HomeMy WebLinkAbout15 - Design Report - Cannery District PUD - Water Water Main Extension Engineer's Report
Cannery District PUD
February, 2015
For Submittal to:
City of Bozeman Engineering Department
20 East Olive
Bozeman, MT 59715
Montana Department of Environmental Quality
Permitting and Compliance Division
Public Water and Subdivisions Bureau
PO Box 200901
Helena, MT 59620-0901
Prepared by:
Stahly Engineering and Associates
851 Bridger Drive, Suite 1
Bozeman, MT 59715
(406) 522-9526
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Engineer's Report
Contents
Note: The Engineer's Report format for the Cannery District PUD Water Main
Extension follows DEQ-1 organization. Additional information required by the
City of Bozeman Design Standards is added where required.
Report Narrative
1.1.1 General information
1.1.2 Extent of water works system
1.1.3 Alternate plans
1.1.4 Site conditions
1.1.5 Water use data
1.1.6 Flow requirements
1.1.7 Sewage system available
1.1.8 Sources of water supply
1.1.9 Proposed treatment processes
1.1.10 Waste disposal
1.1.11 Automation
1.1.12 Project Sites
1.1.13 Financing
1.1.14 Future Extensions
Figures and Tables
Figure 1. Vicinity Map
Figure 2. Water Site Plan (C2.0 - included separately)
Table 1. Estimated Water Use
Appendices
A WaterCAD Hydraulic Analysis
Water Mains 1 2/5/2015
1.1.1 General Information
The Cannery District is a multi-phase development located on the north
side of East Oak Street and Rouse Avenue, north of the Gallatin County
Fairgrounds. The existing property consists of several parcels of land
within the City and County, with 3.30 acres within the City and 8.94 acres
in the county.
The development consists of four phases. The first phase, which was
approved by the City of Bozeman and MDEQ in November of 2014,
consists of remodeling four existing buildings originally constructed as part
of the original pea canning operation in 1917. Though not required by the
redevelopment of the existing buildings, the existing water and sewer
infrastructure will be replaced and upgraded to current City standards,
prior to the construction of proposed Phase 1 site improvements. A
deferred annexation has been approved by the City of Bozeman for the
eventual annexation of Phase 1.
Phases 2, 3 and 4 involve the construction of six new buildings on the
Cannery District property. Water demands from these future phases were
accounted for in the design of the approved Phase 1 system. These
future phases will be annexed prior to development, in order to receive
municipal services for new buildings.
The developer's contact information is:
Cannery District Partners, LLC
1006 W Main Street
Bozeman, MT 59715
Water supply and wastewater treatment will be provided by the City of
Bozeman's municipal systems. The system owner's contact information
is:
City of Bozeman Public Service Department
PO Box 1230
Bozeman, MT 59771-1230
The location of the Cannery District is shown on the Vicinity Map in Figure
1. See C2.0 for Phase 1 through 4 improvements.
Water Mains 2 2/5/2015
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Figure 1. Vicinity Map, Bozeman, Montana �L
1.1.2 Extent of Water Works System
Water supply to the area is from a 12" water main in Oak Street and
Montana Avenue. The water main predates the current Oak Street
alignment and follows older rights-of-way. As part of the overall
development plan this water main will remain, and the existing on-site
rights-of-ways will be replaced with 30' water and sewer easements. The
location of existing and proposed mains is shown on the Water System
Site Plan, C2.0, included separately.
The existing water system consists of a loop around the existing buildings
constructed in 1917 to supply several fire sprinkler risers on the site. This
system was originally supplied from Rouse Avenue, and included the
landmark elevated storage tank. With improved City supply, the tank was
no longer required, and has been removed from the system. With the
development of the Northside PUD the original supply line from Rouse
was replaced with a new 8" fire service and single 2" water service from
the 12" main on-site. The 8" fire service is connected to the original loop
around the buildings which is currently only used for fire protection water
supply. The 2" water service is metered in a vault at the connection to the
main and then splits to provide service to each building.
The approved Phase 1 improvements include new 8" water mains that will
replace the existing, old water mains on-site. The new mains will
essentially follow the same route as the existing loop around the buildings.
However, the new mains allow installation of new on-site fire hydrants,
and new individual fire and water services to each building. The new
water services are proposed to be metered in the buildings. The new 8"
Water Mains 3 2/5/2015
water main loop allows for future extensions or services to serve future
phases. Stubs for future water main extensions or services will be
extended beneath Phase 1 site improvements. Future main extensions
are shown on the Water System Site Plan.
1.1.3 Alternate Plans
Due to the project's location within the City of Bozeman, extension of
public mains was the only water supply alternative.
1.1.4. Site Conditions
The site is typical of Bozeman with fine grained soils overlying gravel
deposits. Geotechnical borings have determined the general soil profile
consists of 1.5 to 7.0 feet of fine grain silt and clay overlying alluvial
gravel. Estimated depth to groundwater obtained from the geotechnical
borings is 6.5 -11 feet. If mains are installed during high groundwater
times dewatering may be required.
1.1.5. Water Use Data
The water use estimate for the Cannery District was determined using
wastewater flow rates for zoned undeveloped areas from the City of
Bozeman Design Standards and Specifications Policy, Table V-1. For the
Northside PUD and the portion of the Cannery District that is currently
within city limits, the zoning designation is B-2. The rest of the Cannery
district currently outside of city limits must be annexed prior to
development, with the plan being to maintain the same zoning designation
of B-2. Table V-1 shows a flow rate of 2000 Gal./Acre/Day for zoning
designation B-2. This water use estimate using this flow rate is shown in
Table 1 as the design rate.
In order to determine average annual water use, 3 years of water meter
readings from the adjacent and very similar Northside PUD were
analyzed. This analysis showed an average annual water use rate of
1059 gpd/acre, which is applied to the Cannery District to determine its
estimated average annual water use.
Water Mains 4 2/5/2015
Table 1 Estimated Water Use - Cannery District PUD
Total All
Cannery District Water Use Phase 1 Phase 2 Phase 3 Phase 4 Phases
Acreage(acres) 3.761 3.29 3.237 1.946 12.234
Design Water Use Rate(gpd/acre) 2000 2000 2000 2000 2000
Design Daily Water Use (gpd) 7522 6580 6474 3892 24468
Design Peaking Factor(Ave Day to Peak Hour) 10 10 10 10 10
Design Peak Hour Flow(gpm) 52 46 45 27 170
Annual Average Water Use Rate(gpd/acre) 1059 1059 1059 1059 1059
Annual Average Daily Water Use(gpd) 3982 3484 3428 2061 12954
Annual Average Water Use (acre feet) 4.46 3.90 3.84 2.31 14.51
All existing and proposed buildings will have fire sprinklers. With this
provision and the size of the buildings, required fire flows will likely be
1500 gpm.
Existing irrigation to Phase 1 is provided by a well. It is envisioned that
future irrigation to Phases 2-4 will continue to be handled in the same
manner. The estimated total area of landscape irrigation is approximately
1.5 acres, within the exempt well water right limits.
1.1.6. Flow Requirements
A hydraulic analysis was performed using WaterCAD. The WaterCAD
model incorporates the 12" diameter city water main as the primary
supply. Operating conditions and available fire flow in these mains was
obtained from the WaterCAD model results provided in the City of
Bozeman Water Facility Plan and hydrant flow data performed at a
hydrant directly south of Phase 1 Cannery District. The fire flow analysis
was conducted at the maximum day demand.
The model is setup with existing and new pipes. Phase 1 pipes and
junctions begin with numbers >100 (the Phase 2 pipe is labeled 201, and
Phase 3 pipe numbers are labeled >300). Junction elevations are based
on the project datum, approximately 15' above the City of Bozeman
datum. In order to determine fire flows at hydrants, hydrant lead pipes are
provided to junctions representing hydrants. Hydrant lead pipes have
minor losses corresponding to hydrant barrel and nozzle losses. Fire
flows are determined at hydrant residual pressures of 20 psi. Fire flows
determined at non-hydrant junctions are of little practical value since
without hydrant losses computed fire flows are artificially high.
Water Mains 5 2/5/2015
A Hydrant flow test was conducted at the hydrant south of Phase 1. The
city water supply was modeled as a reservoir-pump system calibrated to
the hydrant test. The pump curve provides decreasing pressures with
increasing flows corresponding to head losses in the distribution system
outside of the model. The model results with only existing pipes utilized
correspond well with the flows and residual pressures measured during
the hydrant test.
The WaterCAD model results are included in Appendix A of this report.
Due to the high pressure in the water system at this location, available fire
flow is not limited by residual pressure. The maximum permissible
velocity of 15 fps in the 8" ductile iron water mains limits the fire flow
available to 2530 gpm, which exceeds the required fire flow. The model
shows the proposed water main improvements are capable of providing
the required fire flow plus maximum day demand for the project.
The proposed layout of the water system has each building with its own
water and fire service, as shown in C2.0. Final determination of water
service sizes will be based on fixture counts for each building.
1.1.7. Sewage System Available
Sewer service is provided by city mains that will be replaced as part of the
approved Phase 1 improvements. Where water mains cross sewer mains,
18" of vertical separation is provided.
1.1.8. Sources of Water Supply
This section is not applicable.
1.1.9 Proposed Treatment Process
This section is not applicable.
1.1.10 Waste Disposal
This section is not applicable.
1.1.11 Automation
This section is not applicable.
1.1.12 Project Sites
Water Mains 6 2/5/2015
This section is not applicable.
1.1.13 Financing
This section is not applicable.
1.1.14 Future Extensions
The replacement of the water main loop that will be constructed during the
approved Phase 1 improvements will allow future extensions and services
to serve future phases. Stubs for future water main extensions or services
will be extended beneath Phase 1 site improvements. Future main
extensions are shown on the Water System Site Plan.
During Phase 2 (Buildings J and K) the existing 12" main will be
connected to the existing 8" main in Northside PUD. Additionally, new
services and a hydrant will be installed on the existing 12" main.
Phase 3 (Buildings L and M) will require a future main extension of the 8"
water main as depicted by the dashed blue line in C2.0. A stub for this
extension is provided with the Phase 1 water mains.
Phase 4 (Buildings N and O) will utilize services from water mains
installed in Phase 1.
Water Mains 7 2/5/2015
Figure 2
Water Site Plan
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PRINT AREA I I NORT I E PUD i } U O
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PHASE 1 (SF) (SF) ; = (EXING) I _
BLDG E 9,231 4 29,698 RETAIL,RE T URANT,OFFICE
BLDG F 12.000 1&2 16,500 RETAIL,BR ERY,OFFICE
BLDG G 13,760 1&2 18,500 OFFICE !;1.1: BLDG C
BLDG H 1,600 1 1,600 OFFICE a L
PHASE 2 I '� V a a
BLDG J 11,90 1+M ZZ 13,400 HEALTH& _X_RCISE
BLDG K 8,000 1+M ZZ 10,720 RETAIL
PHASE 3
BLDG L 12,70 2 26,500 OFFICE
B �
BLDG M 8,700 2 16,000 OFFICE I '
PHASE 4 ( BLDG A I WATER SITE PLAN
BLDG N 5,800 2 10,000
BLDG O _ 9,100_ 2 _ 18,000 _ OFFICE
TOTAL 92,791 160,918 C 2.0
Appendix A
WaterCAD Modeling
HJ-108 J-107
P-108
0 27 gpm Architecture,Inc.
CDi Phase 4
J-104 P-104
HJ-109
a J-103 6"Water Main
52 gpm
8"Water Main
CDi Phase 1 o D 25 50 tDO
i J-102 _
HJ-302 10"Water Main IN r>rT
a 01 J-301
12"Water Main Thbd-Ingl,nd W.,Nd reWhte
—d for cmvmdlon pup—ui,,,t.
signed prola,rio 1,lanpdarey9aed
P-110 45 J-105 gpm P-22 Pipe Labels A`rNI.t a"a�.j�
HJ-110 CDi Phase 3 J-6 Junction Labels �6
XXXX Maximum Day Demands and Text IfA���
STAH LY
Demand Summary
46 m Area Max Day fofiHT�$
gpm Northside PUD 42 m look
CDi Phase 2 gp
CDi Phase 1 52 gpm DESIGNS
/J- ot CDi Phase 2 46 gpm ❑nrJscape archileclui
04 I
J-100 CDi Phase 3 45 gpm
Existing Hydrant Tested J-111 CDi Phase 4 27 gpm Linda Iverson
Residual Measured in Bldg Total 212 gpm landscape design
156 psi static
1100 gpm at 152 psi res. HJ-9
4990 gpm at 145 psi res.
AT
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main in Oak Street.
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153 psi at 1100 gpm w
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152 psi at 4990 gpm ° E go =
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FlexTable: Junction Table
Current Time: 0.000 hours
Label Elevation Demand Hydraulic Grade Pressure
(ft) (gpm) (ft) (psi)
HJ-9 4,752.00 (N/A) (N/A) (N/A)
HJ-108 4,748.00 0 5,111.45 157
HJ-109 4,750.00 0 5,111.46 156
HI-110 4,751.00 0 5,111.46 156
HJ-111 4,750.00 0 5,111.50 156
HJ-302 4,751.00 0 5,111.45 156
J-1 4,756.00 0 5,111.59 154
J-2 4,756.00 0 5,111.59 154
J-3 4,756.00 0 5,111.58 154
J-4 4,755.00 0 5,111.57 154
J-5 4,754.00 0 5,111.57 155
J-6 4,752.00 0 5,111.57 156
J-7 4,752.00 0 5,111.57 156
3-8 4,752.00 (N/A) (N/A) (N/A)
1-10 4,755.00 0 5,111.58 154
3-11 4,755.00 42 5,111.57 154
J-12 4,756.00 0 5,111.59 154
J-100 4,750.00 0 5,111.50 156
3-101 4,750.00 46 5,111.49 156
3-102 4,750.00 0 5,111.46 156
1-103 4,750.00 0 5,111.46 156
3-104 4,749.00 52 5,111.45 157
1-105 4,751.00 0 5,111.46 156
3-107 4,748.00 27 5,111.45 157
1-301 1 4,751.00 451 5,111.451 156
Bentley Systems,Inc. Haestad Methods Solution Bentley WaterCAD V8i(SELECTseries 4)
CDi WATERCAD.wtg Center [08.11.04.50)
11/12/2014 27 Siemon Company Drive Suite 200 W Page 1 of 1
Watertown,CT 06795 USA +1-203-755-1666
Fire Flow Node FlexTable: Fire Flow Report
Current Time: 0.000 hours
Label Fire Flow Pressure Junction w/ Pressure Junction w/
(Available) (Calculated Minimum (Calculated Minimum
(gpm) Residual) Pressure(Zone) System Lower Pressure
(psi) Limit) (System)
(psi)
HI-9 (N/A) (N/A) (N/A) (N/A) (N/A)
HI-108 5,000 35 3-107 93 J-107
HI-109 5,000 56 3-103 114 3-103
HI-110 5,000 50 3-105 108 3-105
HJ-111 5,000 71 HJ-302 135 HJ-302
HJ-302 5,000 21 3-301 78 J-301
J-1 5,000 152 J-3 152 J-3
J-2 5,000 152 J-3 152 J-3
J-3 5,000 149 J-4 151 3-4
3-4 5,000 150 3-11 150 3-11
J-5 5,000 150 3-4 150 3-4
3-6 5,000 151 3-4 150 J-4
J-7 5,000 151 J-4 151 3-4
3-8 (N/A) (N/A) (N/A) (N/A) (N/A)
3-10 5,000 146 3-11 151 3-11
J-11 5,000 147 3-4 150 3-4
3-12 5,000 152 3-3 152 3-3
J-100 5,000 135 HJ-302 135 HJ-302
3-101 5,000 131 1-13-302 131 HJ-302
J-102 5,000 117 HI-302 116 HI-302
J-103 5,000 114 HI-109 114 HJ-109
3-104 5,000 108 3-107 109 1-107
3-105 5,000 108 HI-110 108 HI-110
3-107 5,000 93 HI-108 93 HJ-108
3-301 1 5,000 78 1 HI-302 1 781 HI-302
Bentley Systems,Inc. Haestad Methods Solution Bentley WaterCAD V8i(SELECTseries 4)
CDi WATERCAD.wtg Center [08.11.04.50]
11/12/2014 27 Siemon Company Drive Suite 200 W Page 1 of 1
Watertown,CT 06795 USA +1-203-755-1666