 A ° ' 5 9 ( E / 1 0 0 0 ) - 1 - 1 9 Q 5 0 0 = l , 7 2 0 A a 5 7 ( E / 1 0 0 0 ) - L 3 7 E a s t - C e n t r a j P l a i n s R e g i o n Q 2 = ] 4 1 A ° - 5 5 ( E / 1 0 0 0 ) - L 8 8 Q 5 = 5 0 9 A 0 ' 5 3 ( E / 1 0 0 0 ) - 1 ' 9 2 Q 1 0 = 9 1 1 A ° - 5 2 ( E / 1 0 0 0 ) ' 1 - 8 8 Q 2 5 = l , 5 4 5 A a 5 0 ( E / 1 0 0 0 ) - L 7 9 Q 5 0 = 2 , 1 0 0 A ° ' 4 9 ( E / 1 0 0 0 ) - 1 - 7 2 Q 1 0 0 = 2 , 2 6 0 A ° - 4 9 ( E / 1 0 0 0 ) - 1 - 6 2 Q 5 0 0 = 3 , 9 3 0 A ° ' 4 7 ( E / 1 0 0 0 ) - 1 - 4 4 S o u t h e a s t P l a i n s R e g i o n Q 2 = 5 3 7 A U ' 3 3 ( E / 1 0 0 0 ) 0 . 5 5 y 2 . 9 1 r 2 . 7 5 Q 5 = 1 , 3 5 0 A ° - 5 3 ( E / 1 0 0 0 ) - Q 1 0 = 2 , 0 5 0 A a 5 2 ( E / 1 0 0 0 ) - 2 - 6 4 Q 2 5 = 3 , 2 4 0 A ° ' 5 1 ( E / 1 0 0 0 ) - 2 ' 5 5 Q 5 0 = 4 , 1 4 0 A ° - 5 0 ( E / 1 0 0 0 ) - 2 ' 4 7 Q 1 0 0 = 5 , 8 5 0 A ° - 5 0 ( E / l O O O y 2 - 5 1 Q 5 0 0 = 8 , 2 5 0 A ° - 4 9 ( E / 1 0 0 0 ) - 2 ' 3 3 M O N T A N A 1 0 1 W e s t R e g i o n Q 2 = 0 . 0 4 2 A ° - 9 4 P L 4 9 Q 5 = 0 . 1 4 0 A O - 9 0 P L 3 1 Q 1 0 = 0 . 2 3 5 A ° - 8 9 P L 2 5 Q 2 5 = 0 . 3 7 9 A a 8 7 P 1 - 1 9 Q 5 0 = 0 . 4 9 6 A ° ' 8 6 P L 1 7 Q 1 0 0 = 0 . 6 1 5 A ° - 8 5 P 1 ' 1 5 Q 5 0 0 = 0 . 8 7 4 A a 8 3 P L 1 4 N o r t h w e s t R e g i o n Q 2 = 0 . 2 6 6 A a 9 4 P U 2 Q 5 = 2 . 3 4 A a 8 7 P ° - 7 5 Q I C = 7 . 8 4 A a 8 4 P ° - 5 4 Q 2 5 = 2 3 . 1 A a 8 1 P ° - 4 0 Q 5 0 = 2 5 . 4 A ° - 7 9 P 0 - 4 6 Q 1 0 0 = 3 8 . 9 A ° - 7 4 P 0 - 5 0 Q 5 0 0 = 8 7 . 1 A ° ' 6 7 P 0 - 4 9 S o u t h w e s t R e g i o n Q 2 = 2 . 4 8 A ° - 8 7 ( H E + 1 0 ) - 0 ' 1 9 Q 5 = 2 4 , 8 A ° ' 8 2 ( H E + 1 0 ) - a 1 6 Q 1 0 = 8 1 . 5 A a 7 8 ( H E + 1 0 ) - ° ' 3 2 Q 2 5 = 2 9 7 A ° - 7 2 ( H E + 1 0 ) - ° - 4 9 Q 5 0 = 6 9 5 A O ' 7 0 ( H E + 1 0 ) - ° - 6 2 Q 1 0 0 = 1 , 5 2 3 A ° - 6 8 ( H E + 1 0 ) - 0 ' 7 4 Q 5 0 0 = 7 , 4 6 0 A a 6 4 ( H E + 1 0 ) - ° - 9 9 U p p e r Y e l l o w s t o n e - C e n t r a l M o u n t a i n R e g i o n Q 2 = 0 . 1 7 7 A ° ' 8 5 ( E / 1 0 0 0 ) 3 - 5 7 ( H E + 1 0 ) - 0 ' 5 7 Q 5 = 0 . 9 6 0 A O - 7 9 ( E / 1 0 0 0 ) 3 - 4 4 ( H E + 1 0 ) - ° - 8 2 Q 1 0 = 2 . 7 1 A ° - 7 7 ( E / 1 0 0 0 ) 3 - 3 6 ( H E + 1 0 ) - ° - 9 4 Q 2 5 = 8 . 5 4 A O ' 7 4 ( E / 1 0 0 0 ) 3 - 1 6 ( H E + 1 0 ) - L 0 3 Q 5 0 = 1 9 . 0 A a 7 2 ( E / 1 0 0 0 ) 2 - 9 5 ( H E + 1 0 ) - L 0 5 Q 1 0 0 = 4 1 . 6 A a 7 0 ( E / 1 0 0 0 ) 2 - 7 2 ( H E + 1 0 ) - L 0 7 Q 5 0 0 = 2 0 5 A ° ' 6 5 ( E / 1 0 0 0 ) 2 - 1 7 ( H E + 1 0 ) - L 0 7 R e f e r e n c e O m a n g , R . J . , 1 9 9 2 , A n a l y s i s o f t h e m a g n i t u d e a n d f r e q u e n c y o f f l o o d s a n d t h e p e a k - f l o w g a g i n g n e t w o r k i n M o n - t a n a : U . S . G e o l o g i c a l S u r v e y W a t e r - R e s o u r c e s I n v e s t i - g a t i o n s R e p o r t 9 2 - 4 0 4 8 , 7 0 p . 1 0 2 N a t i o n w i d e S u m m a r y o f U . S , G e o l o g i c a l S u r v e y R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i n g M a g n i t u d e a n d F r e q u e n c y o f F l o o d s f o r U n g a g e d S i t e s , 1 9 9 3 n 0 n e 1 0 4 4 9 ° 4 ; T ; - 4 9 ^ - - ! - ^ . ^ : 1 ^ 0 e ; ! - - d - \ ^ ^ e ^ ^ a y F \ l a s ^ : ^ a ^ v ^ - ^ ^ \ - 7 1 . 1 I ^ • ^ - 7 \ ^ > ^ ^ ^ I L * > L ^ ? - ! - x - ! - - I - t ? ^ V . n ^ ^ t r < h - 1 r a - l r - ^ ' ^ 1 1 ^ . — f • ^ - : - / ' ( ^ ^ 1 * \ < ^ ' u 4 6 1 1 5 0 5 0 J . 1 0 0 M I L E S 0 1 T 5 0 1 0 0 K I L O M E T E R S D i g i t a l b a s e f r o m U . S , G e o l o g i c a l S u r r e y 1 : 2 , 0 0 0 , 0 0 0 , 1 9 7 0 A l t e r s e q u a l - a r e a p r o j e c t i o n b a s e d o n s t a n d a r d p a r a l l e l s 2 9 . 5 a n d 4 5 . 5 d e g r e e s E X P L A N A T I O N R e g i o n a l b o u n d a r y W e s t R e g i o n F i g u r e 1 . F l o o d - f r e q u e n c y r e g i o n m a p f o r M o n t a n a . M O N T A N A 1 0 3 n n 0 n g ° I g 6 i s - 0 s I s I i 0 " ? s a i ^ ^ g 6 1 1 g ° I s I 0 i . i s ; i 2 s j 2 d l i c o I I & & p ~ j I j 0 2 • 5 ^ . I I I I ? I p ^ s £ I I . 1 ^ 1 ^ ^ I l l I I S S 3 6 1 - 1 1 s C N " ° s g § i 3 I I I " o i f s a / n R A I N I - A L L F R : J E N C Y 2 5 Y E A R Y E A R 1 0 Y E A R 2 5 Y E A R 5 0 Y E A R 1 0 0 Y E A R / ( K = ) 0 x s i n L J I ( J l ^ i n < I < a : c r ^ v i t — f \ \ ^ ^ < » » • - ~ X = H R ~ 1 Y = 1 N / H R Y = 0 . 3 6 X Y = 0 . 5 2 X Y = 0 . € 4 X ' Y = 0 . 7 8 ) C Y = 0 . 9 2 X - . 6 0 - . 6 4 , 6 5 - . 6 4 . 6 6 Y = 1 . 0 I X - . 6 7 6 0 0 E : 0 1 0 4 I " 1 0 I T N - \ z o > - 3 3 0 u a c - J - " 2 2 ^ S l e c c \ < r 0 0 5 1 0 1 5 2 0 2 5 3 0 4 0 5 0 D U R A T I O N I N M I N U T E S 6 0 7 0 i i a - ' - • ^ a a s t ! ' ( l a ' > • R A I N F A L L I N T E N S I T Y - D U R A T I O N C U R V E S B O Z E M A N , M O N T A N A B A S E D O N N O A A A T L A S 2 , V O L . f F I G U R E 2 3 ' " I , ' l I J ! ' I M 1 1 f l l I I • ' s ' . I » ' I ^ • ^ M : M 8 1 B S ? ! l ^ : i % • s ' . s ® • ^ m l i ; ; ^ i 9 - : • : ^ : a : ' : , ^ y - K : ' u ^ : ' , . " ' - ' . ^ ^ - • ; : . ^ ^ ; . - . s , ^ . n . i - t } j ! I I I • ^ I i ^ ^ O J ( \ J U J - < r < o h - U 3 U 3 U 3 X X X X X X u ? r j < g - 0 3 o ' 3 - i n ( £ ) U 5 U 3 > D : = 1 e c c o 0 x O J — k 0 I < - U 3 0 I D Q : 0 = d ) L J I ^ d - 0 0 0 0 ? - I ] I I I I 1 1 I I I I I I I I 0 > - x > - > - > - > - ? - > - Q . i n , t O 1 £ = ) 0 5 - a : i r o : a : c r i r < < < < < • > > - > - > u U J N < L L . = ) 0 c ? o i p o p r d i n o - C L < e c e c = ) Q m 7 t D 7 / , i w a f l [ 7 r o 1 7 0 / 1 - T n j > 0 1 - 3 T 1 s j I z s y v s / - N I A 3 N 3 n o 3 y ^ " n v j N i v y s s z 0 0 ^ . 0 0 0 y n o H y 3 c f S B H O N I N I A I I S N ^ I N I i - i v j N i v y l l j e c ^ r r 3 0 C d i Z 0 > C M V ] < < t < t < 0 z c n 0 u Q > U J Q : < n < Z 3 0 z 0 . ^ < h - < < a : h - Z ) Q 0 > - h - c n < 2 u L J h - ( M S = 0 0 3 - J J < u - z < C C I s t ^ - M f . ^ 3 ' ^ I ! ^ f s ' I B 0 T I M E O F C O N C E N T R A T I O N C A L C U L A 1 l O N S B y P a u l S a n f o r d D e c e m b e r , 2 0 0 1 A . O V E R L A N D T I M E O F C O N C E N T R A T I O N 1 . S C S C U R V E N U M B E R M E T H O D s e e " B a s i n C h a r a c t e r i s t i c s " t a b f o r c a l c u l a t i o n O v e r l a n d t ^ : 2 . F I G U R E 7 - 1 O F M D T H Y D R O L O G Y M A N U A L 4 . 0 3 4 h o u r s s l o p e : 1 . 4 % c o v e r : s h o r t g r a s s p a s t u r e & l a w n s v e l o c i t y : 0 . 8 5 f t / s O v e r l a n d F l o w L e n g t h : 1 2 , 5 0 0 f e e t O v e r l a n d t < : : 4 . 0 8 5 h o u r s 3 . F I G U R E 7 - 2 O F M D T H Y D R O L O G Y M A N U A L ( s e e a l s o F i g u r e 2 2 o f B o z e m a n S t o r m w a t e r M a s t e r P l a n , 1 9 8 2 ) O v e r l a n d F l o w L e n g t h : s l o p e : c : O v e r l a n d t c : 1 2 , 5 0 0 f e e t 1 . 4 % 0 . 3 N A m i n u t e s ( n o t v a l i d f o r o v e r l a n d f l o w l e n g h > 1 2 0 0 ) 4 . M D T H Y D R O L O G Y M A N U A L , P A G E 7 - 0 - 2 S H E E T F L O W ( T ( = [ 0 . 0 0 7 ( n L ) ° - s / ( P 2 ° ' 5 s ° ' 4 ) ] S h e e t F l o w L e n g t h , L : n : s l o p e : S H A L L O W C O N C E N T R A T E D F L O W u n p a v e d : V = 1 6 . 1 3 4 5 ( s ) ° , ) ° ' 5 ^ 0 . 5 u n p a v e d o r p a v e d ? s l o p e : a v e r a g e v e l o c i t y : O v e r l a n d F l o w L e n g t h : O v e r l a n d t c : T o t a l O v e r l a n d t c : p a v e d : V = 2 0 . 3 2 8 2 ( s ) u u n p a v e d 3 0 0 f e e t ( m a x o f 3 0 0 f e e t ) 0 . 1 5 f r o m T a b l e D - 1 1 . 2 i n c h e s ( 2 - y e a r 2 4 - h o u r r a i n f a l l ) 1 . 4 % 0 . 7 4 1 h o u r s ( t r a v e l t i m e ) f t / s f t / s 1 . 4 % 1 . 9 1 f t / s 1 2 , 2 0 0 f e e t 1 . 7 7 5 h o u r s 2 . 5 1 6 h o u r s B . C H A N N E L T I M E O F C O N C E N T R A T I O N 1 . M A N N I N G ' S E Q U A T I O N C h a n n e l F l o w L e n g t h : v e l o c i t y : 9 , 9 0 0 f e e t 4 . 0 0 f t / s ( f r o m o t h e r p r o g r a m ) C h a n n e l t , ; : 0 . 6 8 7 5 h o u r s ? I g s g I I I n ( n I ^ I I " § ? I I I s s g i t ° 1 § ( 0 u I ' I I 0 s - g I f l t 8 A 0 1 : s S s ^ l l 1 0 i § y D 2 ^ s s 5 " S J g B I . p j l t t ' I I I 1 1 ! j j g I I I I I 8 J p s L U S I ? 3 s | U l & s 6 s I I l l s s I f u s ^ y i i l s s i ? 1 | 5 s | S a g I I I 6 s & I I I ; I s s 5 £ t t ^ I - N I S 9 l l l ! ! i i l i ^ s s I s ^ ^ l V ) § s ( 0 0 ^ ^ I I l i n I s r i . j - I I P R E C I P I T A T I O N D A T A ' ) B y P a u l S a n f o r d D e c e m b e r , 2 0 0 1 F r o m N O A A A t l a s 2 , 1 9 7 3 D u r a t i o n 2 - y r 5 - y r 6 h o u r 2 4 h o u r P 6 / P 2 4 S t o r m T y p e 0 . 7 1 . 2 0 . 5 8 3 1 0 - y r 2 5 - y r 5 0 - y r 1 0 0 - y r I 0 . 9 1 . 6 0 . 5 6 3 I 1 . 1 1 . 9 0 . 5 7 9 I 1 . 4 2 . 3 0 . 6 0 9 1 . 5 2 . 6 0 . 5 7 7 I 1 . 6 2 . 8 0 . 5 7 1 B o z e m a n ( 6 M i l e s W e s t ) R a i n f a l l I n t e n s i t i e s f r o m M D T 1 - h r p r e c i p ( i n . ) 2 - y r 0 . 3 7 5 - y r 0 . 5 0 1 0 - y r 0 . 5 8 2 5 - y r 0 . 7 0 5 0 - y r 0 . 8 0 1 0 0 - y r 0 . 8 9 E s t i m a t e s h o r t e r d u r a t i o n i n t e n s i t i e s ( i n / h r ) f r o m T a b l e B - 2 p a g e 7 - B - 2 i n M D T H y d r o l o g y C h a p t e r D u r a t i o n ( h r s ) ( m i n ) 2 - y r s s a 0 . 1 0 1 0 - y r 2 5 - y r 5 0 - y r 1 0 0 - y r 6 . 0 0 1 . 6 4 2 . 2 2 2 . 5 8 3 . 1 1 3 . 5 5 3 . 9 5 ; ; ; u & ^ ^ ^ ^ ^ i ^ J t g ^ . . 3 S l ; ^ ^ K E S £ , £ . S ^ ^ £ . ^ l ^ ^ S ; ^ . f i ^ ^ i ^ ^ . r i ^ ^ f a A . a S S ^ S . ^ i l 0 . 2 0 1 2 . 0 0 1 . 1 7 1 . 5 8 1 . 8 3 2 . 2 1 2 . 5 3 2 . 8 1 0 . 3 0 1 8 . 0 0 0 . 9 5 1 . 2 9 1 . 5 0 1 . 8 1 2 . 0 6 2 . 3 0 0 . 4 0 2 4 . 0 0 0 . 7 9 1 . 0 7 1 . 2 4 1 . 5 0 0 . 6 0 3 6 . 0 0 0 . 5 8 0 . 7 8 0 . 9 0 1 . 0 9 0 . 7 0 4 2 . 0 0 0 . 5 3 0 . 7 1 0 . 8 2 0 . 9 9 0 . 8 0 4 8 . 0 0 0 . 4 7 0 . 6 4 0 . 7 4 0 . 9 0 0 . 9 0 5 4 . 0 0 0 . 4 2 0 . 5 7 0 . 6 6 0 . 8 0 1 . 7 1 1 . 9 0 i S f f l l u A l ' ; ; ) ^ " j - i ) t , . . ' . u . ' ; ' ' : ; . n " ; ; . 3 W K l a M ; « ™ g S . ; ^ 3 f t ! ; i £ < > ; ' ; . a i g i ^ ; 1 . 2 5 1 . 1 4 1 . 0 2 0 . 9 1 1 . 3 9 1 . 2 6 1 . 1 4 1 . 0 1 I D F E q u a t i o n s f r o m B o z e m a n S t o r m w a t e r M a s t e r P l a n f o r C i t y o f B o z e m a n , M a r c h 1 9 8 2 n g e n e r a l e q u a t i o n : i = a / ( b + D ) ' R a i n f a l l F r e q u e n c y ( y e a r s ) a b n 2 0 . 3 6 0 . 0 0 0 . 6 0 5 0 . 5 2 0 . 0 0 0 . 6 4 1 0 0 . 6 4 0 . 0 0 0 . 6 5 2 5 0 . 7 8 0 . 0 0 0 . 6 4 5 0 0 . 9 2 0 . 0 0 0 . 6 6 1 0 0 1 . 0 1 0 . 0 0 0 . 6 7 n S C S C u r v e N u m b e r M e t h o d ( c o n t i n u e d ) r I < R u n o f f F a c t o r ( c o n t i n u e d ) 2 C r o p r e s i d u e c o v e r a p p l i e s o n l y i f r e s i d u e i s o n a t l e a s t 5 % o f t h e s u r f a c e t h r o u g h o u t t h e y e a r . H y d r o l o g i c c o n d i t i o n i s b a s e d o n a c o m b i n a t i o n o f f a c t o r s t h a t a f f e c t i n f i l t r a t i o n a n d r u n o f f , i n c l u d i n g ( a ) d e n s i t y a n d c a n o p y o f v e g e t a t i v e a r e a s , ( b ) a m o u n t o f y e a r - r o u n d c o v e r , ( c ) a m o u n t o f g r a s s o r c l o s e d - s e e d e d l e g u m e s m r o t a t i o i i s , ( d ) p e r c e n t o f r e s i d u e c o v e r o n t h e l a n d s u r f a c e ( g o o d > 2 0 % ) , a n d ( e ) d e g r e e o f r o u g h n e s s . P o o r : F a c t o r s i m p a i r i n f i l t r a t i o n a n d t e n d t o i n c r e a s e r u n o f f . G o o d : F a c t o r s e n c o u r a g e a v e r a g e a n d b e t t e r t h a n a v e r a g e i n f i l t r a - t i o n a n d t e n d t o d e c r e a s e m n o f f . R o w c r o p s a r e t y p i c a l l y s u g a r b e e t s a n d c o m , w h e r e a s w h e a t , o a t s a n d b a r l e y w o u l d b e c l a s s i f i e d a s s m a l l g r a i n . T a b l e 7 - 1 0 O t h e r A g r i c u l t u r a l L a n d s 1 C o v e r d e s c r i p t i o n C u r v e n u m b e r s f o r h y d r o l o g i c s o i l g r o u p C o v e r t y p e H y d r o l o g i c c o n d i t i o n A B c P a s t u r e , g r a s s l a n d , o r P o o r r a n g e - c o n t i n u o u s f o r a g e F a i r f o r g r a z i n g ^ G o o d M e a d o w - c o n t i n u o u s g r a s s , - p r o t e c t e d f r o m g r a z i n g a n d g e n e r a l l y m o w e d f o r h a y B r u s h - b m s h - w e e d - g r a s s P o o r m i x t u r e w i t h b r u s h t h e F a i r m a j o r e l e m e n t 3 G o o d W o o d s - g r a s s c o m b i n a t i o n P o o r ( o r c h a r d o r t r e e f a r m ) F a i r G o o d W o o d s 6 P o o r F a i r G o o d F a r m s t e a d s - b u i l d i n g s , l a n e s , d r i v e w a y s , a n d s u r r o u n d i n g l o t s 6 8 4 9 3 9 3 0 4 8 3 5 4 3 0 5 7 4 3 3 2 4 5 3 6 4 3 0 5 9 7 9 6 9 6 1 5 8 6 7 5 6 4 8 7 3 6 5 5 8 6 6 6 0 5 5 7 4 8 6 7 9 7 4 7 1 7 7 7 0 6 5 8 2 7 6 7 2 7 7 7 3 7 0 8 2 D 8 9 8 4 8 0 7 8 8 3 7 7 7 3 8 6 8 2 7 9 8 3 7 9 7 7 8 6 t ' , 7 - 6 6 ^ S C S C u r v e N u m b e r M e t h o d ( c o n t i n u e d ) r I < R u n o f f F a c t o r ( c o n t i n u e d ) T h e f o l l o w i n g p a g e s g i v e a s e r i e s o f t a b l e s r e l a t e d t o r u n o f f f a c t o r s . T h e f i r s t t a b l e s ( T a b l e s 7 - 8 - 7 - 1 1 ) g i v e s c u r v e n u m b e r s f o r v a r i o u s l a n d u s e s . T h e s e t a b l e s a r e b a s e d o n a n a v e r a g e a n t e c e d e n t m o i s t u r e c o n d i t i o n i . e . , s o i l s t h a t a r e n e i t h e r v e r y w e t n o r v e r y d r y w h e n t h e d e s i g n s t o n n b e g i i i s . C u r v e n u m b e r s s h o u l d b e s e l e c t e d o n l y a f t e r a f i e l d i n s p e c t i o n o f t h e w a t e r s h e d a n d a r e v i e w o f z o n i n g a n d s o i l m a p s . T a b l e 7 - 1 2 g i v e s c o n v e r s i o n f a c t o r s t o c o n v e r t a v e r a g e c u r v e n u m b e r s t o w e t a n d d r y c u r v e n u m b e r s . T a b l e 7 - 1 3 g i v e s t h e a n t e c e - d e n t c o n d i t i o n s f o r t h e t h r e e c l a s s i f i c a t i o n s . T a b l e 7 - 8 R u n o f f C u r v e N u m b e r s 1 U r b a n A r e a s C o v e r d e s c r i p t i o n C u r v e n u m b e r s f o r h y d r o l o g i c s o i l g r o u p s C o v e r t y p e a n d h v d r o l o e i c c o n d i t i o n A v e r a g e p e r c e n t A i m p e r v i o u s a r e a B c D ( I O p e n s p a c e ( l a w n s , p a r k s , g o l f c o u r s e s , c e m e t e r i e s , e t c . ) 3 P o o r c o n d i t i o n - ( g r a s s c o v e r < 5 0 % ) F a i r c o n d i t i o n ( g r a s s c o v e r 5 0 % t o 7 5 % ) G o o d c o n d i t i o n ( g r a s s c o v e r > 7 5 % ) I m p e r v i o u s a r e a s : P a v e d p a r k i n g l o t s , r o o f s , d r i v e w a y s , e t c . ( e x c l u d i n g r i g h t - o f - w a y ) S t r e e t s a n d r o a d s : P a v e d ; c u r b s a n d s t o r m d r a i n s ( e x c l u d i n g r i g h t - o f - w a y ) P a v e d ; o p e n d i t c h e s ( i n c l u d i n g r i g h t - o f - w a y ) G r a v e l ( i n c l u d i n g r i g h t - o f - w a y ) D i r t ( i n c l u d i n g r i g h t - o f - w a y ) 6 8 4 9 3 9 8 3 7 6 7 2 7 9 6 9 6 1 8 6 8 9 7 9 7 4 8 4 8 0 9 8 9 8 9 8 9 8 9 8 9 8 9 8 9 8 8 9 8 5 8 2 9 2 8 9 8 7 9 3 9 1 8 9 7 - 6 3 n n u i i y s i s . C u l v e r t C o n v e y i n g B a x t e r C r e e k U n d e r H u S n e ( J n s r F P ^ - 2 ^ 2 ^ ^ ^ • S T - A ^ O ^ . - ^ Z - 0 B A ' < - £ R C ^ C £ | < 3 / 3 i | ^ 4 ^ L T ~ — • - — ' - , C c - C ' ^ - i E y . . ~ s t ^ ; c ^ ; ' . ' • ' • , < ' . . - ~ v ' ^ v - - ^ — ' . ; n . . . " _ ' ' , • 2 . . , 1 - ^ ^ ^ - I 5 - < - / • ^ ^ - ~ - ; ^ ' c i ^ ! P . ( ^ A F ^ . ^ . ! — • - ( - - ^ | 2 . 0 ^ ^ - T s ' _ ^ \ - . . ' " ' • ^ J ^ - • ' — - ^ ^ ^ ^ < ^ r r ' - . : ~ 1 ' ' ^ s ' ^ j s 2 , 5 ' c L & r ^ r = ; ^ ^ - " i S - . ' - " • " - ~ ~ . i ^ > ^ ' & - < V o ^ s d ' - J . . ' d - - s _ 4 ' . c ~ ' ' A J ^ ' S ' i ^ S - ^ L . Z ^ O - ' 6 0 A - ! . 3 ' , . ' ? / ' — T T ^ ^ - i L D < = ^ P l o ' t ' 1 O s ^ Q . ] O U 8 0 ° \ 0 c ^ s ^ s j C . l ^ _ a , v , \ _ 2 , ' - c o - a a - ' ^ - ' 4 - - i " ^ ^ S A ~ p ' r o p ' = ' < - ' - o i . ' . ' J • . d - 2 - ^ - i - ^ — ^ ~ " 1 ^ ' • + " L - ^ - T , o / - - i r ' / - - - ~ . ' . . . ^ ~ " • J ' ^ - ^ a . . . r ^ j z . ^ , o c _ < = ^ - - ^ ~ c ^ - / - \ - ' ' - T ^ v C s i ^ - i r ' V ' . S ' l r e ^ p ^ - ^ \ < - ^ p ^ i p e c o / \ ^ i ' c L L ^ c L ' 3 ' - ~ - L O • Y - ^ . O - ^ T C - ^ O ' - ^ - ( L £ J ^ - - ( - ( . O l ^ ) ^ ' . ' F ^ J ^ £ 2 t - e ' ^ j O ^ H c ' - ' " ' - ^ ^ - + ' ^ - ^ l ^ l i l \ ' ^ A _ ^ O ' - / ^ 0 ' / & ^ ' J - O r P T I ^ ' C ^ - f r ' f o ^ j J i " > ^ A ^ L ; - ' - - ^ / S Z S , I - r o ^ 6 Z . 3 . Q , S ^ " f t ^ P Q ^ S ' H ' ' ' c - 5 ^ ^ ) ' ' / / ' r - ^ ^ ' c . ^ - e ' ^ ' ^ ^ ^ Q - ' S 0 ~ f " k f ~ S - - ^ L . ' / - s ^ i - ^ L < - ' T r ' p r - A p ^ ^ r ^ > - ^ j < ? - ^ . f s - s - - " - . - . ^ - X L ^ ^ \ - J 3 ^ ^ - i ^ X l , ' S ~ i ~ i " ^ ' - a c ' L J - ~ r ! - £ - ' ^ ^ V A ' - ^ 2 - ~ ^ J b ^ , r C ^ ^ ^ / r ^ S ( o / ^ ? ' y ) ' b a ' T 5 . / . . , . . . ^ ^ _ 2 - - ± f - . - ° - " T ^ = Z . O L C r + ^ ' 8 ' ) ; - 1 ^ = ' ^ — ^ — - 5 , - ^ 8 o C - < $ - ; s ^ 1 s b . ' - . ^ 7 . ' - J . ^ ' ' ' 2 ' / - , ^ \ / ' f l - 3 / . ^ - . 2 . S 5 - ^ s l : . ^ ( - ^ - / 2 , o V ^ / ^ , 5 f v ^ - / . 3 3 / , ^ 0 - 3 - ^ , y ^ ^ - ^ . X ^ ^ / . 7 £ ) c ^ / D , ^ ^ - 3 I / . 2 2 ^ ^ 3 D . 7 ^ , s ) ^ % . . r - ) - 3 6 3 ( ^ ^ = - / 3 , 5 g r ^ . + C ^ ^ - ^ L ^ - / ' ? . < c ' = ^ - i - ^ I S S - z ^ . " ~ , ' £ 5 / J ^ h o ^ - ^ ^ A < a ^ ^ & / ' & ; / • ' ^ . y & t ^ t ~ T ^ I n "}0 ?)<noN.»ssr.s^^-^sr^^-^ — | S E C T I U < 7 M H t f s s - s - ^ - ^ ^ s . ' s ^ t - L S - ^ - s : ^ . ' ^ • . ^ - j = ^ £ A - - s s - ^ s ; t ; ^ > * s - = ^ % ^ ^ ^ ^ MONTANA DEPARTMENT OF HIGHWAYSTON SKETCH uurr<SURVEY DATA FOR DESIGd OF WATBWAYS^= c Snm ma g^<TEt-C^- to. 2533^'_^ ?^^STD*:IE3£33tND. ^ a ^ r-, s Sinwlt^ /U @ ^ s 5 FOR DRAtUGES OF ONE SQUARE MU ORLABGS1 A AU- WB6A'nON.flfcesnw. icmjcnoNsPT^ ~~^3)M1^x*zt1my,rflKrii»*rti ntaf » •<—KM* rffthttl ••to. I* •^k> <—1^ ^••111to4&•X ^ * f = ) •«l«—t. <«>•>•»>-<<r- ;o/ sc*»«< i n t r - S ' SECTION 6 CROSSfrtrfui—r'n' rvhrL -m.BitC^^=^^^^T?££aS=-ir\"?2StBB;al—--»-- 5 l - ; = ; S . - S - . r = ^ ^ • * h — tn •• XUU.hAA h to*. •< dd•»«|iirii<«Ari»<iTiiii^ho»<««*7.«&^«ato inirfrwy»*fcCBU.K*«r-)B' » U N d M _ _ l _ j _ * ^ ••••—(ylitefal.NS?N3^Bh«5 > ^ S S ^ « ( S ' S £ < 5 » J I ? d X T t ^ .,«.— Bhd>h<k»bMto<Nrt_»ah>»*rt»l«rit.ft^rt^»rf«*N^r»h«aNh—«^»N it d — i b r » * Saction 1 WATBSHH) DATA(Mi»U<c th. • .1)^1 0 ,*to.D .N—raOhrD .(^^•(1fiiNfti .>faf a .>«• aa*rDte.Oifi—D .0 .0 .S»k«»< D•••to *•..»—»• H SECTION 2 EXISIXG STRUCTURE.^->._4^_id—.<-0" .^. CM^r—- C.D<->t> ,1^« 7£. •U^clfIB.tfCIBNLsr-totor3&z2SECIBN 3 BfOSUN AND GBXOGY tWTA.•d—oaii a.a .•<• a ..to— a • *• »u 4 % ) ( tvfc.)h-igSECTION 4 IRnGAIIW DATAN—Oart ' ' ' ! ' ' 'nnotd,Ak.T.d*t»hod •aadnlCOMMENTSR t ! ^ F J ' " - ' • " S ^ - " — • — ' • — • » . b . < - » ' ° - ? ~ " ~ - — r l — » w y r i i B ^ . c h K l k — Q . B 5 » i B i ^ B ^ r » ] < j ^ | ~ , , , ^ B I A — r t » » ^ ( . f ) I n * : ^ ' — f i i - r ' m i i i j i i d » M i « 5 y f c « i ^ u « • ( ^ • r - w - . r - a r . a - r - a r d ^ m f c v o n S E C T O N 8 P L A N A!lQ£o&& seCT'OA^^ ^1<2£' A..077E-& ^. o o i f c / A / f . . C > o < ^ ^ S T ^ S M ^ • - ? - E N - D A ' E : 0 2 - 3 1 - 1 = c ^ S - r ^ Z y a . . ^ - 7 - . o ^ R E T T I P E : - ; 3 l ; = ! ^ < S — - - ^ ^ t o ^ - ' , ^ . f - / i . p F I L E D A T E : 0 3 - 3 1 - 1 9 ^ ; ; _ ; ? „ ; ? ! ; ; ; - l C 2 i ; " 2 : " ^ ~ - C L L I . ' E : : A c l - L ' ; ^ ! : : - ! ^ . ^ ^ : C ? . ^ - ; S ; - E J " " A C U L V : ^ 5 P : . ^ r £ P I " L , I " L : : ^ L i ~ ; U 7 L : T • : J L ' , ; l : = : T i r A ^ E L E E L E V , : L £ V . _ E M S T H ! S H A P E : " - ; ; : T ] ' " u - ^ ; ; , ^ V ^ F I E E " A N N I N E I N L E T . F T : - . T : - P E ^ ; 5 . = 0 ' ~ : : M \ : ; 5 2 ; , L ' O 3 , : ) 0 . ; 2 - : C O i ^ E N T I Q N - L . 3 ] . 3 = - A R Y O F C L i i y E S T F L Q N 5 f j : C F S ) F I L E ; e ^ C 2 0 3 D A T E ; 0 3 - 3 1 - 1 ? C 4 - E V ; ; T ) 2 6 . 2 0 : 7 . 4 9 2 9 , 0 " 2 8 , 4 s : ^ , 5 5 2 9 , i 8 2 5 > : 2 2 U , 5 C ^ : 1 3 G , J s T O T " L 0 u I S 3 o 4 5 " 4 . . . ; - ^ i _ , - / . i . 7 0 ^ 1 0 9 I S 3 6 ^ £ 4 = 3 ; ! J . - 3 0 0 0 0 0 . * . 0 0 3 0 0 ' . Q 0 Q 0 1 0 Q Q g 0 • • • : . ) . - . ' . ; 0 ; ; 0 0 0 0 ! ; . . . ' 6 R O f t D N f i Y I T R u Q 1 0 1 Q 1 0 0 , • • , 0 0 o 0 ' . ' 0 1 : ; 1 Q 1 0 2 : - ' 1 ; i ^ • ; • 1 0 Q v E a T C P P I N u G . ' i / . ' & E . ^ - : ' ^ - F A . 2 . 0 ^ 1 ^ ^ 1 . 3 S U i - i ^ R V O F I T E R A T I V E S O L U T I O N E R R O R S F I L E ; B 4 C 2 C 3 D A T E S 0 3 - 3 i - 1 9 ° 4 u - E A D E L £ - F ~ 2 6 . : 0 2 " 7 . 4 s 2 8 , 0 4 2 S . 4 S 2 ° . I S 2 9 . 5 2 2 9 . 3 0 3 0 . i l 3 0 . 5 c 3 0 . o s H E ^ D i W ^ \ ? ~ ^ 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 , 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 T O T ^ L ? : L o y f c r s s , • ; 9 • - ; ^ 3 6 4 ; 5 4 £ . 3 - ; - - s o = 0 = L O W E F R D R ( C ; 5 ) 0 0 : - , 0 . . - . ; • - . ; 0 0 0 y • . F L C y E W O R 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 O . Q C 0 . 0 0 0 , 0 0 0 = 0 0 0 . 0 0 0 . 0 0 : . 1 > T O L E R A N C E ( F T ) ' : 0 . 0 1 0 ^ ; : > T O L E R A N C E ( S ; : 1 , 0 0 0 i ^ ^ • t ~ D ! - ' " : : • ' . i - 2 ; - 1 G ; : - ; - S : r : - - : i E : 1 ^ 3 1 ; ; 5 F : - E N - " E ; : ; ~ E ; - 2 - 3 1 - 1 s 0 " ' ; ' , ' - ^ R P A N L : ; : J R ! ; E = C F : . : J . . : E ^ - E - D - I N L E T O U T L E T - A ; 3 E N ? - T E R C 3 N 7 R 2 L C Q N ' ^ O L ' : L O N N O R R - L C R : " U U T L E T - : L ^ A T : - O i . E . E V . D E P T H D E P T H H F E C E P T H D E P - " V E L . ^ E P T H ^ L . D E P T H , r t , ^ - r : . ; f t i < F 4 ; ' - ? - ' . : £ - ^ ( 7 2 £ ; . ' - > - i ^ 4 5 5 4 5 0 " 0 : - . 4 9 2 S . 0 4 2 6 . 4 6 2 9 . 3 5 2 ? . 1 3 2 9 . 5 2 2 9 . 3 0 3 0 . 1 1 3 C , J 6 3 0 . 6 f c Q . 0 0 1 , 1 0 = ' : : 2 . 0 1 2 . 3 3 2 . 7 0 3 . 1 i 0 3 . 2 7 3 . 5 3 J . 7 5 4 . 0 3 0 , 0 0 0 - N F 1 . : ° 2 - N 2 c 1 = ^ 2 - K = 2 . 2 5 2 - M ; c 2 > 6 5 2 - H 2 C 2 . " S 2 - N 2 c 2 - R 2 C 2 - M 2 s 3 . 3 2 3 . 6 0 3 . 9 1 2 - N 2 ; 2 - S 2 c 4 . 1 6 4 . - 2 - M 2 ; c . o o i . 0 i L 5 : i . S S • " . • - " ; - A - E - - 2 , 5 2 2 , 8 1 3 , 1 1 3 . 4 : 3 . 7 3 4 . 2 0 : ; ? ' ; • ; i . 4 3 1 . 6 6 1 , 3 6 2 . 0 f e 2 . 2 2 2 , 3 ° 2 . 5 3 : , 6 9 0 , 0 0 4 . ^ : . 2 £ o . " g 1 = 5 . S O ^ , 3 2 6 . 7 3 7 = 0 i ? 7 . 4 7 7 . 7 7 3 , 0 3 3 . 3 9 1 , 4 3 l . o b l . 8 6 2 . 0 f c 2 . 2 2 2 . 5 ° 2 . 5 5 2 . 6 3 . " • - i 2 . 3 3 3 . 9 9 4 . 3 4 4 . 6 3 4 . 8 S 5 . 0 9 = . " s 5 , 4 4 5 . 6 2 - 2 ^ 0 ; - ! - L ; : 2 - 1 . 4 3 - l . : f c - 1 . 1 2 - o . = c - 0 , S 7 - 0 . 7 6 - 0 . 2 6 - 0 . 5 6 £ - , : - : l s t T S = S ^ • = ^ • 2 6 . 2 0 f : . E l . i n l i - - n r o i t i n v s : " t • 0 . 0 0 f t o L j - : i a t i n v e r t i : l = i ^ l s t c ' s s t ; 5 , U O f t 0 . 0 0 f - : — 5 I T E D A T A — - C i J l V E R " I N U E - T * " * * — - — I : v L L - 3 T " T I G N ; F T ; ^ , : - ' ; I N L E T E L E V A T I O N i F T ) . 2 = . 2 0 ^ - - E T E T f i ' I O N ( F T ) ' = . » 3 U T L . E T E L E V A T I O h ( F T ) : 3 , = C N l j W B c R C F B A R R E L b 1 5 L O F E ( V - T / H - f ) 0 , 0 0 3 9 D I V E R T - E 9 G T 1 - " L G h G ; L G ^ E T ; ' 6 . 0 0 I - - ^ T C U L V E R T D A T A S U N M f i R Y s — — - * " " * * — — * — B A R R E L S H A P E B A R R E L D I A M E T E R B A R R E L t ^ T E R I A L B A R R E L a A N N I N 5 ; 3 N I N L E T T Y P E I N L E " E D G E " N D « A L L : ? < L £ ~ D £ P R E £ S : Q N C I R C U L A R 5 . 0 0 F T C O R R U 5 A T E D S T E E L 0 . 0 2 4 C O N V E N T I O N A L M I ' E R E D T O C 2 N C O R M r - Q N E ' U S L O P E u 0 I j : ' ^ T S A T E ? . • 3 - 3 1 - 1 ? ^ . - K W ~ - I H E ; l - ; - ' . ^ ; ' ; L E J i M ~ E ; L : 3 - 3 2 - - ; ! - ' i ; T - £ - ^ ; 5 ^ C 2 0 J f ~ ^ - ~ A ' ^ — - ^ ; _ ^ c ^ ^ ^ ^ F Q s s s i C H j N ^ - * — * — ^ ^ - c " . . ^ j - ; T n 5 I D E S L O P E - / v ! ; ( ; ! ; ' : " - . " : " N L ? L 2 ^ E ' , ; . ' ' - ; ; : T : r - ' : T ^ , . . . ^ ^ i ^ e ' i n { : o i - ! j , i i ^ . " ^ ; - ^ E L : N i . E ; - r E . i ^ T ; 2 , , " . . - ^ : ^ W T • € . ! U U T - E - i N ^ E R - 5 L £ V A - : C h ^ . y - . - . ^ T F Q R M F L O . R f t T I N S C U R V E F O R D G ^ S T R E A ^ C H A N N E L I F L C N f C F 5 j s ^ o 9 . M 1 3 . O Q 2 T . O C 3 6 . 0 0 4 5 . 0 0 5 4 . 0 0 6 3 , 5 C " 2 . 0 0 5 0 . 0 0 9 0 . 3 0 " j . S . E . ( F T ) 2 3 . 5 0 2 4 . 0 3 2 4 . 2 9 2 4 . 4 7 2 4 . 6 4 2 4 . 7 8 2 4 . 9 1 2 5 . 0 3 : 5 . 1 4 2 5 . 2 4 ^ . y • " = • F R Q U D E N U M B E R 0 , 0 0 0 0 . 6 8 8 0 . 7 0 5 0 . 7 1 3 0 . 7 1 7 0 . 7 : 0 0 . 7 2 3 0 . 7 2 5 0 . 7 : - 0 . 7 2 3 Q . 7 3 0 D E P T H ( F 7 ) 0 . 0 0 0 . 5 3 0 . 7 b C , = 7 1 . 1 4 1 . 2 8 ' ^ . - ' 1 1 = : • - : . . . ^ 1 . 7 4 1 . 8 - i v E L . f F P S ; 0 . 0 0 2 , 5 3 3 , ^ 3 3 . " 4 . 3 4 4 ^ 3 ^ 3 8 5 . 0 C = — c • - • ; — . 5 , ^ 4 5 , o 2 S H E A R ( P S F ) 0 . 0 0 0 . 3 3 J . 4 U . ^ = 1 0 . 7 1 G = 3 0 0 . 3 8 ^ , C 6 : j 2 1 . O S 1 . 1 ; R O f i G ^ ' Q V E R T O P F i N C D r t ^ - O A D W i S Y 5 [ j f i : » C £ c r f S A N K S E N r T O P W I D 1 - H ; = • ! C S £ = T L E N G T H ( F T ) ^ E S T O P P I S E C R E S T E L E W - I O N ( F T ) ; " " V E . 2 0 . ^ 5 0 . 0 0 3 1 , ~ 0 I I ! ^ : . R t N T D t i T E : 0 3 - 3 1 - l ^ - s S ~ T ^ 2 0 3 - t Z ~ ^ . : F S ^ T T . ' E ; 1 ^ 2 5 : ^ 5 ^ ' ^ - ^ f C I L £ D f r ^ ; , . 3 - : l - l 9 " i : ^ ^ E : D ^ ; L ' 3 = - - " ; : ; " - - - • • : U 5 - ; ; . - . . ; ; " E D - ~ ^ — E . ; I H : ' E - - L . : : . L £ 7 : M - £ - Q U T L E - C U L V E R T : S A - R E - i E L E 1 . . E L E V , L E N G T H ; E H f t P E F ^ . F T ) ; ! < A T E ? ' I A L S P " N = I 3 E M - I - I N I N G I N L E T \ H } - T Y ? E z c . 0 ' , c < r ; , 2 i 2 3 . 1 C - ' 1 0 0 . Q 5 . 1 H i . " ^ . 5 0 - ^ ~ . : Q i w £ 9 - - . ; N A - 4 : : - S A R Y O F C U L V E R T F L O W S ; C ? 5 i / - ! : I L £ ; B ^ 2 Q 3 P - E V ( F T ; 2 = , 2 ' : " - . ' - 1 2 S , ; 4 : 8 . ? 1 ; ? . ; r 2 s , 5 5 : : ; , = 4 . ; c . i . , - 1 . ! . - , . 5 0 - O T A L 0 ! S - - - ' 3 6 4 5 s - c . . - — 5 0 0 ; : ; I S - : - T 2 . - ^ 3 0 ^ : J ; - - 2 • : / i j 0 . ; ^ • ; ; • • - • ' . . . : : ; y i ; < ; ' . . ^ ; ' • j ; ; u i ; D A T E : 0 5 - 3 1 - l c c : ^ a R O A D W " ? I T R 0 0 1 0 0 i 0 0 . ' , : . ; ' • • J 1 0 1 ^ r 1 y 1 i i • [ ; 1 ^ ^ 0 O V E ? - U F P I W 3 u i O F I T E R A T I V E S D L U T I O N E R R O R S F I L E : S 4 C 2 0 5 F D A T E : 0 3 - 3 1 - 1 9 9 4 u H E A D E i E v t F i ; ; , 2 0 " . ^ : 7 . £ t f 2 5 . 1 ^ 2 6 . 5 5 2 5 , 9 1 : 9 . 2 5 2 9 . 5 5 ; u . d i A - , 1 0 : 0 ^ i " E " D E ; - R L ; R : F T 0 . 0 0 0 . ' % 0 . 0 0 ' ; . o o 0 . 0 0 0 . 0 0 0 . 0 0 : ; . ' : ' . 0 , 0 0 : ; , ; ' o T O T A L : L U W ; C F E = ! U " ; ~ 3 c 4 = 5 4 £ 3 s ' . 9 ' . ; F L O N E " R C i i - : ; ; F 5 ; Q , - ] ' . ; 0 ' . J . • • , • - • • & ! ; ^ F L D s . E " " O R 0 . 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 , 0 0 0 . 0 0 0 . 0 0 0 , 0 0 0 . 0 0 ' . : . - ' o 0 . 0 0 . 1 . ' T O L E R u N C E ; ? T ) ; O . O l u . 2 > " C L E R A N C E u i ^ i . 0 0 0 ^ n w F ; E N T ' E i 0 5 - 3 1 - ; 3 ^ : ? - = ; . 4 ; 2 5 ; C ~ F I L E D A ~ E ; ; . 3 - 3 1 - ; 3 ^ ? ; - E ^ E : ; ^ 2 0 3 F — F O f i ^ N C E C ^ V E ^ ? C U L - . : E : " ^ - £ E : h J c ^ 5 4 5 0 9 0 - E ^ D - S A ' E R E . E V , • , - - ' ^ ; N L £ - ; Q N T R u L D E F T - ( f t ; O U T L E T C O M T R Q L F L Q y D £ F T - < T r F h i f f - ( F 4 ; f ^ ^ h . C R I ~ I C i - L D E P T H D E ^ - i f f ; t O L T . ; " . £ . . D E ^ " - : S £ : [ . r ~ : : T r i l L i ^ T L " V E - . D E P T - i ? T 3 = ; \ r ~ : } 2 B 2 S , 2 5 2 9 2 - ? 2 ? 3 0 3 0 , 2 0 , 1 4 5 s , 1 4 , 5 3 . 9 1 . 2 5 , 5 5 , 8 4 , 1 0 , 4 1 0 , ' 0 . 9 - * 1 = ^ L ? 4 2 = 3 5 2 . 7 1 3 , 0 5 3 . 3 5 3 . 6 4 3 . 9 0 4 . 2 ; 0 . 0 0 0 . ? - * 1 , 4 S 1 , ° 4 2 . 3 5 2 , 7 1 5 . 0 5 3 . 3 5 3 . 6 4 J . 3 0 4 . 2 1 0 - N F 1 - 5 2 " ; l - S 2 n l - 3 2 - l - 5 2 n l - S 2 n l - 3 2 n l - 3 2 n l - 3 2 n l - 5 2 n 1 - S : ^ 0 . 0 0 ' . . . y i ~ ' ' ? 0 , 9 5 1 . 0 3 1 . 1 3 i . 2 3 1 , 3 3 ^ f ' i ; ' 0 , 8 ; - i C 1 . 4 7 L " : 1 . 9 3 ' 2 . 1 2 ' 2 , 3 0 2 ^ 7 i . 4 0 2 . & 1 2 . 4 9 : . 7 S • ^ & c • ) M - ; 7 : 2 , 3 < : 3 . 6 1 1 4 . 2 4 1 4 . 7 1 1 5 . 1 5 1 5 . 5 2 1 5 . 8 6 i s . 2 0 0 . 0 0 : f ; 3 0 . 3 5 1 . 0 0 t . 1 3 2 . 2 6 1 . 3 9 1 . 5 0 1 , 5 ? L " l ; , 0 i . 3 4 4 . ^ 3 5 . 1 6 5 . 3 s 5 . 8 9 6 . 1 7 6 . 4 1 6 . 6 d & . S 2 ~ , 0 2 0 . 0 0 o . s ? ! . ; . u e ^ 1 . 3 7 1 . 5 2 1 . 6 5 1 . 7 7 1 > S S 1 . 9 7 2 . 0 3 ^ y , ' . ; - , - t _ ' - - , • ' . ' \ ^ ' \ I , ^ ' < - \ E l , : n i £ t f ; c e i n ^ ' t y . i n l e t t h - y i t i n v i ' t 2 i . 2 0 f t 0 , 0 0 f ? E l . o u ^ l i T i n » s r t E l , i n l s ? c r e s t 2 3 3 . 1 0 f t 0 . 0 0 f t " - . D H T A — C U L L E R T I N V E ? " * — " " — I N L E T S T A T I O N ( F T ; I N L E T £ l £ V f i T I C N ( F T ) O U T L E T S T A T I O N ( F T ; J U T L S T E L E V A T I U N ( F T ) I - U S B E R 3 F B A R R E L S ^ 3 L U P E ( V - F T / K - F T i ^ C U L V E R ' L E N G T H - L J N 6 S L O P E i : T o . o c : = , ; • : • l o o . y o - . - - ; - • - ; 0 . 0 3 : ; 1 0 0 . 0 : " S U L V E w T D A T A S l i M S A R Y ^ R R £ L S H A P E B A R R E L D I A N E T E R B A R R E L N A T E R I A L B A R R E L S f t N N I N f c ; S N I N L E T T Y P E I N L E T £ D £ E " N & i - A L L I N L E T D E P R E S S I O N < • * — * — + * — r ^ * * - ^ - * - - - ( * 4 * C I S C U L A R 4 . 5 0 F T C O N C R E T E 0 . 0 1 2 C C N V E N T I O f < f t L S Q U A R E E C b E y I ~ H H E S D ^ L - h - G N E ' I D n - ^ " D A F E ; ; . ; • . ; ! - : W 4 - ^ y T I ? i £ ; - : ; ^ . " 5 - 1 1 : 5 M T i s ; ; ; - ' ] ; - ; . 5 - ; 4 : I . E N A " ! E ; : - ^ ; : : ' ; J - I " - ^ - " i - 1 " : " • * " : ; £ 5 J L A S C " " : : . C R Q 5 ; S E ; T I G N t ^ — - — — 5 C ~ O M . i D " - ^ ' ^ : . • ; < • S I D E S L O P E " / ' ; ; X s l j 2 , . ; C h W E L S L O P E v / h ^ T . ' F T } ; . ^ 7 I N N I N G S N ^ 0 , - ; . . ; C J 3 0 : " ^ N E L I - E ^ E L E W ' : ^ : : : - ; - : . ^ ; U L ^ E - r N C . . C U T L t T I N y E R T E L E w T I D F i 2 : , l 0 F - — " U N I F O R M F L Q N R A T I N 5 C ^ R V E F Q R D O ^ S T R E A M C H A N N E L 0 F L Q N i C F S S 0 . 0 0 ° . o o I g . Q O - 2 7 . 0 0 3 c . O O 4 5 . 0 0 5 4 . 0 0 i 3 . ^ 7 2 . 0 0 5 . ; . 0 0 w . w N . S . E . ( F T ) 2 3 . 1 0 2 3 . 7 ° 2 4 . 0 8 2 4 . 2 9 2 4 . 4 7 2 4 , 6 2 2 4 . 7 ; 2 4 . 3 7 2 ^ U S 2 5 . C 7 2 ^ . I S F R Q U G E N U M B E R O . O Q C 0 . 3 1 5 0 . 3 2 4 0 . 3 3 2 0 . 3 3 7 O . S 4 2 0 , 8 4 6 0 . 5 4 s 0 . 3 5 2 O . S 5 5 0 . 8 5 E D E P T H ( F T ; 0 . 0 0 0 . 6 ? 0 . 9 8 1 . 1 9 1 . 3 7 1 . 5 2 1 . 6 5 1 . 7 7 i , s e l a - ; 2 . O S v £ L . ( F F S ; O . Q Q 3 . S 4 4 . 6 3 5 , 1 = 5 , 5 6 5 . E = 6 . 1 7 a , 4 l 4 . 6 4 5 . S 2 7 . 0 2 S H E A S ( F S F ; 0 . 0 0 0 . 7 3 1 . 0 4 1 . 2 7 1 . 4 5 1 . 3 ; ; ~ 7 ^ ; • - l . ; S 2 . 0 0 : . 0 9 : . : ! • : w R U - L W - : L / E ^ - f r n ? N £ D " ~ ^ R O A D W A Y S U R F A C E E M B A N K M E N T T O P . I D T - ( - T ) C R E S T L E N G T H ( F T ) O V E R T C P P I N 5 C R E S T E L E V A T I O N ( F T ) S ? " E , - ^ . 5 0 . 0 0 3 1 . 5 0 I u 0 t , - 0 ' . - 1 . s ^ g I ? § ^ s g s ^ T O J 0 i n I u ^ u M n i n i n - i n < : L P t i n i n i r i i n i n u ^ i n u ^ o o o o 0 0 s o o o o c o o o o i i § 1 I I S l ? i " C J J ^ - ^ · ' ~ 0 0 0 0 0 0 0 0 0 0 0 0 O C 3 C X h ^ o N - r l ^ o o ^ < o o c ^ h - o ' o c o c o i n f ^ - i Z M i n r d i r i w - m L T t ^ - o j ^ r ^ ^ < - < - < • i n ) o o o o o o < i n t n i n o i n o o o r ^ . t O r ^ . r ^ i T i i n ' ^ T - ^ o ' o i r i ^ t i n s r i n § § § § g 8 ^ g § § g § g s g § ! O O O O i n r ^ Z L n i T i i n o o i n i n i n i n i M • « — • ^ - i n ' ^ ' ^ ' O M O ^ ^ - i R ! ? K S J ! ^ ' 3 < % f t c 8 f t K 3 : ' 3 S : ! ? i ! • ^ p j f M c O N i n s t ^ ' ^ - m j o - » - o o < — r ^ j ^ , r r j » - r \ j < - T - m v - - * - . u g s ^ S S £ S ? S % S ^ ^ S S g S S ? 3 S S S J i o o o o o ' o o ' o o o o o " o ' o o o o o o o i 3 S ^ - s § 5 • o < r M t n ~ f o r ^ ( M i < - i o - m . » - f ^ ' d N N ~ » - o ~ » ^ o i n i n < ^ z C M ^ - - < - • « - < - ! i I s § 5 o o o o o o ' O N i n o - i n o o « - n f ^ - - i n < o M N ( \ J N ^ I I I ! u i a \ g g ° ' S G ' " § S % 5 % ? ^ ^ I 8 S j ~ » c g ( M c o c p i n r ^ * - l - - i n n l ^ . { > , ^ - M i n - t f - ^ - S S f M O N i n i n r ^ r ^ » - N - > O < - r ^ ^ - r u < - < — r > j ; . ' " j p m c o o a 3 t . . o ^ i n u ? N . 0 1 t o ^ ^ S P " ? ' " 0 ' ^ ' * ? ^ ' 0 » ! I 1 3 l § l ^ I ° L O O O O O O G O O O C O O O O O C 5 0 0 0 0 ^ S J ^ A ^ s " I « I L U 5 ^ ^ 1 o i n o o o o o o o i n o o o o o o 5 S S o g P $ ] § S S g £ S S S ^ ^ • • s a - < 4 - ' 4 - < 4 - r ^ . d - - < r < T s d - • 3 g K g ? 3 ^ ? 5 S & R g K S F ; g 3 K ^ S g ; o j ' S ; o m o o c 3 ^ r o ^ » M o o n o o o o o o o o o i n J Q C s i M i n n i n ' o i n c o N - ~ » c o « - < r i J O ^ o o ' r > j r - o " . r - ^ c p t ^ ' o p . ' o ' - T - t n i n N . i n r ^ . K i O ' o o . ^ P J M I T i I T t S S § S P : S S ! 9 o ; K . 3 z ^ ; I 0 " ? " ! < 3 " i l , § R i N « { 5 i i n r j ^ ^ i - c o c M i n o . t n i n m F - • - 0 i n 0 > n ^ ' o o ° S " F 3 ^ N o l n o ' ~ > n o " n ' ~ 1 " ' 0 J L i i : s s S 3 S A ? • ? ? • ? m N i n ? I I . ^ U J s $ • . + + + + _ ; { _ _ o ^ - s N f ^ ( M ~ » i n ~ : r 5 < S ' S ^ ' S 5 3 5 < S ' < S S 5 | 5 i 5 ' < 5 5 5 S " g 3 £ ? I £ e § s " s ! i £ = ! § 3 3 8 S 8 2 § ^ > ~ s i s c < D C 3 c o w ^ r c _ s < u N ^ ^ I I ^ i i n s § S - M - " s ' s I I * I / - ' - u . . ; - ; ; S S 2 ^ S K ^ S S g ^ S S S S S - ^ ^ ^ ^ ^ ^ ^ • • r ^ ^ ? F ^ I - ^ ' : ; < i ' 3 W ^ ; r T ^ ^ - . " - — . ' - - ^ / » . _ - < - • ^ ^ l ^ ^ f i ^ l ^ P ^ - l - ^ ^ V ^ A ^ ^ . - ^ ^ ^ - r f . j ^ - ^ ^ — ^ S » ~ ^ ^ n y ^ ' ^ ^ ^ F T — • * • • ' ; N E ; B 9 t s » | s : « . ^ • " • - ; 1 : : ^ - ; : , . - - - : . : . > . . l : s s : : : ^ s ^ ^ e ^ \ - . . ^ . ^ ^ S ! ^ ^ ; - - - - : - . . . ; p T n ^ - s - - - ? - • ; T N * — ' 1 • ~ . " y s s ^ ^ K - , * ; . ; ' ? ^ . i ' . ^ . ' . , ^ ^ ™ B a ; - . - r . • • . . • : T - ? : . ' " , . - : r : . : ; . . — . : . . - : - - i l - . 0 0 - 0 0 0 0 1 m ^ - ^ ^ ^ ^ ^ ^ • ^ • ^ • - r - : ' ; - w z : - s ^ - a ' u f — u - e : - - - > - - ^ - • - - • - • • — — , • 3 I ; ^ ^ Y O O Q L 0 0 - O O O B o o - o o o s 0 0 - 0 0 0 t - < 3 L , ^ - - ; - - < 1 ~ ^ € 0 0 - O O O E f . 1 • . a 4 \ , ^ - . < { ^ ' . 1 ^ , . < ^ } W ^ : 1 ^ - . q . ? . 1 - ^ 1 • > : W • i f f l l - x t • ^ • { • a ^ ^ ^ ; < < - l a 0 0 - 0 0 0 2 w ^ ^ c - l i E I I E i . a — - - S : O O ' O O O I 0 0 - 0 0 6 0 0 - 0 0 8 c - ^ 2 1 ^ K X ' - S a & £ ' t t 0 0 ' ^ s o c r o o s 0 0 - 0 0 f r o o ' o o e • i S b t / - * • ; - ' - o o - o a z • • • ^ p ^ & . ^ ^ ^ , s ^ • \ r j 3 r < § 8 ^ ' x < - , i d ^ 5 ° 1 " - % 1 3 < 7 ; ' 0 ^ ; O O T O ' ^ i o o - o s S - S i 9 i K f ? ) G 3 S h e I ^ ^ S , - , ' 1 > ^ C ^ l - t t f l \ « n : o o - c r t ' 0 0 ' O E Z ? h U J o o ' o z ^ . m ( n O i . < ' . - • ' ' = ) 0 1 0 0 - 0 1 0 0 - 6 C O ) 0 8 • L - 9 < o o - s U J o r O O ' f r < ~ ! L O C t » U J ^ " 5 0 ^ S l l ^ ' - j - ^ < a o o - z < n y ^ ^ c a 0 0 1 0 1 0 6 - 0 8 ' 0 1 ' 0 9 - ^ 5 9 o s : : S f r - O t ' s r o c s z o z - s r . s a ; ^ a 8 g ^ ? g s § 8 8 0 0 0 0 8 t f m C M 0 B 1 c ^ l l ^ o o s % ' - y ^ 5 - J § 8 § S § 8 8 S ^ § ^ ^ ^ , - ' : . i . . . ^ , . . . ^ ^ s s s ^ - - i - S ^ ? ? ' " S i ( s j o ) a o y v H o s i a i ^ K - S ' : t : ' ' : : ' : : ^ ^ ^ ~ - . . \ - ^ - ^ ' • - . • i ^ ' . ^ . : ' ^ ' ^ • • . = i ; < " ? " y i j ^ . M . ^ Q ^ ^ ^ ^ ^ . - ^ ^ ^ ^ ^ ^ ^ j ^ i i i S S ^ ^ - ^ : ' ^ ^ i i s ^ l ^ f e E ^ ; K ^ • ' ' " . i - - ' ' • " ^ • • S ^ S S ' S S S ^ ^ S B S a S s S ^ w ^ ^ ^ ^ ^ ' » A & ? - ? / ^ : . . s s s . - /•tHYD R A U L I C D A T A S U M M A R Y - ^ S T A T E U O N . T A N A P R O J E C T N U U S E R S - P F 5 0 - 2 ! ; ; , £ 2 S H E E T N O . 2 2 STATIONSTREAM NAME( IF NAMED )SIZE /IYPESTRUCTURE (l)^A)C4' D E S I G N F L O O D M A S N f T U D E K I S . } F R E Q U E N C r 0 . ! H . W . E L E V . ( f . T . 1 M A G N m j O E I C ^ ^ . j B A S E F L O O D ( 1 % ) | O V E R T O P P I N G F L O O D @ @ H . W . B ^ V . ( F . T J M A G N m j D E ( C . F ^ . ) A P P R O X . F R E Q U E N C Y I V . } H . W . E L E V . ( F . T . I R E M A R K S ( F L O O D O F R E C O R D , Q p ( m a x ) , E T C . ) /-ir73Cr?)- CP.EEK6' SSWx 3' RISE RCB 9 5 • ^ 7 0 7 . 5 9 5 4 7 0 7 . 6 I S I < • - 2 ^ 7 ; 0 . 0 0 7 D I V I D E 27-30.JL P--C- CREEK5' S x 6' H WS _ i e o _ , 1 4 7 1 5 . c ' 5 0 _ ~ ' 7 / - 5 . 6 I R ? / 4 7 . ' 5 . ? O T D A / / D . r s.F- ?n^y pc C f f 7 i f f ~ i ' 7 Q ^ M T ^ ' S B y - ^ p n ^ , ? - n ° r r i i v t n ^ - - \ ;20-'5554" DP. £ 5 z ^ 7 5 7 . 5 7 5 - 7 5 7 . . 3 / • i 7 0 < - ? ^ S G I . 5 0 7 E O - D ;5 ;-POVcD::^D C PEEK45" D". 5 0 ^ _ < Q ' . ° . I C D - 5 1 5 . 5 / ; 5 ^ . z _ ' - 8 2 2 . 0 O T O h ' i Q E 1^-r;?i^ i yro ca^F<^^" y ?7" nft ^ 5 z _ ^ R 9 / . o ^ _ ^ F . ? ? . 0 _ 2 _ ^ f l ? ? . ^ o r n v i n ^ ZC^'20:-y~ES cPEEK5^" C.c 5 0 ? ^ 5 3 0 . i s ^ - 5 3 0 . - f . ' Z 2 _ G Z - ' 5 J / . 5 O T D V i C E ^S7-3,5 pr.^2" S _ Z i _ ^ ^ £ ^ < . ! £ • 3 - - 5 3 - : . S c s _ ^ 3 5 5 . C 0 7 A F = - O ^ C - = r ) . 2 :E- '535" C3 z ^ 2 ^ S J c . ^ 5 3 5 . 5 7 ° . 5 < S 4 0 . Q C T l / - W L ! ' f E - S ~ A . 2 ' 4 + G O 2ZO-;56" D= 2 5 ^ ^ 5 J S . 6 5 / - : S 3 C . 7 5 5 . - - 5 < 6 - ? 0 . 0 D T C ' V ! U . 1 C - Z;^-5£36" 2 5 ^ _ ^ £ - - = . £ ^ 5 ^ - . S - ^ - i ' £ J 5 . 0 J 7 C . ' i ^ D J _ 305-235!'/e" x 3;^" KPA L 5 _ 7 - : c c / . 7 ^ 3 - ^ 5 5 . ; . 5 - : - : £ ? . = : : . R • C ' ~ ~ ' / f ~ j : - • r ' T C H ^ 1 O C K 1 J20-3336" -?CC ; 2 2 ^ £ 5 0 . 5 - 5 5 0 . 5 e - ^ < . 2 ^ 6 5 ^ . 5 0 7 " D A / / 0 £ F\JO~[~ES • * H.W. ELEVATK3NS SHOWN ARE BASED UPON PEAK RJ3W ANALYSIS UNLESS NOTED IN R E M A R K S C O L U M M . »tI.il'<B^»s @STRUCTURE SEE OR TYPE AND RELC.TEO HYDFLAUUC OATA MAY NOT REFLECT 04A N G E S W A D E D U E TO RW OR OTHER CONSIDERATIONS (LE. STOCWASS ADDED. STRUCTURE SIZE OS P l T E D - 1 A N G E D . ROAD GRADE CHANGED DURING CONS'TUCTION. ETC.)@9A^ BRDGE LENGTH SHOWN EQUALS THE WATER SURFACE WIDTH IN THE OPENING AT T r i E D E S I G N K . W . ELEVATION MEASURED NORMAL TO FLOW.@("3).(4)OVEiTTOPPIMS S DEFINED AS P^OW OVER THE ROAD, R-CTW TriROJGH A S1GNIFICAA T R E U E F S T n U C T U ? . E Off F.OW OVER THE &ASIN DMOE VS'HICHEVER IS LOWV{.FOfl THOSE CROSSINGS NOTED BY Qp{mvS IN TOE FtSMA.WS CO^'JMN OVEETOPP'NG D O E S N O T O C C U R A M C ' THE FLOOD k'AGNmjDE LISTED CORRESPONDS TO T1-IE FLOOD OF SECTION 6oC.^5 | e ! 0 ! ( n ) O F F E D E F A L - A I S roUCY GUIDE; SLBCHAJ-TER G. FART 65C. SUBFAflT A IDEC. 'EW;TOE R.OOD SPECIFIED IS SUBJECT TO STATE-OF-TH&^WT CAPA3.!LT/ TO ESTIh'/.TE T r i E E X C E E C A S C E P R O & A B i L r T t ' . I F1"S 0^%; BRIDGE -TXi)t+GH WATER ELEVATIONS MAY VARY SLIGHTLY 3EPENDING UPON THE PIPE OFrPON S E L E C T C D . E X C E E D A N C E P R O B A B I L I T I E S 2 5 Y E A R 5 0 Y E A R 1 0 0 Y E A R 2 0 0 Y E A R 5 0 0 Y E A R 4 ' % C H A N C E 2 % C H A N C E 1 % C h i A N C E . 5 % C H A N C E . 2 % C H A N C E B O Z E M A N - F O U R C O R N E R S n n C ) u U S D A n S t a t e s D b i n e n t o f A g r i c u l t u r e N a t u r a l R e s o u r c e s C o n s e n / a t i o n S e r v i c e 3 7 1 0 F a l l e n S t r e e t # B B o z e m a n , M T 5 9 7 1 8 N o v e m b e r 8 , 2 0 0 1 P a u l S a n f o r d A l l i e d E n g i n e e r i n g D e a r M r . S a n f o r d , E n c l o s e d p l e a s e f i n d t h e s o i l s i n f o r m a t i o n y o u r e q u e s t e d f o r t h e a r e a s u r r o u n d i n g A a j k e r a n d B a x t e r C r e e k s . P l e a s e n o t e t h a t M o n t a n a N R C S p o l i c y r e q u i r e s t h a t w e a s k y o u t o i n c l u d e t h e f o l l o w i n g s t a t e m e n t o n a l l d o c u m e n t s a s s o c i a t e d w i t h a n a n a l y s i s o r d e t e r m i n a t i o n c o m p l e t e d u s i n g N R C S ' s s o i l s d a t a o r m a p i n f o r m a t i o n : T h i s i n a p a n d a s s o c i a t e d i n f o r m a t i o n a r e t o b e u s e d a s a p r i m a r y r e f e r e n c e s o u r c e a n d a r e n o t i n t e n d e d f o r u s e i n s i t e - s p e c i f i c p l a n n i n g . T h i s i s p u b l i c i n f o r m a t i o n a n d m a y b e i n t e r p r e t e d b y o r g a n i z a t i o n s , a g e n c i e s , u n i t s o f g o v e r n m e n t , o r o t h e r s b a s e d o n n e e d s ; h o w e v e r , t h e y a r e r e s p o n s i b l e f o r t h e a p p r o p r i a t e a p p l i c a t i o n . F e d e r a l , s t a t e , o r l o c a l r e g u l a t o r y b o d i e s a r e n o t t o r e a s s i g n t o t h e U S D A N a t u r a l R e s o u r c e s C o n s e r v a t i o n S e r v i c e ( N R C S ) a n y a u t h o r i t y f o r t h e d e c i s i o n s t h e y m a k e . I f y o u h a v e a n y q u e s t i o n s r e l a t e d t o t h i s i n f o r m a t i o n y o u m a y c o n t a c t m e a t 5 2 2 - 4 0 1 6 . T h a n k y o u f o r y o u r c o o p e r a t i o n a n d f o r y o u r i n t e r e s t i n t h e G a l l a t i n C o u n t y S o i l S u r v e y . S i n c e r e l y , K a t i e A l v i n N a t u r a l R e s o u r c e P l a n n e r G a l l a t i n C o n s e r v a t i o n D i s t r i c t E n c l o s u r e s T h e N a t u r a l R e s o u r c e s C o n s e r v a t i o n S e r v i c e w o r k s h a n d - i n - h a n d w i t h t h e A m e r i c a n p e o p l e t o c o n s e r v e n a t u r a l r e s o u r c e s o n p r i v a t e l a n d s . A N E Q U A L O P P O R T U N I T Y E M P L O Y E R 0 M u s y m , ( S f f O M 4 4 8 A i ' 4 5 7 A 4 5 3 B 4 5 7 A 5 0 9 B j l 5 I O B I I I . Z ] Z . - 5 3 7 A . , . . _ . . J _ 5 4 2 A L r 7 4 8 A ! _ M _ W 1 ^ - . - . - . _ 1 5 1 8 2 1 0 3 4 2 3 1 8 c : ' u U . S . D E P A R T M E N T O F A G R I C U L T U R E N A T U R A L R E S O U R C E S C O N S E R V A T I O N S E R V I C E P A G E 1 O F 3 1 1 / 8 / 0 1 W A T E R F E A T U R E S A l l P l a n n i n g F l o o d i n g I J - H i g h w a t e r t a b l e a n d . p o n d i n g M a p s y m b o l | H y d r o - ] a n d s o i l n a m e i l o g i c | F r e q u e n c y I g r o u p W a t e r M a x i m u m D u r a t i o n | M o n t h s | t a b l e | K i n d o f | M o n t h s | P o n d i n g | p o n d i n g I ] d e p t h | w a t e r t a b l e ] . 1 _ I _ I _ I . d u r a t i o n d e p t h J _ I - 4 4 8 A ; H y a l i t e . B e a v e r t o n - 4 5 3 B : A m s t e r d a m - Q u a g l e - 4 5 7 A : ' s r - 5 0 9 B : E n b a r - 5 1 0 B : M e a d o w c r e e k - 5 3 7 A : L a m o o s e - 5 4 2 A : B l o s s b e i - g - 7 4 B A : H y a l i t e . B e a v e r t o n - I I B B I • I B | . 1 B J B B I R a r e I I c I D c B I B F t I - - - I 4 . 0 - 8 . 0 [ A p p a r e n t | M a y - A u g | I l l I I I - - - I 4 . 0 - 8 . 0 [ A p p a r e n t | M a y - A u g I I I - - - I — I I I I I I l l I I I - - - I 4 . 0 - 8 . 0 [ A p p a r e n t j M a y - A u g I I B r i e f J A N - J T J L | 2 . 0 - 3 . 5 | A p p a r e n t ] A p r - J u l I I 2 . 0 - 3 . 5 | A p p a r e n t I A p r - J u n [ I I I I I 1 . 0 - 2 . 0 [ A p p a r e n t | A p r - J u l I I I I 1 . 0 - 2 . 0 [ A p p a r e n t | A p r - J u l F t I I I I I - - - I - - - I - - I I I I I - - - I ^ | . . . . . ^ . . - . . . , . . . . - , . . - I - . . . . . - . . . , . . . . . - . , . - . , . . . , . . ! _ I J ^ . - ^ - . - - . . - - _ - . J - _ - _ . _ _ _ ^ t ^ _ - _ u U . S . D E P A R T M E N T O F A G R I C U L T U R E N A T U R A L R E S O U R C E S C O N S E R V A T I O N S E R V I C E P A G E 2 O F 3 1 1 / 8 / 0 1 W A T E R F E A T U R E S E n d n o t e W A T E R F E A T U R E S T h i s r e p o r t g i v e s e s t i m a t e s o f v a r i o u s s o i l w a t e r f e a t u r e s . T h e e s t i m a t e s a r e u s e d i n l a n d u s e p l a n n i n g t h a t i n v o l v e s e n g i n e e r i n g c o n s i d e r a t i o n s . H y d r o l o g i c s o i l g r o u p s a r e u s e d t o e s t i m a t e r u n o f f f r o m p r e c i p i t a t i o n . S o i l s n o t p r o t e c t e d b y v e g e t a t i o n a r e a s s i g n e d t o o n e o f f o u r g r o u p s . T h e y a r e g r o u p e d a c c o r d i n g t o t h e i n f i l t r a t i o n o f w a t e r w h e n t h e s o i l s a r e t h o r o u g h l y w e t a n d r e c e i v e p r e c i p i t a t i o n f r o m l o n g - d u r a - t i o n s t o r m s . T h e f o u r h y d r o l o g i c s o i l g r o u p s a r e : G r o u p " A " . S o i l s h a v i n g a h i g h i n f i l t r a t i o n r a t e ( l o w r u n o f f p o t e n t i a l ) w h e n t h o r o u g h l y w e t . T h e s e c o n s i s t m a i n l y o f d e e p , w e l l d r a i n e d t o e x c e s s i v e l y d r a i n e d s a n d s o r g r a v e l l y s a n d s . T h e s e s o i l s h a v e a h i g h r a t e o f w a t e r t r a n s m l s s i o n - G r o u p " B " . S o i l s h a v i n g a m o d e r a t e i n f i l t r a t i o n r a t e w h e n t h o r o u g h l y w e t . T h e s e c o n s i s t c h i e f l y o f m o d e r a t e l y d e e p o r d e e p , m o d e r a t e l y w e l l d r a i n e d o r w e l l d r a i n e d s o i l s t h a t h a v e m o d e r a t e l y f i n e t e x t u r e t o m o d e r a t e l y c o a r s e t e x t u r e . T h e s e s o i l s h a v e a m o d e r a t e r s t e o f w a t e r t r a n s m i s s i o n . G r o u p " C " . S o i l s h a v i n g a s l o w i n f i l t r a t i o n r a t e w h e n t h o r o u g h l y w e t . T h e s e c o n s i s t c h i e f l y o f s o i l s h a v i n g a l a y e r t h a t i m p e d e s t h e d o w n w a r d m o v e m e n t o f w a t e r o r s o i l s o f m o d e r a t e l y f i n e t e x t u r e o r f i n e t e x t u r e . T h e s e s o i l s h a v e a s l o w r a t e o f w a t e r t r a n s m i s s i o n . G r o u p " D " . S o i l s h a v i n g a v e r y s l o w i n f i l t r a t i o n r a t e ( h i g h r u n o f f p o t e n t i a l ) w h e n t h o r o u g h l y w e t . T h e s e c o n s i s t c h i e f l y o f c l a y s t h a t h a v e a h i g h s h r i n k - s w e l l p o t e n t i a l , s o i l s t h a t h a v e a p e r m a n e n t h i g h w a t e r t a b l e , s o i l s t h a t h a v e a c l a y p a n o r c l a y l a y e r a t o r n e a r t h e s u r f a c e , a n d s o i l s t h a t a r e s h a l l o w o v e r n e a r l y i m p e r v i o u s m a t e r i a l . T h e s e s o i l s h a v e a v e r y s l o w r a t e o f w a t e r t r a n s m i s s i o n . I f a s o i l i s a s s i g n e d t o t w o h y d r o l o g i c g r o u p s i n t h i s r e p o r t , t h e f i r s t l e t t e r i s f o r d r a i n e d a r e a s a n d t h e s e c o n d i s f o r u n d r a i n e d a r e a . s . F l o o d i n g , t h e t e m p o r a r y i n u n d a t i o n o f a n a r e a , i s c a u s e d b y o v e r f l o w i n g s t r e a m s , b y r u n o f f f r o m a d j a c e n t s l o p e s , o r b y t i d e s , W a t e r s t a n d i n g f o r s h o r t p e r i o d s a f t e r r a i n f a l l o r s n o w m e l t i s n o t c o n s i d e r e d f . J . - o o d - i - n g . , . . . . n o . ^ - i - s w a t e r . ± . n . - s . w a m p s . a . u d i - - m a r . s l i e s . . , . . . . . T h i s . r . e p _ o r . t . . g i v e s t h e , , f r e q y e n c y . a n d . _ d y r a t i Q n p f f l o o d i n g . a n d t h e t i m e o f y e a r w h e n f l o o d i n g i s m o s t l i k e l y . F r e q u e n c y , d u r a t i o n , a n d p r o b a b l e d a t e s o f o c c u r r e n c e a r e e s t i m a t e d . F r e g L i e n c y i s e x p r e s s e d a s " N o n e " , " R a r e " , " O c c a s i o n a l " , a n d " F r e q u e n t " . " N o n e " m e a n s t h a t f l o o d i n g i s n o t p r o b a b l e ; " R a r e " t h a t i t i s u n l i k e l y b u t p o s s i b l e u n d e r u n u s u a l w e a t h e r c o n d i t i o n s ; " O c c a s i o n a l " t h a t i t o c c u r s , o n t h e a v e r a g e , o n c e o r l e s s i n 2 y e a r s , a n d " F r e q u e n t " t h a t i t o c c u r s , o n t h e a v e r a g e , m o r e t h a n o n c e i n 2 y e a r s . 3 r - ' - i o n i s e x p r e s s e d a s " V e r y b r i e f " i f l e s s t h a n 2 d a y s , " B r i e f " i f 2 t o 7 d a y s , " L o n g " i f 7 t o 3 0 d a y s , a n d " V e r y L i f m o r e t h a n 3 0 d a y s . T h e i n f o r m a t i o n i s b a s e d o n e v i d e n c e i n t h e s o i l p r o f i l e , n a m e l y t h i n s t r a t a o f g r a v e l , 3 a n L . , s i l t , o r c l a y d e p o s i t e d b y f l o o d w a t e r ; i r r e g u l a r d e c r e a s e i n o r g a n i c m a f c t e r c o n t e n t w i t h i n c r e a s i n g d e p t h ; ? . n d a b s e n c e o f d i s t i n c t i v e h o r i z o n s t h a t f o r m i n s o i l s t h a t a r e n o t s u t o j e c t t o f l o o d i n g . A l s o c o n s i d e r e d a r e l o c a l L n f o r m a t i o n a b o u t t h e e x t e n t a n d l e v e l s o f f l o o d i n g a n d t h e r e l a t i o n o f e a c h s o i l o n t h e l a n d s c a p e t o h i s t o r i c f l o o d s . J . S . D E P A R T M E N T O F A G R I C U L T U R E M A T U R A L R E S O U R C E S C O N S E R V A T I O N S E R V I C E P A G E 3 O F 3 1 1 / 8 / 0 1 W A T E R F E A T U R E S E n d n o t e - - W A T E R F E A T U R E S - - C o n t i n u e d I n f o r m a t i o n o n t h e e x t e n t o f f l o o d i n g b a s e d o n s o i l d a t a i s l e s s s p e c i f i c t h a n t h a t p r o v i d e d b y d e t a i l e d e n g i n e e r i n g s u r v e y s t h a t d e l i n e a t e f l o o d - p r o n e a r e a s a t s p e c i f i c f l o o d f r e q u e n c y l e v e l s . H i g h w a t e r t a b l e ( s e a s o n a l ) i s t h e h i g h e s t l e v e l o f a s a t u r a t e d z o n e i n t h e s o i l i n m o s t y e a r s . T h e d e p t h t o a . s e a s o n a l h i g h w a t e r t a b l e a p p l i e s t o u n d r a i n e d s o i l s . T h e e s t i m a t e s a r e b a s e d m a i n l y o n t h e e v i d e n c e o f a s a t u r a t e d z o n e , n a m e l y g r a y i s h c o l o r s o r m o t t l e s i n t h e s o i l . I n d i c a t e d i n t h i s r e p o r t a r e t h e d e p t h t c t h e s e a s o n a l h i g h w a t e r t a b l e ; t h e k i n d o f w a t e r t a b l e , t h a t j - s , " A p p a r e n t " , " A r t e s i a n " , o r " P e r c h e d . " ; a n d t h e m o n t h s o f t h e y e a r t h a t t h e w a t e r t a b l e c o m m o n l y i s h i g h . A w a t e r t a b l e t h a t i s s e a s o n a l l y h i g h f o r l e s s t h a n 1 m o n t h i s n o t i n d i c a t e d i n t h i s r e p o r t . A n " A p p a r e n t " w a t e r t e i b l e i s a t h i c k z o n e o f f r e e w a t e r i n t h e s o i l . I t i s i n d i c a t e d b y t h e l e v e l a t w h i c h w a t e r s t a n d s i n a n u n c a s e d b o r e h o l e a f t e r a d e q u a t e t i m e i s a l l o w e d f o r a d j u s t m e n t i n t h e s u r r o u n d i n g s o i l . A n " A r t e s i a n " w a t e r t a b l e e x i s t s u n d e r a h y d r o s t a t i c b e n e a t h a n i m p e r m e a b l e l a y e r . W h e n t h e i m p e r m e a b l e l a y e r h a s b e e n p e n e t r a t e d b y a c a s e d b o r e h o l e , t h e w a t e r r i s e s . T h e f i n a l l e v e l o f t h e w a t e r i n t h e c a s e d b o r e h o l e i s c h a r a c t e r i z e d a s a n a r t e s i a n w a t e r t a b l e . A " n a r c h e d " w a t e r t a b l e i s w a t e r s t a n d i n g a b o v e a . n u n s a t u r a t e d z o n e . I n p l a c e s a n u p p e r , o r " P e r c h e d " , w a t e r t i s s e p a r a t e d f r o m a l o w e r o n e b y a d r y z o n e . O n l y s a t u r a t e d z o n e s w i t h i n a d e p t h o f a b o u t 6 f e e t a r e i n c . e d . P o n d i n g i s s t a n d i n g w a t e r i n a c l o s e d d e p r e s s i o n . T h e w a t e r i s r e m o v e d o n l y b y d e e p p e r c o l a t i o n , t r a n s p i r a t i o n , e v a p o r a t i o n , o r a c o m b i n a t i o n o f t h e s e p r o c e s s e s . T h i s r e p o r t g i v e s t h e d e p t h a n d d u r a t i o n o f p o n d i n g a n d t h e t i m e o f y e a r w h e n p o n d i n g i s m o s t l i k e l y . D e p t h , d u r a t i o n , a n d p r o b a b l e d a t e s o f o c c u r r e n c e a r e e s t i m a t e d . D e p t h i s e x p r e s B e d a s t h e d e p t h o f p o n d e d w a t e r i n f e e t a b o v e t h e s o i l s u r f a c e . D u r a t i o n i s e x p r e s s e d a s " V e r y b r i e f " i f l e s s t h a n 2 d a y B , " B r i e f " i f 2 t o 7 d a y s , " L o n g " i f 7 t o 3 0 d a y s , a n d " V e r y l o n g " i f m o r e t h a n 3 0 d a y s . T h e i n f o r m a t i o n i s b a s e d o n t h e r e l a t i o n o f e a c h s o i l o n t h e l a n d s c a p e t o h i s t o r i c p o n d i n g a n d o n l o c a l i n f o r m a t i o n a b o u t t h e e x t e n t a n d l e v e l s o f p o n d i n g . u /')u ^ % ? ^ s K i ^ « * : & • t i f , » 1 1 m KS w ^ ^ » ' ^ vsf { w % m • g f, « • s , ! » • • s s t E-^.' » < • w a s r ; St.,rt & - % • f W f r M W •'••3,t- - > ^ ; -y » s m•»•asr.A;('., = f o v t:^m&»« s m ^ M i & I»^ t i £ ^I ; i -I-s i 'iem £ i E ^ s j^ 6 ' B i s •» M i K s s * ^ £]£ s m m ^ : & s m s e s w.£ m i £ ISS s i a ^ S S i t S B S m s R i i S ^E- M S s • ? • ^ s I - ^ t l E S S S s s - 5 E ; E ? • • • a ^.lit m m "f»:« w S 3 •-s-a m s a 8 8 « ^ & i i B a x t e r C r e e k a n d A a j k e r C r e e k A r e a U S D A N R C S S o i l s I S c a l e : 1 : 2 4 0 0 0 R e q u e s t A r e a W a t e r w a y s S o i l s S e c t i o n s v U T M P r o j e c t i o n N A D 1 9 8 3 D a t u m ™ s m a p i s t o b e u s e d a s a p r i m a r y r e f e r e n c e s o u r c e a n d I s n o t i n t e n d e d f o r u s e i n s i t e - s p e c i f c p l a n n i n g , T h i s i s ^ u b l t e ' i n f o n n a t i o n a n d ^ m a y b e i n t e r p r e t e d b y o r g a n i z a t i o n s , a g e n c i e s , u n i t s o f g o v e m m e n t , o r o t h e r s b a s e d o n n e e d s ; h o » v e r , t h e y a r e r e s p o n s i b l e f o f ' t h e a P P i ' o p n a t e a p p l t e a t i o n F e d e r a l S t a t e , o r l o c a l r e g u l a t o r y b o d ^ i e s a r e n o t t o r e a s s i g n t o t h ® N a t u r a l R s s o u r c e s C o n s e r v a t i o n S e N i c e a n y a u t h o r i t y f o r t h e d e c i s t o n s t h e y m a k e . 0 n n 0 u n n n ( u ^ r T r § r [ s | T s l I s ! § 1 s | ~ o T T l s i w l s i I s l I I I s l s l f f l s s l S | 0 3 ' ; ! s | i i i i n i s i i i : [ s l s ] ^ ] e | s l g l . l s i I l l l s i ~ [ i I l l § | S | S o l d l o K ! | S ! | g | S i | H | g g | g | g | | S , | S | S | S | S | 5 | | g | S | g | S | S | g o l o l o l [ a ) o [ o l d [ o l o l [ o | o l d l o [ o | o l s i s 0 1 s . 3 s ? T g S ] K S ! ? i S ! s S ! e T s s s s B 5 s . ^ 1 s . s . s s s s c o 0 l l ° l | s | | s | 5 ? s I 5 g s a f c s ? 3 s s s ? ? ? s ] s s ' s s s s s s 3 s s s K s l ! l r o • \ s s s l s i W s . s | s s . I s . s \ s s . s I s 3 s L O s s s . 3 5 . g g S S . 3 ( ^ s . I I s l s i T s l 1 5 1 s . ^ £ s e 3 s l s l s l S 5 ; | ! : | S | R | S d | d | 6 i 0 s | l | § | s | g | | § g e l s . 3 ^ s s s s s I s s s g s | s K j s a o n I s | ; E s s l g l ? s r s i | 3 £ 1 • e : l \ S \ 3 S i § g s n g c o s I I I E I S I S s s n m E O 3 s 3 s s ' s I I ! I s s s 3 t O £ s s s r s 3 s E s g s . s c K g s s K s . f c I s l s i 1 ^ 1 ; s | S i I ? ; l e | 8 ' I l l 5 1 5 1 ? e | e | s | S [ S § 1 e ; 3 s ? s i l i l l [ T s l l l i l ; e | § 1 s l 5 e § 1 s \ T I ? ! e ( D 1 § 1 I l l 1 § 1 l s i g f ) s ^ I l l s s l s i ^ ' s | s ^ l e | S | ; l s | I s . l i s s ? g ^ s s s e s e K s e i l l • 1 § 1 ; l l l § 1 l s i | g | l s i | s [ § 1 s [ s | 1 § 1 | £ | S | g [ S | l s i I l l l s i I s ! § 1 s I S | I l l s I l s i l s i \ s [ ! - § 1 0 1 l s i 1 § 1 I s ! 1 § 1 | s | l s i ! | S | I s ! § 1 § 1 l s i I s ! S | s l l s i l s i g [ g | s | l s i [ s | l s i | g | I l l < I g l i s l < § 1 ? 1 u . y & 1 g l 5 1 < 0 I l l S 1 3 1 I s I l l I l l I l l N 5 1 y & I s ! & \ 5 1 I l l I 5 < 5 : | i | c o | S | ^ l s i y I I | £ i I : , g l u | ' I l l 5 , \ S l l i 1 S 1 5 1 l i l : ? i l 1 ^ 1 I s ! I g ' i l l i S 1 5 1 f t I 1 ^ 1 l ! l s \ l \ 1 ^ 1 1 ^ 1 I F • 5 ] J l j l s t I s : I : l l l s - w g l ; l s i | B : | B : | S : | B : | s : l | K : | S : 1 f c | S : 8 : 1 S : I s l l g l ; I I . g [ s [ w ^ \ t I l l ? 1 a : l & l ? 1 I f c l | f e | 8 : | f c l f c | g : | l s i I l l ; : 1 8 1 § 1 ; W ^ \ | f e | s : | a : | f c [ £ : j B : | ; l g l g l I l l ; I s ! s l w | g | n r 0 u ; I 1 § 1 [ g [ § 1 g ' l s I I I ! S 1 0 E s ? < o | C T i | t D | - r | u i j n | i n | i n | N [ a | r M | d i | ] ' - | n | p | m [ o [ i ^ . | | e o l - ^ | o o | i o | r ^ | i r i ] l i n l c o l u - i l n l - f j n l I t b l ' c o f i o l - ^ l t D l s i | I l l I f l C | E | S | K | E | | S | S | S | S | S | 5 | | ^ | , ; | s | , ; | ; : | , ; | | g | g | E | E | S | g | | S | 5 | S | g | S | E | | g | g | g | g | g | g | T S | £ | E : | £ | £ | ' ; | | e | £ | " | " | £ | " o ] o [ o | o | o [ | o | o j o [ o j o [ o [ | o | o j o [ o | o | Q | | o | o | o ] o | o | c > [ | o | o ] o | o | o | b | ! • r - | • r - | • r - | ' - ) • r - | • r - | | o | d | i = > | o ' | o | d | | Q ] a | o | o | s | I l l K | R | ? : | K | ! S | | g | g | g | g | g | S | | § | g | g | g | g | g | | 5 | ? | 5 [ 5 | 5 | 5 | | S | S | S | 3 | S | S | | ! ; | f c | t | ! ; | ! ; | K ] | 2 ] s | » | S | S | ° | ^ | " | ' ; | S | ; | & | ° c i | o | o | d j o i | o [ o | o | o j o | o | | o ) o | o | o | o | o | [ o | o ] o | o | c i | o [ | o | o | c ; | o | d | c i | | d | b | o | o [ d | o | [ o | 6 1 d f c i | d l d l | d | 6 | o l d ] o l l i l ; s s s K s K s s s s i s s s s s s s c ' s E s s s s s s . s ? i s s s , ; s ' s | s g , ; s s S | S | 3 s s . s s s s s s i s ' s S i s c o s s s s g s 1 1 ; | E ' l \ g \ 3 . ? ! s ? ! s s e ^ s g s e s s s s . s s g s I s s s ^ n ? : s ' s s I s g s 5 I s I 1 0 I ? s s s s s s 1 § 1 1 § 1 S | e | S | S | £ | S | | i E | £ | £ | S | g | £ | | 5 | 5 | 5 | S | ; | ; | | S | ! g | i r i | i o ) i o [ t n i i o | [ r ; | n ' | n ' | n [ n ' | n | | t o | i o | t o | i o | i o [ > r ; ( | r i [ n s \ s \ s g | § | g [ g | s [ | ^ [ ^ | 5 | ^ | 5 | ^ [ | s | 5 | 5 | K | s | e | l l l ^ l s l s l ^ l s I " I : 1 U | G l £ ! l ^ 1 § 1 § s i l i l j l i l i l l l I I I I I J I I I I I I ] | l | l | l | j | j | j | l § | g | § l i | i | s l 1 1 1 1 1 1 1 1 1 1 1 1 1 l l l l l i l l l i l ! , I " I R n ^ s 3 m [ u j t 3 ] t o [ m o | n | n | n | n [ n - 5 | • ? ! - 5 | • ? ! • 5 | • ? p o | 5 s g s s s 3 . s l ! l s ! S [ E [ s i s s \ s e l e s | s | s | s e | | [ s [ | " I 1 M ^ ' , \ ~ s \ g l s i I R I l s i l s i I s l s i s | s l R l [ R g R 5 1 c | I E I g R R l R | 3 | I e l £ l 5 K l H l K | s l R s i e l \ K \ e | S | g ' s : e l | g | e l g | s e | 0 K ! | S ! s s l s S ! S ! I s e s s s | s £ S e l e l e l s l E l e | I s ! R | I ] K \ I g [ | s | I s ] s l s i s i a s ' l s s ' l s • w l • ? ! ' ? | S | l e i \ s \ I l l § 1 S l S | s l s \ S l \ \ s \ : 1 £ 1 I S | S l s , | s K \ s I s r | S | S l C M I ' S I | 3 | l s i I S 3 1 5 | l s i s l [ s | s | l s i £ | I t s l s l l s i I s s | s | S | s 1 § 1 s l s s I s ! s s l I I s | I I s | £ | s | l s i l s i s l e l s s 3 | t l B l e l s ] s | I s I s ! s | I I s | g l e | s | £ 1 I s l s i s , s S | s | s l ; l s l s s s l & 1 s \ 3 , ^ • l i ^ : o | a j ~ O f ^ d - 1 5 1 f l Q ] | | I K I c f l _ < 1 1 g l ! l l i l i s | i | 1 8 : 1 | S | l s i ^ . l s i I l l I l l 1 1 § 1 ! I N 1 ^ 1 I K : 1 8 : 1 8 : ! s | I l l | S i l s i : | S | I s ! I l l I E I I a : I | s | § 1 s l S | g ' l s \ ? 1 5 : 1 § 1 F s . l 5 l s i § 1 i l l s i | S | | g | § 1 S | l s i I I 1 8 : 1 I s . \ S l l i [ s I s : I f s l s : l 1 ° 1 . s \ : l s i s \ l s i \ s \ S | s \ I S ) l s i I s ! I I s I s l ^ 1 s l ! 1 s s l £ 1 s \ § 1 s l £ 1 s l 5 1 ; 1 § 1 § 1 § 1 § 1 S | I ' f c l f c l f c l l l l i l 8 : 1 5 : 1 8 : 1 I I § 1 1 1 l s i | s | 1 £ 1 2 1 | g | w § 1 s | | s | 1 § 1 l s i \ s \ £ 1 S l s l , ° i l f c l 3 1 s : I I I 3 • £ i § 1 ^ & 1 i \ s l i \ 3 1 s : l ; l g l s i l s i \ s \ § 1 § 1 \ s \ 1 § 1 I s l l § 1 | £ | § 1 I s I S I s I f c l l l g s l ! I s £ 1 3 1 B : : l S : ] w § 1 3 1 s : l l s i ; ; | S | ; l l l § 1 ! | S | i | g | £ | l s l f t l | ^ | i c | : 1 3 1 S I s | [ g j s | l s i j s ^ 1 £ g l S l 3 1 I s : I : 8 : 1 S . W £ | § 1 I l L j ^ S | ; l s l l s i [ £ | ~ s \ s l X l s l § 1 s l s | s \ § 1 | s | C L f t l £ 1 1 ? 1 l y 1 § 1 £ £ s f c l s | 1 £ 1 S | c | j M f t l s : l s I S j l s i l s i l s i I s ! . S | I s ! S | S | S l l s i l s i | s | l ' £ l s l I ^ I S I l g l ? l 1 5 c E : s s | 1 ? 1 ? , 1 £ | £ | S | 5 | I f e l | 8 : | 8 : | g : ! § 1 § l i s | 1 £ 1 w S | ° 1 1 - 1 1 - 1 ^ I P I g s | § 1 £ | § 1 s | s s I § 1 s | l s i I s ! g s § 1 s | l l l l l l l l l l i l l i l l l i l i l j l i l l i l i l l l l l j l i l l ! l ! l i l £ l l l ! o ' l ^ ' . l | n | i r | M | [ M [ n | r ~ | | n | t ) - | c s i | [ N | r ? | n § l s l s l ^ l S | E S | S | S | S | S | | S | 5 | l s i t t 1 - S I I l l s £ £ £ 0 s ; i n s 0 s S i ? ^ R s ? ; s . S ! s 3 s s s s 1 § 1 I l l s s s s S s s s . s . s ^ ^ s ? ^ S ! S ! n s s s s T ^ ; | 5 s e e s s e s . s s s 1 ^ 1 s l s s s \ s 5 | S s . s s s , s s s . s s g s . s K . s s § g 5 c s . s . s t K s g 2 s . s s s s . s g s s s . s s . s ^ t 1 1 1 ^ [ I I s ! 3 s s S s s s s s 5 s s s 5 5 r o s s . s s s s s s s I s 3 ^ 3 s s s s s s I s s s s s s s s 1 1 ^ i l S | S | R ] S | S | S [ | ! £ | K | S | e ] S ] £ ] ] n | 5 [ B | E ! : ; | S | ] g . | i g | g ] S | g | g t O l l O l [ C C 3 ] ( 0 ] ( D | ( D j l O | t O j I ' ^ l ' ^ l ' ^ l ' ^ l - ^ l ' ^ l I n l N l C ^ l n l C M i n [ g [ 5 | g | g | S | | ! S | £ | ! g | S | S | £ | | S | S | S | S i n l > n | t o ! i o | i n | | - n - [ - ^ | - < r j - d - 1 1 ^ s s § g s d s g s d a § C N s s ' g N N § s | s | . l s l i s 8 s s s K s I s s s s s 3 s . s s . j s . s N s s B s I c ^ 3 s 3 s g g e s . K 3 3 ^ i s \ " s I • ? ! - ? ^ 1 s E s 8 s s . s e s s E s s s s s E | s | s s s g s I 5 s S | 5 g [ S g s s j K s 3 s g s . s I I I l l s l s s I g i g s g s g s g s s e s s s s , 5 s s s . s s . I K 5 s I ? s s E ? s C O l s i l s i s . £ s s s . s t o s s s . 3 S s s e s s R s K | g l s | S | £ 5 1 S g s s s I s s s e s s s s s s g s . E s I s s s s . s s s I ! ; ^ s e K £ I E s l s s s I s g I g s | s | s | s l l ' l l l l I I s ? s I 5 s g £ 1 £ s s s s s s s s s s s s R 8 s I R s s I ° s s i n K s 3 i s . i i 3 S I E : 3 ' . I j ^ y Q l t ° t j - C d ^ . o f w _ < < O l t i l 3 ] _ g s g s 8 s g I g g § s g s § s g r g s g e g g g g I g s g r g g § s g g § g g s I s i I g I I s s g " g s g 5 g £ g I g I g § l s i ^ I s ! § 1 I l l s s g s g § g s g g s g s § s g s § ! g I g g g g s g 3 § s g s g s g g 3 g s g s s g s g s g s g g g s g g s g s g g s g g s g s g s I j l i l l s l s l £ ^ s £ | ^ \ m I j l i S | 5 ~ I N | K : ] f c | g : | S : | f c l w s : I : 1 § £ 1 s \ I s & 1 s \ 1 . £ l s 5 : 1 i J B : l s \ I s I f c l l § i I ! 8 : 1 & s : ! l I s f c § 1 - 1 : § I s f c l s l g ^ & 1 ^ 1 2 & s I s : ' I s s : I s ? 8 : 1 ' 1 § 1 I s £ 1 § 1 ? l p ; g | g S | 5 s : I § 1 N s : l § 1 I g w s s ^ 1 ^ ? | ! s : I ^ \ I s 8 : 1 I s 2 : 1 i ! 8 : 1 ; l s l 2 ^ s 1 8 : 1 l g l s l s & \ s s | ? f c l f e l s | s | i s s & l s ^ s l ? f c l f c l £ 1 g | s | I s w l s i I s g 5 s £ ' s s 8 : 1 f c l ? l s l : l s i g 8 : 1 ^ : 1 ? 1 ? > \ ^ \ s I I I I ! £ s £ 1 ? . , S [ a s l ! s £ I s s l l i ' 2 s s w 1 8 1 : 1 8 : 1 § f c l s : l £ l s l § l s l 1 5 : a : I f r l f c I s a : ; 1 ? 1 ; ^ r o l / - . ! 1 1 1 1 S | | s | s . \ s [ l s i I l l s | u I I 1 i t i n n i n ) i n | i n s | s | f t l R I K I ^ I K 5 g I I J I i 1 5 5 | I l l l s i ° | 5 | o | o | o ' » I S 1 5 1 ' ; 1 ' ? 1 5 1 | S | 5 [ S | ° | S | £ 0 [ s | : * < = 1 l i l l i l l s i I s I s s ' £ • s - ; I S ' 1 ; 1 ? 1 ? 1 5 1 | » | ° | ° | S | S | S G I 0 | 0 1 1 ^ S | s \ S l l s i s 3 s s s s s s s 5 s 5 s s . N g 3 s 5 ^ s s . s s s £ I l l \ M l s i | E | I s l s i R s s ; s s s R s K | 5 | ' ? | B | S | £ | | g | S | S [ g | g | S B | g | E | S | S | K | | S | S | S | S | £ | S 1 ! 1 ^ s l \ s \ s s s s g | S | g | g | g | g | | S | ' ? | S | S | T f | n | T r | - < » - l n | i r | | c M [ c M i c \ | c M I l l 2 | § | s | s | g | s g g g g I l l ' s | l s i l s i \ ' i \ j g B e s e s s s K £ s s E s . K L O K I I * " g s s c o l \ . s \ 1 ? 1 • l s i I ? J K £ ^ s s s s 1 ^ 1 [ i l ! s . s . " s . s s s . s 5 s ' 5 s ? I 3 | e | \ s • ^ s 5 s s B s g s s s e s s g K 5 s s s 5 s s B I U J l s i 5 | • I s ! | S | I e l i 3 | s l s . p s R s s s ? s s s s s 5 5 3 s g s ' s . s s s g s g ? ^ s \ ! § 1 1 1 M ' ^ [ Q i i i l c . 3 - l , s | I 1 ! s ^ 1 1 c f l _ < 1 I j l u | ' 2 [ . l s i i l l s i | £ | 1 § 1 l s i [ s | § 1 s | § 1 s | § s § 1 s I g s § 1 s I g § s g . l s I ] ^ 1 I s ! I I I ? 1 g l I I g s 1 ? 1 1 s s f s | I s ! l i [ s g g s g s § § g s g s ' g g s § g g s s § s § § o | o | o | ) o | o | o j o | o | o | | o | o l o [ o j o o | c i ] o | o | | o | o ] o | o | o | c i [ | o ] a s s s s s s s s s ' s £ s s • s s s f i K s f i s s s s s s s s ' s s ' s s g s g s s s | o | s ] g | g | s [ | ^ | s | s | » | s [ n [ [ 5 | s | ? | s | 5 g s . 5 s 5 s s . s . ; s s ? I 3 | g s ' ! ? s s s 5 s s s s £ I s I s s ; g s ' S I K I £ | S | 5 I l l s E E s E 5 s I s ? E I ^ s 5 I s s & 5 s s s t O s £ 5 s s s S ! s s . 3 s s . s S ! s g e s ' s s s ? e | e § 1 s | : s | | S | I l l S | S | s I 1 § 1 l s i I s ! § 1 § 1 I l l § 1 g | § 1 l s i I l l § 1 I l l § 1 g l g | g | § | g | g | g | | g | g | g | g | g | g 5 | ? | S | 5 [ 5 | 5 [ | 5 | g | S | S | 5 | 3 I s I l l § 1 l s i | s | § 1 £ | § 1 I I s l s l ? 1 W ' [ ^ W ^ I l l i \ ± W i | § ] j | w f e ] 8 : | I 5 | i t i £ | ? = 1 g | i | g l i l I I [ s a l i l l s l ! B : s : l I s : I s : I l § l l l ; I s ! 8 : 1 S | I s £ 1 g l I I s l s : I s l s ) s l i \ s l I I I s w l s i f t ; l l i i ^ 1 8 : 1 s \ & 1 £ ' s . s s : I £ 1 1 | i | ? | 5 | s s l s : S | s : | s \ I I I s w l s i I ; s l g s 8 : 1 1 1 s : s j s i g I ; s . \ ^ 1 C O 3 | l i t I ! s ; | S | | £ | § 1 s \ § 1 I § I l g l s | l s i | s | 8 1 | g | S | S s | s £ 1 S l s l 8 : 1 8 : 1 g | S | I S : l s i & 1 ? 1 s 5 8 : 1 s l I g | & \ ? I § 1 M c ^ l ! l ^ w s i l l I I g w l s i a ; l s l ! g 1 £ I S I s f c g \ i [ i W i § [ § 1 s s l f e S l g s l ' s g l § t i - n 0 ( ) 0 c 0 I T > I l l l s ' 1 C L 0 0 1 a . w L L a - 5 l i I I u I g u D ; c o 0 0 c m Q - I I i [ ^ i n 0 0 T — ! § I - I O S t ' i o z e i . O E S I . O O E L O E I . I . 0 2 1 . 1 . 0 0 1 . 1 . 0 0 0 1 . I r o 0 0 6 £ g 0 0 8 § c / 5 a g ^ o o z 8 £ 0 1 . 9 s . 0 o ^ s r o o z s O S t 0 2 ^ 8 Z Z Z l l ' . l o i . 0 . . O . D £ o o z 0 6 0 g ? g g 0 s ^ ^ o - ( U ) U O B E A 9 1 3 / • ^ ) ^ n C 1 " ) I ? I u l s ' 1 C L " 1 U a - , a . j r § 1 I 0 < C L 1 ^ 0 1 i n c ^ c m D - l i 0 " E \ s i n c o T — ; § u § " O S t ' 1 . 1 - 0 / E 1 . 0 £ £ 1 , O O S I - 0 £ l . 1 . O S l . t 0 0 1 . 1 0 0 0 1 . § s r m . . • 0 0 6 £ s 0 0 8 s . " Q § o o z - s s 0 1 . 9 s u O V Q c o o z s ^ ^ _ O S 1 7 0 ^ 8 l o w 0 . . . O Q £ o o z - 0 6 s ? g s s 9 r ^ ^ ^ s . • < 3 - 0 ( U ) U O f t e A S | 3 ^ ^ 0 ( ' ) u ^ L L a _ C L u - g , g w • • £ u s 0 L U u 0 r § ^ 0 ^ \ . [ O Z £ t 0 £ £ 1 . o o e i a o e i - i - 8 0 2 1 - 1 - 0 0 1 . 1 . Q . 0 0 0 ^ u Q ; c o T 0 0 6 C s l g s 0 0 8 c : ^ s r o . 2 Q . 0 § o o z • s s 0 1 . 9 c w u 0 o w C D £ 3 c o o z s I D c o 0 0 0 5 1 7 0 ^ s o o f . 0 O . Q £ o o z 0 6 0 £ 8 9 g g ^ t ^ 1 ^ . t ^ r • d - ( y ) u o ! ) E A 3 j 3 ^ 0 u - a - g a - a > g s ' 6 - • E c o u u - I U J O S f t 0 2 - E 1 . o e e i - O O E l . 0 £ 1 . 1 . [ s o z n ^ o o n Q - u a : 0 0 0 1 - c o ^ 1 - - u < t > U ) 0 0 6 0 Q . £ g 0 - s 0 0 8 ^ s a > . " £ a § o o z 0 ( ) • u 8 c s 5 0 1 - 9 I x J = c o 0 c o O f r S • r o c C D a . o z s c " 0 O S t 7 - s o s r c o _ J : : O O £ L § i n 0 3 0 6 0 o . o e o o z 0 6 0 9 s s ^ s ^ g i ? g i ? h ~ u ^ ^ ( y ) u o f t e A S i g ^ n 0 u r . ! s u o r c o 0 0 I s C L d L U y - i u - a . l a : j " ! ^ S [ 0 s f c W g 1 * | * i ( s \ ~ s I f ^ r o r g - f Z 0 c o 0 ) n C L T - g • V , 0 ) c : w ^ i n g s u £ £ u ^ g p . t ~ ^ T n I , i n I ] c o c o s 0 ; 6 q 1 . 0 - g [ s ' 3 - [ s - s - s [ § . ; . . : - ! . . ; . | . : . . | - . . . . - - - - - - f I I ) c o g s 8 0 s o s i n n o c o u - i n o c o i n n o c o i n n o c o i c o o o c o o o r ^ . r ^ r s - h ~ c D c o c o ( £ ) u ~ ) L n L n u ~ ) ' < d - r ^ ^ - ^ - r ^ . r ^ . r ^ t ^ r ^ . t ^ ~ h ~ i ^ - ( ^ ~ N - r ^ - f s ~ r ^ - N . • d - ' d - ' * ' t ^ ' ' d - - ^ - ' ! t - - ^ - ^ f ^ ' - < t - ' < " < f d ' ' d ' - « t g 3 m ^ u S C t : " s l - f n r c I i l - D s l I I ^ f e ( U I I - " " i n o ; 0 0 8 u - > s 3 I s C L I C L I S i 5 - • t r . 0 - J c o s 0 J S w • - ^ £ ~ i C D m - g \ - s 0 [ s - s - s C M C s l - s 8 s T . I 1 [ i | ' i f i ] i ; T - i - i [ i I ( | r T " r l ' i ' I i ) ' i ' l ' I ' n o o o L D c o o G O L n r o o o o L O r o o o o i o n o a ) C D o o c o o o o o r k - . r s - ^ - h ~ . c £ ) c £ i c D C D U ~ i t o u ~ ) L n r ^ r ^ t ^ - r ^ . t ^ . f ^ i ^ i ^ . f ^ r ^ ' < t - ^ t - ' ^ - ' ^ - ' ^ ' < t - ^ - ' < t - < d - - ^ t - - < t - ^ ' ^ - 0 g j g + 3 s c o ( y ) U O R E A 9 1 3 ( y ) U O H E A 9 1 3 u I s a - u L U C L w : L L a - ^ s | 5 - s I . " r i " s < s Q - ' 5 . u g Q : n c o 0 3 ' s s : 8 m ^ a . § : s s c : a s 1 0 c o s • J 3 g u o g § : ^ t - O ^ t - ; 1 " * L O I I I G O w i n s c r 0 L O n o o o i n n o o o i n c o o c o L O c o o o o L O m o o o i n c D c ^ o o o o o o c o h - r ^ r ^ - . r ^ . c D C D c D c D L n L O L n i o ^ t ^ t - T § - s [ s - s - s n - s [ s - s - g 0 c D c ^ o o o o o o G O h - r ^ r ^ - . r ^ . c D C D c D c D L n L O L n i o r ^ r ~ - 1 ~ ~ . r - r > - 1 ~ - r ~ - t t ^ ' < d - ^ l - - < t ^ ^ ^ ^ ' < t T t - ^ - ^ - ^ r ^ ( U ) U O B E A 9 | 3 g ^ s I ^ s w I s a - " U J y - i " - 0 - , Q : w I S § i u s I f c W l ^ * i " | ' = i S < Q - § u c E 2 C O Q c o ^ t : £ § ^ § B . Q . c 0 ( D i n D . u s | ? A _ : O ^ f c o " ~ T w I i n K | - - - : c o $ 6 0 0 T s : [ s : ^ g - } s • [ s r T i ] i l I I I I — 0 0 L O C O C r o o o o L o r o o o o L O r o o o o L O c o o o o L O o o G o o o c o i s ~ - r ^ r ^ . r ^ ~ c D c o c D C D L n r ^ . i ^ . r ^ . t ^ . i ^ f ^ . i ^ r ^ . r ^ r ^ r ^ - r ^ - r - h - " ^ ' ^ ^ • ^ • • ^ - • ^ - ' ^ - ' ^ - ' ^ - ' • d - ' t t ^ t ' ^ - ^ f - ' ^ t - ^ - ' ^ - t t - [ s s s 0 W - s - s - g - s 0 L O L O L O ^ r ^ ~ r ^ ~ ? ( y ) u o i } e A 9 ] 3 0 u I 3 ^ 1 ! 1 s l ^ 1 n i I E 1 c o ^ 0 0 j ^ 1 . s § - 6 ? ° " a . a > 1 ^ " L U y - i u - C L ; D . w 0 - s l ^ w § e i " e g ' : • 1 0 s . 0 ^ ) - U - ) - § ^ § n ^ § - " g ^ I § ^ p ^ s r o 0 o o c o c o r ^ . r ^ - ^ t - - ^ - ^ r t ^ • < • o c o L D n ( ^ . t O t O C D N ~ t s h ~ C - ; - s o c o i n n o c o i n C D L O L O L O u - ) ^ " d - 0 i ^ r ^ - 1 ^ r ^ i ^ ^ - ^ r ( U ) U O R E A 9 1 3 I 5 ^ u ^ L L £ L L U 0 Q - M u - < s s w • f s . s I I ± S ! ? " s - ^ 2 ^ ^ c i l w s ? 1 c o i " ! + L O 0 0 c o I I M D ; l , . . i j . . I . . i . : . . i . . | . . . , l 4 . i . - . | . - - " " - - • • _ o . ^ - i n s A . - „ . . _ ; • • • ! • • • " " " - " " • " " • " • " " I ^ D - u L U L L | L L D - I Q : w I ^ ^ 1 6 s w f f " s | i | i I 1 T - I - 1 ' T ' I ' I ' l ' 1 1 I ' 1 ' I ' l l l ' I ' I I I J I n o o 3 L o n o o o i n r o o o o i n r o o o o i n r o o o O L O 0 1 C B C 0 0 0 0 0 0 3 N . l ^ r ~ - l ~ ~ t D ( D C D C O L O U - ) l O i n ^ t - ^ t - h - ^ 1 - ^ t ^ t - ' 4 - ^ t - ^ - 0 i » - r ~ ~ ^ l - ' d - ( y ) u o i t B A e i g • ^ $ u C d 0 0 " g , 1 1 ^ Q : S 0 u T T § : [ s : i ^ - s ^ } 8 - ^ s [ § ^ - g • ^ s K > S I i n ^ £ § 5 ^ 3 1 ^ 3 c o — J i n 0 0 T ~ 6 0 I B l • O t l - § 1 I I • : • ! • • : [ S I ? 0 ^ n ^ - s ^ - s - - ? • - - - - - - • • ; - • I ' r ' i ' i ' i i n r o o c o i n n o o o i n m o c o i n n o c o i U ~ l ^ 0 > g g g s 0 ( D U 1 i n ^ ^ N . r ^ r ^ r ^ - r ^ i ^ r ^ ^ • • < t ( y ) u o ! } E A 9 ] 3 I s ^ u L U 0 - i L W I ^ N ! u s s . " s * t " s g u 0 1 c o " . I " : § S w s l i j " ^ 1 ^ c o _ J L O c o 8 I : i n s . o ^ r i n i I I I I [ I 0 G O L D C O I c u w ' s ^ s 0 - ^ n ^ t s i r ^ - g ' I ' I ) 0 0 L D • ^ f ^ t - 0 c n c o o 3 Q o c o r - r ~ r > - ^ - c D ( D t D r ^ r ^ . t t - ^ f ' ' d ' ^ ) - ^ ^ t ^ i - ' 3 - ^ i ' ^ l - ^ t ' ^ l - - < f d ' ^ T ^ - ^ - - ^ - t t ' < t ^ i - ( y ) u o f f e A S i s M n u Q - i u L U Q _ L L 0 - j ^ 1 5 1 s w i n 9 f 0 r s < a - u D ; c o 0 0 c _ r o C L i 0 1 C O _ J i n 0 0 ^ — 0 0 s a " § . 1 ' s n i 0 Q : s 1 0 5 I I w Q : ^ M — Q ^ . . . , . - : — — 1 0 s s r § ^ s ^ § [ s ' s ^ s [ s ^ - g g " ] " " - " 1 [ I j ^ - ) 1 I > 1 I I I [ I I ; I I [ ' — [ l l l ) ) j L n r o o o o L O c o o o s L n n o c o i n n o c o L O i o ) C T ) c n c o o o o o o o ^ - . r ^ r ^ . N . c o c c i c D C D i O L n L n L n - < t « ^ - r ^ f ^ - r ^ r ^ . r ^ . r ^ i ^ . r ^ . ^ i ^ f ^ . r ^ r ^ t ^ t ^ . i ^ • ^ - • ^ • ^ - ^ t ' d - - < ' ^ ' ' ! l - - ^ - - < t ' d - ^ t ' - d - - ^ ' 0 ( y ) u o ! » E A 9 [ 3 I 5 i D - 1 l . 9 I L U D . w D . • ' s 0 i l t e 1 1 £ u I - - s w ^ - 1 — i £ 1 u ° - Q ; S c o c o 1 , : . , , i • } H c J ° Q - t ~ : . . I " i 0 I ^ i § I l l ^ ? S a 2 § s • 0 • < » • " ! ^ U D 0 0 0 0 0 L O r o o 0 0 L O c o o 0 0 i n r r ) o o o u " > c o o o o i n o i c 3 i o o o 3 c o c o r ^ . i ~ ~ i ~ - r ^ . t D ( D C D u 3 L n u - ) i n i n - ^ ^ - ' ; t - < t ^ - - ^ " ^ - ' ^ - ^ ) - ' < t ' < t - ^ ' < d " < t - t t < ^ ' ^ - ' ^ - ' < t ' l d - ' ^ - ( y ) u o g e A 3 | 3 - I - ? - g • s • § r r > s 8 s s 0 - + = ; ^ s a > C L ; " ; L U u - D - w Q _ ^ i 5 s f c W j ^ l ^ 0 i ~ £ < Q . u I T c o C O I I c - t o g K g c - ° 0 0 3 i n C O § ' I § n i w I - ^ I I ^ \ 3 • 0 ~ ! t i ^ » j - . I l 5 — ^ — 0 I : : : I 1 ^ - 1 : - 1 . ; . . U r § ^ 0 \ - s t § . l N - 8 [ s s I ' 1 ' T ' I ' [ " ' ' p I J T ' I ' I T ~ T " ' f J ] I T ~ I l | i i J l ' I ' I n o c o L n n o o o i n n o c o i n t ^ - h - r ^ - c D C D C D t D L n L n i n u " ) i ^ . ^ . i ^ . i ^ i ^ i ^ . r ^ . i ^ t ^ . i ^ - r ^ i ^ r - ^ - - ^ • ' c t - ^ t - t t ^ - ^ - ^ T t - ^ - ^ ^ t ^ ' . t . ^ - ^ ^ t t ^ - ^ - ^ ( y ) U O B E A 8 1 3 • o I a - i a - " I S u j \ u a . w u a = - s O T I i ^ r f s s < Q a . u ? o r 0 s c o c a . c o s d • • g S y - ~ - t r t T t T 1 ^ C D 1 0 s J O - c g ^ Q _ § u ^ = s 1 , c w m w 0 ' 3 - 0 & ^ ^ & - £ 3 ^ c o i n i n s C O w ( K 6 0 T i i | i | i | ; ' i | i ] i | i | i i — p — - m — i 1 1 u i | o o o L n n o o o L O r ^ o o o L n r o o c o i o c o o o i s ~ . h - i s - . h - c D ( r ) ( £ ) c o L n L n i o L n ^ - ^ f ^ . r ^ f ^ ^ - r ^ r ^ N . i ^ i ^ - r ' ^ r ^ r ^ r ^ . r ^ N . i ^ • ! t ' ^ r ^ r t ^ i - ^ ) - ' 4 - ^ t ' - q - - a ' ^ t " ^ - ( y ) u o ! ) E A 3 ] 3 • ^ s w 0 r o • r l - s ^ - s ^ 1 I s I I L § w l ( N - s - g u . i § w E g . u e 8 w ^ u ' „ ' 1 ^ ^ U ~ ) 0 0 § I 3 d ^ 1 S ] c o C O ~ £ i I a ) C L u Q - i C L " 1 : E 0 ^ s c o s * t " s 1 ^ 3 < D _ ^ C O 0 0 g • O ^ s t - i n s I • s s I s n s s § g g g > i n i n n o c o i n n o i o i n n o c o i ^ - i ^ . r ^ r ^ . ( D c o c D c o L n L n i o u ~ ) T d - r ^ ^ . i ^ i ^ r ^ t ^ - r ^ . r ^ . r ^ t ^ i ^ . f ^ r ^ ' d - ^ t - ( U ) U O D B A S 1 3 0 I 3 D - ! 2 a . w D . u i J ! * i " s ; . . . . . I : i l ' \ i . 4 - J - U - . - . ^ . . l j - 1 Q - c t w s s ^ 0 u i . I ! ' s ? § } I C O a ; i ^ • 0 - d - - l i t ' H i ' l T § ^ \ - s - ^ c o - 8 ^ 8 ^ / i n s ^ - s _ . _ . ^ s - s L D r r 3 o o o i n n o c o L O I I I j _ l ) m 0 o o I s ; L L : a - : u L U y - I Q - ^ I s I j I • I 0 E Q $ u Q ; c o c o g ^ C T " I E . 1 § = - i w ^ £ Q : S £ I s w c C s i w o c o i n c r ? o o o L n r f 3 0 o O L n r o o o o L O r r > o o o 0 ) o o o o o o o o i s ~ - r s - r ^ . r ^ . c c l c o c D C D i n L O L n L O ' ^ - i ^ r ^ . r ^ . i ^ . F ^ . i ^ - N - r ^ . • ' t ' d - ' d ' ^ ^ r ^ ^ t ' ^ t ' d - ^ t - ^ i ' 0 ^ • ^ t - ( y ) u o f f E A S j ^ 0 ^ m 0 " w " U K - Z 3 ( 0 — I i n c o s • O ^ l - § - - . i . . . . , . ; - . . ; - - ! - ! . - - - . . - - - . . . . . - . - - . r § • o - - § - s n n - s § - " I - § w M - s - 8 - s . : . . ^ . . . . ^ . . [ T - I i 1 i | ! | i | i | i - j - i - 1 i j < f r i i [ r j i ( , j i - j i ] r - j - i ) i T - i j 0 0 0 0 L D C O O C O L D ^ . N . h - ( D C D C O C O U ~ ) U ~ ) ^ - N . t ~ - ( D C D t O ( O U - l i n t ^ - r ^ r ^ . h - r ^ . r ' - t ^ N . N . i ^ . ^ - r ^ - r ^ . r - . r ^ - r ^ r - . N . r ^ - s . • d ' ^ t - ' f y - ^ t - ' t ^ t ' ^ - ' t ^ i - - ^ " ^ - • ^ - • ^ - • d - ' ! f - ^ t ' ' i t ^ i - ^ t - " t ^ f ( y ) U O H E A 0 1 3 I 3 I S I D a - ; a : y ; s § i u s m ? l I ; w s s i n c o T — 6 0 — - J r i ^ ^ § • I s [ - 3 [ " g - s § C M s 0 W - ^ [ s . . . ^ § h S - ; • • ! • • ; " | " : I ' l 1 ] I ] • — ] ' I I ! • I 1 1 1 1 1 ] 1 1 L n r o o o o L n r o o o o i n r o o c o L n r o Q ) c n c n c o c o G o o o r ^ - i s - r ^ . h - c D c o c D ( D L O L O L n i ^ - r ' - . i ^ t ^ - ^ r ^ i ^ . t ^ r ' ^ r ^ r ^ i ^ . ^ r ^ . r ' ^ i ^ . f ^ 1 ^ - ^ ^ 1 - ' < t - ^ - ^ f - 5 8 5 i ^ - . ^ r ^ . r < ^ . i ^ . r ^ 0 t 0 g ( y ) u o i } e A e | 3 ^ i - u I 5 i u - ! 0 - : u i L U L L . | L L Q - I a : w ^ - - £ u i ^ l t i " s ± < Q _ u o r 0 0 0 0 c m C L ^ 0 " c o — I L O C O 8 0 ^ c I 0 a > w I 0 s . I I ^ . ; . . . . . . i n s T i n § a ' " ^ - L — ; ^ ^ s [ § [ s n \ - s ( N ^ g - § s 7 ' I ' ' T - r - l ' f ' i i - ' i ' i ' r ~ ^ i ' i I T - I - 1 ' I ' ( ' T l ' I ' T L n n o o o i n c o o a o i n c ^ o c o i o n c T ) C D c n c o o o c o c o r s - ^ - r ^ . r ^ c D C D C D C D u ~ ) L n N - • < t ^ i - - ^ - ^ t - - < r ' * - d - T ' i } ' ^ ( y ) u o ! } E A 9 | 3 0 i n ^ I t L L a - I " L U a - I 0 - j w ^ 0 s c o i I ' i 0 g o r c o s ! d i " u a ^ c o " . 0 ) 0 : = s c o _ J L O c o — c § I T T T T j T 1 i T ' p i r j ' „ : . . „ ; . . . . - . ; t O ^ I I I I I I I I i T ^ n - i - i l S § g g g g S t n ' . p 2 1 g g i 8 1 S § g l t 8 1 S g ? ^ t - ( U ) U O [ } E A 9 ] 3 - r l • } s [ § - ^ ' [ § - s [ s - g - s 0 I 3 L L 0 - ! u t U U . I Q : s i : = ? l o ? 1 s s I f c w l ^ i ^ " r i s < " g l 0 0 0 0 I - i n $ I 0 3 w c 0 3 a ; t e _ ^ = 3 . . . , I s I I ' - • ] , - ^ 1 . W i 1 - • O ^ l - c ^ 0 ^ ^ 5 - I I I g " ? < 5 c o t ^ 0 0 : ; ' : - 1 1 1 - . . ; . . . ^ . . . . m m r s - s 0 - s n - s L " g - s l - § w - s - s ? c ^ o c o L O c ^ o c b u ^ n o r o i n ^ c o r - - i ^ . ^ - t > - . C D C D t O < D i n i n L D L n - d - ^ - r ^ - ^ • ^ - • ! l - f f l - ' < l - ^ - t ^ l - < S l ' ^ - - ^ ^ - ^ t - ^ - f l ' ^ t - d - - < l - - < t ( y ) U O I } E A 3 | 3 0 ? I J | n - I " U J L L I y _ a - | Q : M ? i 5 s I I t 5 5 ^ " • - T 3 w ^ " 1 ~ 1 < s ! { _ T c o S - ^ - ! ^ j ' r - s H ; l : ; g ^ § T . . . . . ; . - i I ! : 1 ^ 1 - £ m ^ g ' s u S S i n " T O ^ 0 0 _ o ^ r g \ I i r M B . - T § } s ^ } g - 8 4 C M T ^ " | i 1 ? ' [ i j I ' [ - T | i | 1 I I T " 1 I 1 ^ n ' 1 I ' T ' I I i j i | l l ' i 1 n o c o i n n c n o o c o o o c o f - r ^ . r ^ - i ^ . c o c D i o c D i o i o i n L n t ^ - i ^ r ^ r ^ . i ^ - h - . r ^ i ^ ^ - r ^ . r ^ . ^ t - - ! t - ^ - M - ^ ' ^ f - s f ! i ' ^ t ' ^ t ' ^ i - - f l - ^ i - ^ r ^ i - ' a - ^ - ^ i ' ^ t T r ( y ) u o ! ) E A S | g 8 s g s 0 g s I I i n J < c : m C L ^ s j l I I ^ - s 1 D c - r o Q _ c t : I a - 0 I - " & l i - £ 3 c o s s g I f c u L U y - i y . D - I D : ^ ! : = S : 0 - s w § 1 1 i * f 0 r s I Q - 1 1 s I c o ^ i C L K s " u g - ^ 6 ^ § ' — i i n I D I I c o w § • o - ^ r ( D ° < - g ^ s 0 ^ - ^ ^ [ s ^ - s h 5 1 : 1 i ' i ' - - ) ^ ' i ' [ ' i ' i ' i ' i ' i ' T T ^ i I I B - I ] ' i ' i i n n o o s L o i C T i C D O O C O O O C O I ^ r ^ f ^ i ^ r ^ I s - r ~ . r ^ - 1 ~ - - M ' ^ t ^ t - ' d - ~ S f 4 - - S ) ' ' ! t - « T < t ^ - - S t ' ' S t - ^ ' - ^ ' t ' ^ ^ t " ! t ^ t ' g g g g g s s g ? r ^ . f ^ r » - . r ^ - r ^ - ^ - ^ - i ^ ~ . r ^ 0 i n ? • d - ( y ) U O R E A 9 1 3 I 5 a . I u U J ^ ! § L L . Q - U ) s s i t w ^ l * f ^ r s s \ 1 ; . 0 ^ 1 - a , < ' , » - - T S } s • ^ § . . . , 4 g r r ) - ^ M r \ ) 0 0 0 c n c n c o c o o s c o i ^ . l ' - l ^ f - - n - n I s ^ - g - s C D O i 0 0 G O 0 0 ^ t - 1 — r i n • ^ t - • ^ t - 0 r ^ . j ^ i ^ . r ^ . r ^ . r ^ t ^ i ^ r ^ . r ^ r ^ f ^ - r ^ . f ^ . r * - • ! r - ^ ^ ) - ' d - - s t ' ^ l - ^ t - - ^ - - a - ' ! l - ^ ) ' - ^ t - ' a - ^ t - - * ( U ) L J O ! } E A 9 [ 3 a i : Q - i d • U J U - i L L C L i a : W I ^ $ i o s . w ^ * t s f u a : c o 0 0 - " a : 1 1 u 0 ( D _ 1 1 0 c o 0 . § i n • ' s I D w I 0 § T I I W 0 ) Q : ° • 0 - v t I : ~ r s ^ L i ' ? j i | i l i ] ; - ; - , - [ , ' i i j r - i - i • | i | i ] T - T ^ I ' l - l ' I i | i | i | i n o o O L O n o o o L O r o o o O L T i n o o o i o n o c o L O C D C T i G o c o o o o Q r ^ - t ^ . r ^ r ^ . c D c D C D C D i n i o u - i L n ^ r - t ^ - i ^ - t ^ t ^ r - N - r - • ^ ^ • ^ • ^ • ^ ' ^ - ' ^ • ^ ^ - ' ^ - - ^ ^ • ( t ^ t r § [ s 0 - s - s 0 - s I 0 W - s s g 0 ( y ) u o » E A s | g f I 3 < ^ ^ 1 ® i i t s ' ! y - a - 0 L U L L a . w " g m l l t E I I ~ 1 ^ s . I ^ - 0 ^ s J S i i ^ 0 ^ ! ^ I T " i n - c | — ! § § . ; : ! 8 1 y - : . . : . . j a . 1 . • " s ? L L w C L s u s 0 • [ - - i | i i i i i - n i i n n - - i i j 1 1 1 1 1 | I T I ' i i - n - r i ' I ' l i i c o i n r o o c o i n r o o o o L n n o Q o o o o o c o ^ - r ^ - i ^ r ^ . c D ( . o c D ( D i n u ~ ) L n i o ^ t N . ^ - i ^ h - . i ^ N - l ^ r ^ ^ r - . i ^ - ^ - r - - ' < t - ^ - ^ - ^ - - < t T f ' ^ - ' ^ - ^ } - T t ' ^ - - < t ' ^ - ( U ) U O ! } E A 9 | 3 T g ^ ? [ s [ s | i , [ s I \ - § w C M - g - g - g 0 C D u I 5 ^ ! 2 a - I C L J " ^ 3 . ; u - a s w I i s 1 s I c < s Q ; | 0 0 I D r o l ' ^ - ' u 1 ^ f f l 5 i I 0 ) Q : 3 s - ^ 8 i n s . 0 : ^ 1 - § 1 K m ' ^ . i n - $ l § - s n ^ - g ^ s s \ T ) C ^ Q C O t J T ) C ^ 0 0 0 \ ^ C r ) Q a 3 o o c o i ^ - ^ - - i ^ ^ - c o < D t D C D i n t n u - ) i n ^ • ^ • • ^ • ' i l - ^ t " i ) - - < t ^ i - ' ! t t } " d - ^ t - - < " d ' t t ' ^ f - ^ f < t ^ ' ' d ' ^ t - ( U ) U O I } E A 9 | 3 0 • a I u U J L L Q - c o C L I ^ J s n * t ^ r s < I a - j s u s Q ; § ; ! ^ , ! j s § a - • 5 - i l I I s s i n " w ^ 0 . 1 . . . . . § r I ; . . » - s 1 0 - s • § 1 n • s M C M g 8 s 0 C ^ C D C D C O O O G O a O N . h - N . N . i n < t f r ^ . i ^ . i ^ i ^ . r ^ r ' - . f ^ . r ^ r ^ - i ^ . i ^ . ^ . i ^ - i ^ i ^ . i ^ . r ^ r ^ - i ^ i ^ ^ - • d - ^ ' i t ^ t ' ^ - - ^ - - < t ^ t - ' d - ^ t - ^ l - ' d - T i - ^ t - ' 3 ' ^ ' ( y ) u o ! } E A 3 | 3 § > s a - ; 0 L U Q - s a - O T s s l f c - " j ^ r i " 1 - s < s Q _ C D ! 1 o o • £ 0 0 c & ^ c I s w g I s c o c - a ) 0 £ C D _ J i n 0 0 8 I a 0 s . i 0 I ] w a r i n s • o , ^ - - s ' < • l § - s n s s C ^ - ^ s § " C M § ; • • • " • • l i ~ A ' I * . ' I : r - j * I s - § 0 L n n o o Q L O r o o o o L n n o o o L n r o o o o u i n o o o i n C D C T i O ) o o c o c o o o r ^ . N - r ^ r * h ~ c D ( D C D C D i O L n L O L n ' ^ - ' < t f ^ . r * ^ - r ^ ( ^ . i ^ r ^ . f ^ . r ^ r ^ i ^ [ s ^ ( s ^ ^ ^ ^ ( ^ . ^ ^ ^ ^ . . i ^ . ' 3 - ' a - ' d - ' f l - t T j - - < f f t ^ t ' t - s j - ^ f d - ^ t - ^ ) - ^ t - ^ f ^ t ^ t - ' < t ( U ) u o g e A s i g I 2 a : l a : u L U 1 5 I I § g ^ u d a . m 0 ^ s c ^ u r ' i ' I f f " 0 3 - J ^ i n " c o w 1 0 3 3 • g w a = a . g - » ? • ^ § w 5 I C D J . i I I i 0 0 t t : • ; T i ^ [ s } s ^ t s I ^ § w N - g - g c o o o o i n r o o : ^ ^ ? D ^ S c o r ~ - r h ~ - r ^ i s ~ - c o L O r o o i n i n i n 5 0 i n g I s - r ^ . r ^ ~ ^ - • ^ - ' ^ • ^ - • ^ ' ^ ^ ^ - • < t < < t ^ t - - ^ ^ - ^ t - ^ ( - ( y ) u o s E A a | 3 u I s : u L J L L Q - w D - 5 s c o I ' i " & < C L ^ 0 0 c o § s w n 5 § u " " D : 3 c o — i u - > s i n c o 0 . 1 . : , _ ^ . • O t i n ^ ^ § n n I s - ^ h s j u - a - ; 0 ; L U a - | a : w : s ^ ! o - s § - w I • I " s ^ ^ ° ? C O 0 g c - ( u w g D " S ? £ I " ^ ^ ° s s 0 " M w a : = i C D _ J i n c o < t — 6 0 w • o ' - ^ - i n — • ^ • • - - - • • . . . - - - . - 1 i ] u i | i | u ' i : i i | i ] i | i | i i i 1 i T ' i — n — T - T r r > o o o o o o o o r ^ f ^ - f ^ ^ - ( D c o c £ ? c o L n u " ) u ~ ) i r ) ' ^ ( y ) u o R E A S i g • 4 " ^ " " ; " " : " " ' I " " — ' • • " " • " • - " • • " : i 0 ^ 0 ^ s - - ! V n - - g 1 ^ § . ^ g 0 - s - s ^ s h s g ^ = ! M I 1 [ - r | 1 r - i [ i I ' T | i i ' r - i - i | p - i ] F - T - n o o o L n n o o o L o n o c o o o r ^ h - N . f ^ - c D c o c D c o i n L O L n u ' ) r ^ i s - 1 ^ - i - ^ i ^ ' < d ' ' < t ^ t ' < t t t ' ^ - < t ' ^ - - ^ - ' t t ' ^ ^ ' ^ - T t ^ t < < d - 0 ( U ) U O R E A S 1 3 3 ^ ? w u - f f i D . a . i ^ i O - s w u s u L U u ^ . 8 i n u • s < < ^ a . Q - E • < } • u 0 t O £ Q ; c r [ - § c n c o c o ^ 0 0 0 0 s % n . . . . . _ . L g § b n M ? £ < % L S m r o n g • ^ E S i n D - s < u £ L S § w u O i s s s S c 8 s c L § w Q J ; n c ^ u " " ^ L D 0 - < t c o § C D Q : £ 1 8 £ - 5 _ L 3 3 s - c o r o s L § $ L O L O 0 0 c o 8 0 i n t 0 h g 0 § 0 0 w C d 0 T 3 I s ^ u U J L L I y - a - I a . j r s ] s § . w r ^ " s - - - • j - ? 1 ! - , i i ' ; i i ; " i ' . . j . . , . O l t - ' I I 1 - I - I ' [ * ^ T ' i l r - i i ) O O O L D r o 0 C O L O - 1 - 1 ( 1 - T - T ( 1 " [ - 1 - \ 1 - 7 • ( - T l I I ' I - T o o o L o n o o o u " ) r r ? o o o L D r o p c p L O 0 ' ) C O C O G Q O O f ^ r ~ - . r ^ ^ . C £ ) C D C D C D U ' ) U ~ ) h ~ l ^ . ^ r - N : ^ - i ^ r ^ j ^ - r - • < t ^ r ^ i - ^ t - ^ ^ t - ^ f ^ i - ^ f < t - o - - s ) ' ^ f ^ - - s r ^ t - ' ! l - ( y ) u o ! } E A 8 | 3 _ , . . ^ g i n ^ } § . . . ^ ^ g - " g c " [ s I [ s w F 5 - s - 8 - s • - [ - i i i ~ } ~ r ~ { i | ' 7 ' I i ' | — i [ I ' I ' - T - I r T - I T i I ' 1 - T - 1 I - I — | - T o o L o n o c o L n r o o o o L O c o o a o L n r o o c o i o C D C D C T ) O O C O D O C O N - l ^ . h ~ . h ~ . U 3 ( D C O C D L n L O U ~ > L n ^ - < < t [ ^ - r - - . t ~ ~ - l ^ r ~ . r ^ - i ~ - . l ^ - r ~ ~ r ^ - r - f ^ - i ~ ' r - i s - i ^ . ^ ' ^ ) " < t ^ t - - ^ ' ^ - ' < t - < t ^ t - ^ ^ - ^ - ^ - ^ ^ t - ' < t ' < t ' ^ - 0 ( y ) u o f f E A S | 3 c o ^ - > ) n u I ' D I 5 : L L Q - u i L u a - i D - J | ! 5 ^ - s S t W j < " | * ^ u I ~ m < Q _ u 0 ^ 0 0 0 0 c _ m Q - c ^ 0 1 c o — I i n c o 8 ' s I w ^ ( 0 s D I 0 i s t g r § ^ ^ § ^ n - T - • o ^ s L O s ^ g C M L § M s § g 0 I [ I [ I ] 1 ) 1 1 1 I J 1 1 I I I I j I I l ] l j — ] l l l l l i n n o o o L O r o o c o L O c o o o o i n n o c o L n n o o o L n L t o i c n c o c o o 3 c o r ^ i » - r ~ . [ ~ - - c o c D t O t o m L n L n L n - ^ - ^ - r < ^ i ^ r ^ r ^ r ^ . N . i ^ ^ - ^ • • f l ' ^ t - ^ - ' s l - ^ t - - f l ' ^ t - - ^ ' ( y ) u o R E A s i g I s ! T — l u - a - u I D L L C L c o < s Q _ S I I c o 0 0 . " ^ s s ^ £ 0 C D L O " " ^ g • O ' s f 0 0 1 0 s s c o f c a . ^ d ) • • E s u u . § i n L S ' » ^ § • d - ^ s c o ^ 8 n p g C M i ^ § C M g s i 1 ( D s ' y - 0 - ; u ; L U y - i L L a - I a : ^ | 5 s § l t e - w ^ 1 i * ^ " 1 ~ i S g u Q ; 0 0 c o I I s s g g g g g g g s s s g g s g g g s s g ? ^ ' h - . r ^ . ^ . ^ r ^ - r ^ r ' ^ i ^ i ^ . r ^ . r ^ . i ^ . r ^ . r ^ . i ^ . f ^ . r ^ - r ^ r ^ . r ^ ^ i - - s t - ^ t - - d - ^ t ^ t ' ^ i - ^ t ' ^ f s i ' ' ! i - ^ r ^ ) - ^ t ' ^ f ^ ' - d - ^ t - - d - ^ r ^ r ( y ) u o . 4 e A 8 ] 3 0 c J O Q _ c - a ? 0 i 3 c o _ J i n 0 3 0 0 I s ^ I C L § ! I g I I w Q ; r § [ s 0 n ^ ° ^ . o - i ^ - . . . . 1 0 - ^ ^ ^ § $ $ 5 m ' I ' I ' i ' i i i i I ' l ' i ' l r o o o o L n n o c o i n n o c o o o o o Q O c o r * - . • s t - ^ i - ^ t - . ^ § P t M S s c o ^ § ( N s s s 0 5 r o o c o i ^ r ^ f ^ ^ - c D c o c D C D t n u - i t n i n ^ t r ^ - • d - ^ t ( y ) u o [ } e A 9 | g s ^ u - w u - t e g ) Q - , a - ^ ^ • f D . • ' E w 0 J i s u L U u , _ . , § L D < ^ Q _ ' s • i t - 0 s C d ^ § w 0 3 • < • 0 3 0 . ^ s s n T 3 5 L 8 c : s m n g > a . v s s 0 N T 3 s s c w & g ^ $ 0 £ n q D _ • O ) s 8 r o I ] V ) 8 ^ ^ . . ^ . . , . . L . . , . . i _ . . . _ ^ ^ ^ ^ ^ K L O T " 0 3 6 s s 0 q i 0 ' I ' I 1 C O L O • ^ t ^ [ 1 1 I I I [ I ] ! [ l [ l j I ] I j 1 1 1 j I I l l l l l l l [ f i n n o o o L n n o o o L n r ^ o o o L O r o o o o L O r o o o o L O C n C D C n o O O O O O O O h - N - l s ~ . f ^ . C D C D C D t D L O i n N . i ^ . i ^ . r ^ . r ^ i ^ . ^ - ^ - ^ N . i ^ - r ' - . r ^ - r ^ . r ^ . i ^ h - r ^ i ^ i ^ . r * ^ ' ^ ^ ^ T ) " ! i " ! r ^ i - ^ i ' ^ i - ' q ' ^ i - ^ i - ' ! r ^ ! - - ^ t - ^ f ^ - ^ - ^ ( y ) u o ! } B A 9 ] 3 C D N:\5659\005 NWX Phase 1 Major Sub\04 Design\Flood Hazard Analysis\Table of Contents.docx APPENDIX 3.5 VALLEY WEST SUBDIVISION- PUD DRAINAGE PLAN