HomeMy WebLinkAbout08-Mill Bldg Reno Sewer and Water Report
MILL BUILDING RENOVATION
Project # 06020.12
Bozeman, MT
FEBRUARY 2025
February 2025
Project No. 06020.12
SEWER AND WATER DESIGN REPORT
MILL BUILDING RENOVATION
BOZEMAN, MONTANA 59715
SITE NARRATIVE
The purpose of this report is to summarize the design of the future sanitary sewer and
water service installations associated with the Mill Building Renovation project in
Bozeman, Montana. The water service line will connect to the existing 6-inch main
south of the project area in E. Cottonwood Street. The sewer service line will connect to
the existing 6-inch main south of the project area in E. Cottonwood Street. The
following report will summarize the water and sewer design capacity calculations for
the proposed Mill Building Renovation project.
SITE DEVELOPMENT PLAN
The proposed project consists of one building renovation and an addition to the
renovation, and associated landscaping. This project is located at the corner of N.
Wallace Avenue and E. Cottonwood Street in Bozeman, Montana, see Appendix A.
SEWER
The proposed sewer service includes the installation of approximately 172-feet of 4-
inch PVC sewer line. The sewer service will tie-into an existing 6-inch vitrified clay
sanitary sewer main located in E. Cottonwood Street.
Capacity calculations were conducted per the City of Bozeman Design Standards and
Specifications Policy dated March 2004, updated March 2020 and the 2021 Uniform
Plumbing Code. Capacity spreadsheets are in Appendix B. The 4-inch sewer service
capacity at 75-percent full is 91 gpm using the minimum pipe slope of 0.0200 ft/ft.
The project area is zoned NEHMU, Northeast Historic Mixed-Use. The peak flow
calculations were calculated using fixture counts and utilizing chart A 103.1(2) in the
2021 UPC. The peak flow for the proposed 4-inch sewer service was determined to be 13
Sewer and Water Design Report Page 2 of 2 February 2025
gpm. An infiltration flowrate of 0.06 gpm was then used to calculate the total peak
hourly flowrate with infiltration of 13.06 gpm for the 4-inch service, which is
significantly less than the capacity of 91 gpm stated above.
WATER
The proposed water system consists of approximately 170-LF of new 3/4-inch diameter
water service. The proposed 3/4-inch diameter service will tie-into an existing 6-inch
cast iron water main in E. Cottonwood Street.
Sanbell and E1 calculated the peak hour water demand to be 13 gpm based on the
plumbing code and proposed fixture units (See Appendix B).
The City of Bozeman provided available fire flow test data from two hydrants located
near the proposed development. The static pressure provided from the model was 144
psi. The hydrants can produce approximately 5,295 gpm with a residual pressure of 20
psi. The International Fire Code for 2021 specifies 20 psi as the minimum residual
pressure required at full flow.
The building construction type for the Mill Building Renovation is type V-B, so the
required fire flow without automatic sprinklers is 2,250 gpm, per Appendix B of the
2021 International Fire Code. Since the building will be equipped with an automating
sprinkler system, the required demand can be reduced by 75-percent which is 562.5
gpm. The fire flow cannot be reduced below 1,500 gpm, so 1,500 gpm is the required fire
flow for the building. The existing hydrants near the development can provide
approximately 5,295 gpm at 20 psi residual pressure so they can provide more than
the required 1,500 gpm need for the proposed project. See Appendix C for a summary
of the hydrant test data.
CONCLUSION
Based on the assumptions provided above, the proposed 4-inch sanitary sewer service,
3/4-inch domestic water service, and 4-inch fire service installations will provide the
required capacity for the proposed Mill Building Renovation. Please contact Bobby
Egeberg, PE for any questions pertaining to this report by email,
begeberg@sanbell.com or by phone 406-922-4308.
APPENDICES
Appendix A – Site and Utility Plan
Appendix B – Fixture Counts and Peak Hourly Flow
Appendix C – Hydrant Test Data
MILL BUILDING RENOVATION
Project # 06020.12 APPENDIX A SITE AND UTILITY PLAN
PRELIMINARY - FOR REVIEWFILE:PROJECT NO:CAD:QUALITY ASSURANCE:DRAWING HISTORYDATE DESCRIPTIONFOR LOT C1, BLOCK 105, NORTHERN PACIFIC ADD BOZEMANUTILITY PLANMILL BUILDING RENOVATIONSITE IMPROVEMENTSBOZEMAN, MTC4.1 BE06020_12_UTILITY_PROD.DWGDME12/18/24SITE PLAN REVIEW02/07/25-----SITE PLAN REVIEW 2-------06020.120 20
SCALE: 1" = 20'
401020
MILL BUILDING RENOVATION
Project # 06020.12 APPENDIX B FIXTURE COUNTS AND PEAK HOURLY FLOW
Project: Mill Building Renovation
Date: 2/7/2025
Capacity Calculations
4" Pipe Flowing Full Capacity 0.27 cfs
4" Pipe Flowing Full Capacity 121 gal/min
Q/Qfill @ 75% full, 0.75 per nomograph
Capacity @ 75% full 91 gal/min
City of Bozeman Sanitary Sewer System Design Criteria
System Demand
DESIGNATION Demand
Peak Hourly Flow (assume Qin=Qout)13 gal/min
Infiltration at 150 gal/acre/day 79 gal/day
Infiltration gal/min 0.06 gal/min
Total Peak Hourly Flow plus Infiltration 13.06 gal/min
Result
Q/Qfull based on peak hour 0.14
Percent Full for 4" From Nomograph at peak hour 31%
Service Area
Project: Mill Building Renovation
Date: 2/7/2025
Capacity Calculations
6" Pipe Flowing Full Capacity 0.47 cfs
6" Pipe Flowing Full Capacity 211 gal/min
Q/Qfill @ 75% full, 0.75 per nomograph
Capacity @ 75% full 158 gal/min
City of Bozeman Sanitary Sewer System Design Criteria
System Demand
DESIGNATION Demand
Peak Hourly Flow (assume Qin=Qout)13 gal/min
Infiltration at 150 gal/acre/day 79 gal/day
Infiltration gal/min 0.06 gal/min
Total Peak Hourly Flow plus Infiltration 13.06 gal/min
Result
Q/Qfull based on peak hour 0.08
Percent Full for 6" From Nomograph at peak hour 24%
Service Area
2.5
X
X
¾” 20 19 17 14 11
¾” 39 36 33 28 23
1”
1”
39 39 36 30 25
¾” 1¼” 39 39 39 39 39
1” 78 76 67 52 44
1½”
1¼”
78 78 78 66 52
1” 1½”/2” 85 85 85 85 85
1½” 151 151 151 128 105
2” 151 151 151 150 117
1½” 370 340 318 272 240
2”
1½”
370 370 370 368 318
1”
¾”
2”
2”
1½”
1¼”
UPC Table 610.3 Standard Design Water Supply Fixture Units
Fixture Units # of Fixtures Total
4.0 X ________ = ________
10.0 X ________ = ________
2.0 X ________ = ________
4.0 X ________ = ________
1.5 X ________ = ________
2.5 X ________ = ________
1.0 X ________ = ________
0.5 X ________ = ________
3.0 X ________ = ________
1.0 X ________ = ________
1.5 X ________ = ________
1.5 X ________ = ________
Appliances and Fixtures
Bathtub/Combination Tub/Shower
Soaker Tub
Shower (per head)
Clothes washer
Dishwasher
Hose Bibb
Additional Hose Bibb (each)
Drinking Fountain
Service / Mop Basin
Lavatory Sink
Kitchen Sink
Laundry Sink
Water closet (1.6 GPF) 2.5 X ________ = ________
Water closet (1.6 GPF – Flushometer tank) X ________ = ________
= ________ Water closet (flushometer valve)
Urinal (flushometer valve) = ________
Table Values ________
Table Values ________
Total Number of Fixture Units ________
First identify the length in feet to the farthest fixture and applicable service. Then, cross reference the number of
fixtures, based on the Total Number of Fixture Units above to determine the appropriate Meter & Service, and
Supply & Branch size.
UPC Table 610.4 Maximum Allowable Length in feet - 46-60 PSI
Meter & Supply & 150’ 200’
Service Branches
If count is over 370 fixtures, water demand does not meet table 610.4 submitted by a registered Montana
mechanical engineers design, signed and stamped.
March 2023
2021 UPC (Comm/Res)
City of Bozeman Water Service Calculation Worksheet
Project Address: ___________________________________ Property Owner: ______________________________
General Contractor: _______________________________________________________________________________
Permit Number: _______________ Proposed Water Meter Size: _______________
*As a substitute for this form you can utilize Appendix M in Uniform Plumbing Code. The calculator results, as well as all of
the fixtures that will be used on this project will need to be submitted in lieu of this form.
Sec . 610 .1
Sec. 6 10.1
100’ 80’ 60’
*Appendix M requires the property to be identified as a water conservation Building.
_____________
as well as all of
CWSFU TOTAL HWSFU TOTAL WSFU TOTAL DFU TRAP SIZE TOTALDISHWASHER, INDEPENDENT DRAIN1.125 0 1.125 0 1.5 0 1/2" 2 1 1/2" 0DRINKING FOUNTAIN/ WATER COOLER1 0.5 0.5 - - 0.5 0.5 1/2" 0.5 1 1/4" 0.5FRIDGE / ICEBOX1 0 - 1 0 1/2" - -COMMERICAL - FOOD WASTE DISPOSER- - - - - 3 2" 0 FLOOR DRAIN 2 INCH FLOOR DRAIN- - - - - 2 2" 0 3 INCH FLOOR DRAIN- - - - - 3 3" 0 4 INCH FLOOR DRAIN- - - - - 4 4" 0 LARGER THAN 4 INCH- - - - - 4 d 0HOSE BIBB1 2.5 2.5 - 2.5 2.5 1/2" - - EACH ADDITIONAL HOSE BIBB (8)1 1 1 - - 1 1 1/2" - - CLINICAL SINK 2.25 0 2.25 0 3 01/2" FAUCET / 1" FLUSHOMETER VALVE6 3" 0 EXAM SINK0.75 0 0.75 0 1 0 1/2" 1 0 SITZ BATH1.125 0 1.125 0 1.5 0 2 0LAVATORY, SINGLE TRAP2 0.75 1.5 0.75 1.5 1 2 1/2" 1 1 1/4" 2 LAVATORY, COMBINATION PER TRAP- - - - - 2 1 1/2" 0 PRIVATE - BAR0.75 0 0.75 0 1 0 1/2" 1 1 1/2" 0 PUBLIC - BAR1.5 0 1.5 0 2 0 1/2" 2 1 1/2" 0 KITCHEN1.125 0 1.125 0 1.5 0 1/2" 2 1 1/2" 0 LAUNDRY1.125 0 1.125 0 1.5 0 1/2" 2 1 1/2" 0 PRIVATE - SERVICE / MOP1.125 0 1.125 0 1.5 0 1/2" 3 2" 0 PUBLIC - SERVICE / MOP, 2" OUTLET2.25 0 2.25 0 3 0 1/2" 3 2" 0 PUBLIC - SERVICE / MOP, 3" OUTLET1 2.25 2.25 2.25 2.25 3 3 1/2" 3 3" 3 PUBLIC - SERVICE / MOP, FLUSHING RIM2.25 0 2.25 0 3 0 1/2" 6 3" 0 WATER CLOSET PRIVATE - 1.6 GPF FLUSH TANK2.5 0 - - 2.5 0 1/2" 3 3" 0 PUBLIC - 1.6 GPF FLUSH TANK3 2.5 7.5 - - 2.5 7.5 1/2" 4 3" 12 PRIVATE - 1.6 GPF FLUSH VALVE (7)0 0- - 0 0 1" 3 3" 0 PUBLIC - 1.6 GPF FLUSH VALVE (7)0 0- - 0 0 1" 6 3" 015.25 3.75 16.5 Total DWV FU = 17.53" Sanitary Service12 4 12.5TOTAL SUPPLY SYSTEM(S) FLOW (GPM)TOTAL FIXTURES (FU)FIXTURE TYPE (2)QUANTITYMINIMUM FIXTURE BRANCH PIPE SIZE (1), (4) HEALTH CARE FIXTURES SINKCOLD WATER HOT WATER TOTAL WATER (3)SANITARY WASTE
MILL BUILDING RENOVATION
Project # 06020.12 APPENDIX C HYDRANT TEST DATA
CITY OF BOZEMAN
Fire Flow Request Form
PHONE (406) 582-3200 FAX (406) 582-3201
Date September 27, 2024
Location Mill Work (E Cottonwood St)
Pressure Zone South
GIS Hydrant ID# 964, 2837
Adjacent Main Size 6-inch CI, 10-inch DI
Model Scenario Maximum Day Demand, Steady State, Fire Flow
Reference 2017 Water Facility Plan Update1
Hydrant Curves An Excel Spreadsheet with hydrant curves has been provided for the
requested location
Requested Location via the Bozeman Infrastructure Viewer2
If you have questions or need further information feel free to email.
Data Disclaimer: Water distribution information is calculated using hydraulic modeling software and is subject to
variation. Actual field conditions may vary. This information is provided to the requestor for evaluation purposes
only, without warranty of any kind, including, but not limited to any expressed or implied warranty arising by
contract, stature, or law. In no event regardless of cause, shall the City be liable for any direct, indirect, special,
punitive or consequential damages of any kind whether such damages arise under contract, tort, strict liability or
inequity.
HOME OF MONTANA STATE UNIVERSITY
GATEWAY TO YELLOWSTONE PARK
1 https://www.bozeman.net/home/showpublisheddocument/4977/636420174896170000
2 https://gisweb.bozeman.net/Html5Viewer/?viewer=infrastructure
GIS Hydrant #
Available Flow
(gpm)
Residual
Pressure (psi)
964
0 143.56
200 142.98
400 142.02
600 140.68
800 138.99
1,000.00 136.94
1,200.00 134.54
1,400.00 131.81
1,600.00 128.77
1,800.00 125.41
2,000.00 121.74
2,200.00 117.77
2,400.00 113.51
2,600.00 108.96
2,800.00 104.11
3,000.00 98.99
3,200.00 93.57
3,400.00 87.88
3,600.00 81.9
3,800.00 75.65
4,000.00 69.12
4,200.00 62.31
4,400.00 55.22
4,600.00 47.87
4,800.00 40.24
5,000.00 32.29
5,200.00 24.06
5,400.00 15.56
5,600.00 6.8
Hydrant Curve
0
20
40
60
80
100
120
140
160
0 1000 2000 3000 4000 5000 6000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
964
Data Disclaimer: Water distribution information is calculated using hydraulic
modeling software and is subject to variation. Actual field conditions may vary. This
information is provided to the requestor for evaluation purposes only, without
warranty of any kind, including, but not limited to any expressed or implied
warranty arising by contract, stature, or law. In no event regardless of cause, shall
the City be liable for any direct, indirect, special, punitive or consequential damages
of any kind whether such damages arise under contract, tort, strict liability or
inequity.
GIS Hydrant #
Available Flow
(gpm)
Residual
Pressure (psi)
2837
0 143.28
200 142.93
400 142.56
600 142.13
800 141.63
1,000.00 141.07
1,200.00 140.45
1,400.00 139.77
1,600.00 139.02
1,800.00 138.23
2,000.00 137.38
2,200.00 136.48
2,400.00 135.54
2,600.00 134.54
2,800.00 133.5
3,000.00 132.42
3,200.00 131.28
3,400.00 130.09
3,600.00 128.86
3,800.00 127.58
4,000.00 126.24
4,200.00 124.86
4,400.00 123.43
4,600.00 121.95
4,800.00 120.41
5,000.00 118.78
5,200.00 117.09
5,400.00 115.33
5,600.00 113.55
5,800.00 111.69
6,000.00 109.79
6,200.00 107.83
6,400.00 105.82
6,600.00 103.76
6,800.00 101.66
7,000.00 99.5
7,200.00 97.29
7,400.00 95.02
7,600.00 92.72
7,800.00 90.36
8,000.00 87.95
8,200.00 85.49
8,400.00 82.98
Hydrant Curve
0
20
40
60
80
100
120
140
160
0 5000 10000 15000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
2837
Data Disclaimer: Water distribution information is
calculated using hydraulic modeling software and is
subject to variation. Actual field conditions may vary. This
information is provided to the requestor for evaluation
purposes only, without warranty of any kind, including,
but not limited to any expressed or implied warranty
arising by contract, stature, or law. In no event regardless
of cause, shall the City be liable for any direct, indirect,
special, punitive or consequential damages of any kind
whether such damages arise under contract, tort, strict
liability or inequity.
8,600.00 80.41
8,800.00 77.8
9,000.00 75.15
9,200.00 72.45
9,400.00 69.63
9,600.00 66.89
9,800.00 64.05
10,000.00 61.15
10,200.00 58.19
10,400.00 55.21
10,600.00 52.17
10,800.00 49.04
11,000.00 45.87
11,200.00 43.15
11,400.00 40.37
11,600.00 37.56
11,800.00 34.73
12,000.00 31.87
12,200.00 28.99
12,400.00 26.07
12,600.00 22.77
12,800.00 19.36
13,000.00 15.9
13,200.00 12.4
13,400.00 8.85
13,600.00 5.26
13,800.00 1.62
13,888.57 0
