HomeMy WebLinkAbout13_Cannery District Water Engineers Report_3-31-2020Water Main Extension Engineer’s Report
Cannery District PUD
Building J Update
March 2020
For Submittal to:
City of Bozeman Engineering Department
20 East Olive
Bozeman, MT 59715
Prepared by:
Stahly Engineering and Associates
851 Bridger Drive, Suite 1
Bozeman, MT 59715
(406) 522-9526
Water Engineer’s Report 1 3/27/2020
Engineer’s Water Report
Contents
Note: The Engineer’s Report format for the Cannery District’s Water Mains
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 (included separately)
Table 1. Estimated Water Use
Appendices
A. i. WaterCAD Hydraulic Analysis
ii. Water Fixture Count Work Sheet
Water Engineer’s Report 2 3/27/2020
1.1.1 General Information
The Cannery District is a multi-phase development located in the City of
Bozeman on the north side of East Oak Street and Rouse Avenue, north
of the Gallatin County Fairgrounds. The existing property consisted of
several parcels of land totaling approximately 12.22 acres.
The development consists of four phases. The first phase, which was
completed in 2016, consisted of remodeling four existing buildings
originally constructed as part of the original pea canning operation in
1917. Phases 2, 3 and 4 involve the construction of six new buildings on
the Cannery District property. Phases 2 and 4 improvements were
completed in 2018, Phase 3 improvements are currently under
construction and are anticipated to be completed in the summer of 2020.
The final site building, Building J, will begin construction in the fall of 2020
after plan approval from the City. In addition to Building J, the Northwest
Parking Lot will be constructed as a site plan modification to Building O.
Construction of the Northwest Parking Lot is planned to happen in the
summer of 2020.
This report addresses the water improvements associated with the final
building construction of the Cannery District PUD (Building J) and
compares the originally estimated water demands with demands based on
actual uses of the built-out development. Water demands from these
future phases were accounted for in the design of the previously
constructed phases.
The developer’s contact information is:
Cannery District Partners, LLC
113 East Oak Street, Ste 4A
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 Figure 2 for Phase 1 through 4 improvements.
Water Engineer’s Report 3 3/27/2020
Figure 1. Vicinity Map, Bozeman, Montana
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 have been replaced with 30’ water and sewer easements.
The location of existing and proposed mains is shown on the Water Site
Plan, Figure 2, included separately.
The previously constructed Phase 1, 2 and 4 improvements include new
8” water mains that replaced the old water mains on-site. The new mains
essentially follow the same route as the old water main loop around the
buildings. However, the new mains have allowed installation of new on-
site fire hydrants, and new individual fire and water services to each
building. The new water services are metered in the buildings. The new 8”
water main loop allowed for extensions and services to serve the
additional phases. Stubs for water main extensions and services were
extended beneath Phase 1 site improvements.
Phase 2 water main improvements consisted of installing new water
services to two buildings from the existing mains, relocating a fire hydrant,
adding an additional fire hydrant, and connecting existing water mains on
the east end of the site.
Water Engineer’s Report 4 3/27/2020
Phase 3 water main improvements consisted of extending the existing,
previously constructed, water main to provide service for Building L and
Building M and adding a fire hydrant.
The Building J improvements are shown on the Water Site Plan and will
service the new 13,602 sf building which are designated as office and
retail spaces. It is anticipated the Building ‘J’ will be serviced by a 1”
domestic service line and a 4” fire line.
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 water lines are installed during high groundwater
times dewatering may be required.
1.1.5. Water Use Data
The water use estimates for the Cannery District were originally
determined using wastewater flow rates for zoned undeveloped areas
from the City of Bozeman Design Standards and Specifications Policy,
Table V-1. Table V-1 shows a flow rate of 2000 Gal./Acre/Day for zoning
designation B-2. This water use estimate was used to set demands for the
initial hydraulic modeling of the Cannery District development and resulted
in an average daily water use rate of 24,468 gpd and a peak hour flow of
170 gpm.
Since the Cannery District is largely built out, and the specific uses of the
proposed Building J is known, water usage for this building and the entire
development was determined using the following values for average water
use rates:
Office/Retail 10,000 gal/yr/1000sf
Restaurant 165,000 gal/yr/1000sf
Residential 89 gal/day/person
Updated calculations, based on actual building area uses, estimate an
average daily water use rate of 20,622 gpd--which is under the originally-
Water Engineer’s Report 5 3/27/2020
estimated 24,468 gpd—and a peak hour flow of 143.5 gpm, which is under
the originally-estimated 170 gpm. See summary of calculations in Table 1.
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 Phases 1-4 is provided by wells. The estimated total
area of landscape irrigation is approximately 3.43 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 were
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.
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
Water Engineer’s Report 6 3/27/2020
existing water mains can provide the required fire flow plus maximum day
demand for the project.
The layout of the water system has each building with its own water and
fire service, as shown in Figure 2. 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 mains that were installed as part of the
previously constructed Phase 2 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
This section is not applicable.
1.1.13 Financing
This section is not applicable.
1.1.14 Future Extensions
When the Phase 3 mains are fully constructed, that will conclude the
proposed water main infrastructure for the Cannery District with its current
size of 12.2 acres. Provisions have been made for mains to be extended
outside of the development’s current boundary if, and when, needed.
Figure 2
Water Site Plan
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BUILDING JCANNERY DISTRICT PH 2211 EAST OAK STREET
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TABLE 1: Detailed Cannery District Water Usage 5/15/2020
Cannery District Phase 1 Area **Peak Hr Flow
Use by Building (gsf)gpd/1000 sf GPD (ac-ft/yr)(gpm)
Cannery Building (Bldg E)
Office/Retail 16,897 30 507 0.57 3.5
Restaurant/Bar 7,663 500 3,832 4.29 26.6
Building Common Area 3,773 30 113 0.13 0.8
Subtotal 28,333 4,452 4.99 30.9
Cannery Complex (Bldg F)
Office/Retail 7,621 30 229 0.26 1.6
Restaurant/Bar 7,505 500 3,753 4.20 26.1
Building Common Area 625 30 19 0.02 0.1
Subtotal 15,751 4,000 4.48 27.8
Canning Warehouse (Bldg G)
Office/Retail 14,041 30 421 0.47 2.9
Restaurant/Bar 1,365 500 683 0.76 4.7
Building Common Area 3,066 30 92 0.10 0.6
Subtotal 18,472 1,196 1.34 8.3
Boiler House (Bldg H)
Office 2,100 30 63 0.07 0.44
Total of Phase 1 9,710 10.88 67.43
Cannery District Phase 2 Area **Peak Hr Flow
Use by Building (gsf)gpd/1000 sf GPD (ac-ft/yr)(gpm)
Building J
Office 13,602 30 408 0.46 2.8
Subtotal 13,602 408 0.46 2.8
Building K
Office 3,245 30 97 0.11 0.7
Gym 4,607 100 461 0.52 3.2
Building Common Area 3,391 30 102 0.11 0.7
Subtotal 11,243 660 0.74 4.6
Total of Phase 2 1,068 1.20 7.4
Cannery District Phase 4 Area **Peak Hr Flow
Use by Building (gsf)gpd/1000 sf GPD (ac-ft/yr)(gpm)
Bldg N
Office/Retail 8,712 30 261 0.29 1.8
Building Common Area 1,584 30 48 0.05 0.3
Subtotal 10,296 309 0.35 2.1
Bldg O
Office/Retail 14,378 30 431 0.48 3.0
Restaurant/Bar 1,642 500 821 0.92 5.7
Building Common Area 2,504 30 75 0.08 0.5
Subtotal 18,524 1,327 1.49 9.2
Total of Phase 4 1,636 1.83 11.4
Cannery District Phase 3 Area **Peak Hr Flow
Use by Building (gsf)gpd/1000 sf GPD (ac-ft/yr)(gpm)
Bldg L
Office/Retail 14,926 30 448 0.50 3.1
*Residential 7,142 8.00 49.6
Subtotal 7,590 8.50 52.7
Bldg M
Office 21934 30 658 0.74 4.6
Total of Phase 3 8,248 9.24 57.3
TOTAL ALL PHASES 20,662 23.14 143.5
*Residential Use calculated using 89 gal/person/day, 80.25 estimated people
**Peaking Factor used for Avg Day to Peak Hour 10
Average Water Use
Average Water Use
Average Water Use
Average Water Use
Appendix A
WaterCAD Modeling
FlexTable: Pipe Table
Current Time: 0.000 hours
Length (User
Defined)
(ft)
Velocity
(ft/s)
Flow
(gpm)
Minor Loss
Coefficient
(Local)
Hazen-Williams
C
Diameter
(in)
Stop NodeStart NodeLength
(Scaled)
(ft)
Label
10.56-2120.000130.012.4R-1PMP-114P-0
10.56-2120.000130.012.4PMP-1J-116P-1
10.291090.000130.012.4J-2J-1642P-2
00.20740.000130.012.4J-3J-2351P-3
00.20740.000130.012.4J-4J-3311P-4
00.18670.000130.012.4J-5J-425P-5
00.18670.000130.012.4J-6J-5191P-6
00.27-1030.000130.012.4J-7J-698P-7
0(N/A)(N/A)0.000130.08.3J-8J-741P-8
0(N/A)(N/A)2.700130.06.2HJ-9J-84P-9
00.13340.000130.010.3J-10J-2270P-10
00.20340.000130.08.3J-11J-10304P-11
00.27-1030.000130.012.4J-12J-7361P-12
10.27-1030.000130.012.4J-1J-12523P-13
01.011700.000130.08.3J-100J-6120P-100
01.011700.000130.08.3J-101J-10027P-101
00.44750.000130.08.3J-102J-101202P-102
00.18300.000130.08.3J-103J-10265P-103
00.18300.000130.08.3J-104J-103361P-104
00.29-490.000130.08.3J-105J-104123P-105
00.29-490.000130.08.3J-101J-105493P-106
00.16270.000130.08.3J-107J-104124P-107
00.0002.700130.06.2HJ-108J-10711P-108
00.0002.700130.06.2HJ-109J-10313P-109
00.0002.700130.06.2HJ-110J-10514P-110
00.0002.700130.06.2HJ-111J-10024P-111
00.05-80.000130.08.3J-4J-1148P-201
00.27450.000130.08.3J-301J-102289P-301
00.0002.700130.06.2HJ-302J-30111P-302
Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA
+1-203-755-1666
11/12/2014
Bentley WaterCAD V8i (SELECTseries 4)
[08.11.04.50]Bentley Systems, Inc. Haestad Methods Solution CenterCDi WATERCAD.wtg
FlexTable: Junction Table
Current Time: 0.000 hours
Pressure
(psi)
Hydraulic Grade
(ft)
Demand
(gpm)
Elevation
(ft)
Label
(N/A)(N/A)(N/A)4,752.00HJ-9
1575,111.4504,748.00HJ-108
1565,111.4604,750.00HJ-109
1565,111.4604,751.00HJ-110
1565,111.5004,750.00HJ-111
1565,111.4504,751.00HJ-302
1545,111.5904,756.00J-1
1545,111.5904,756.00J-2
1545,111.5804,756.00J-3
1545,111.5704,755.00J-4
1555,111.5704,754.00J-5
1565,111.5704,752.00J-6
1565,111.5704,752.00J-7
(N/A)(N/A)(N/A)4,752.00J-8
1545,111.5804,755.00J-10
1545,111.57424,755.00J-11
1545,111.5904,756.00J-12
1565,111.5004,750.00J-100
1565,111.49464,750.00J-101
1565,111.4604,750.00J-102
1565,111.4604,750.00J-103
1575,111.45524,749.00J-104
1565,111.4604,751.00J-105
1575,111.45274,748.00J-107
1565,111.45454,751.00J-301
Page 1 of 127 Siemon Company Drive Suite 200 W
Watertown, CT 06795 USA +1-203-755-1666
11/12/2014
Bentley WaterCAD V8i (SELECTseries 4)
[08.11.04.50]
Bentley Systems, Inc. Haestad Methods Solution
CenterCDi WATERCAD.wtg
Fire Flow Node FlexTable: Fire Flow Report
Current Time: 0.000 hours
Junction w/
Minimum
Pressure
(System)
Pressure
(Calculated
System Lower
Limit)
(psi)
Junction w/
Minimum
Pressure (Zone)
Pressure
(Calculated
Residual)
(psi)
Fire Flow
(Available)
(gpm)
Label
(N/A)(N/A)(N/A)(N/A)(N/A)HJ-9
J-10793J-107355,000HJ-108
J-103114J-103565,000HJ-109
J-105108J-105505,000HJ-110
HJ-302135HJ-302715,000HJ-111
J-30178J-301215,000HJ-302
J-3152J-31525,000J-1
J-3152J-31525,000J-2
J-4151J-41495,000J-3
J-11150J-111505,000J-4
J-4150J-41505,000J-5
J-4150J-41515,000J-6
J-4151J-41515,000J-7
(N/A)(N/A)(N/A)(N/A)(N/A)J-8
J-11151J-111465,000J-10
J-4150J-41475,000J-11
J-3152J-31525,000J-12
HJ-302135HJ-3021355,000J-100
HJ-302131HJ-3021315,000J-101
HJ-302116HJ-3021175,000J-102
HJ-109114HJ-1091145,000J-103
J-107109J-1071085,000J-104
HJ-110108HJ-1101085,000J-105
HJ-10893HJ-108935,000J-107
HJ-30278HJ-302785,000J-301
Page 1 of 127 Siemon Company Drive Suite 200 W
Watertown, CT 06795 USA +1-203-755-1666
11/12/2014
Bentley WaterCAD V8i (SELECTseries 4)
[08.11.04.50]
Bentley Systems, Inc. Haestad Methods Solution
CenterCDi WATERCAD.wtg
Commercial (2012 IBC)
City of Bozeman Water Service Calculation Worksheet
Project Address: ___________________________________ Property Owner: ______________________________
General Contractor: _______________________________________________________________________________
Permit Number: _______________ Proposed Water Meter Size: _______________
Standard Design Water Supply Fixture Units
Appliances and Fixtures Fixture Units # of Fixtures Total
Bathtub/Combination Tub/Shower 4.0 X ________ = ________
Soaker Tub 10.0 X ________ = ________
Shower (per head) 2.0 X ________ = ________
Clothes washer 4.0 X ________ = ________
Dishwasher 1.5 X ________ = ________
Hose Bibb 2.5 X ________ = ________
Additional Hose Bibb (each) 1.0 X ________ = ________
Drinking Fountain 0.5 X ________ = ________
Service / Mop Basin 3.0 X ________ = ________
Lavatory Sink 1.0 X ________ = ________
Kitchen Sink 1.5 X ________ = ________
Laundry Sink 1.5 X ________ = ________
Water closet (1.6 GPF) 2.5 X ________ = ________
Water closet (1.6 GPF – Flushometer tank) 2.5 X ________ = ________
Water closet (flushometer valve) Table Values ________ = ________
Urinal (flushometer valve) Table Values ________ = ________
Total Number of Fixture Units ________
Fixture Unit Tables for Determining Water Pipe & Meter Size Pressure Range – Over 60 PSI
Circle the length in feet to the farthest fixture & applicable service, meter & branch sizes below based on
the total number of fixture units detailed above.
Maximum Allowable Length in feet
Meter & Supply & 60’ 80’ 100’ 150’ 200’
Service Branches
¾” ¾” 20 20 19 17 14
¾” 1” 39 39 36 33 28
1” 1” 39 39 39 36 30
¾” 1¼” 39 39 39 39 39
1” 1¼” 78 78 76 67 52
1½” 1¼” 78 78 78 78 66
1” 1½”/2” 85 85 85 85 85
1½” 1½” 151 151 151 151 128
2” 1½” 151 151 151 151 150
1½” 2” 370 370 340 318 272
2” 2” 370 370 370 370 368
If count is over 370 fixtures, water demand does not meet table 6.10.4 and has to be engineered by a
registered Montana mechanical engineers design, signed and stamped.
12.20.17