HomeMy WebLinkAbout016_Bronken Water Report
BRONKEN WAREHOUSE – BOZEMAN
WATER SYSTEM IMPROVEMENTS
WATER MAIN EXTENSION BASIS OF DESIGN REPORT
December 2021
PREPARED BY:
MMI #: 2200.048
2
Table of Contents
1.1.1 General Information .......................................................................................... 3
1.1.2 Extent of Water Works System, including: ......................................................... 3
1.1.3 Alternate Plans .................................................................................................. 4
1.1.4 Site Conditions .................................................................................................. 4
1.1.5 Water Use Data ................................................................................................ 4
1.1.6 Flow requirements ............................................................................................. 7
1.1.7 Sources of Water Supply ................................................................................... 7
1.1.8 Proposed Treatment Processes: ....................................................................... 7
1.1.9 Sewage System Available ................................................................................. 7
1.1.10 Waste Disposal ................................................................................................. 7
1.1.11 Automation……………………………………………………………………………..8
1.1.12 Project Sites……………………………………………………………………………8
1.1.13 Financing……………………………………………………………………………….8
1.1.14 Future Extensions ............................................................................................. 8
APPENDICES
Appendix A Nelson Meadows Water and Wastewater Design Report February 2018
Appendix B Fire Flow Exhibits
Prepared by:
Morrison-Maierle, Inc.
2880 Technology Blvd. W.
Bozeman, Montana 59771
Phone: (406) 587-0721
Fax: (406) 922-6702
Written By: RSN Checked By: CMS
Approved By: MEE
PROJECT NO.: 2200.048
3
1.1 Engineer’s Report
The following Design Report follows the section numbering of Circular DEQ-1 Standards
for Water Works, 2018 Section 1.1, Engineer’s Report.
1.1.1 General Information
a. The Bronken Warehouse is located off Prince Lane on Lot 5A of the Nelson
Meadows Subdivision. This project is located within the City of Bozeman,
Montana. See the vicinity map for location details.
The Bronken Warehouse will be serviced by a 4-inch water service and an 8-inch
fire service which will connect into the existing 16” water main along Prince Lane.
b. The proposed water main infrastructure will be served by the City of Bozeman.
c. Project Developer:
Stella Fria LLC
701 Gold Ave
Bozeman, MT 59715
d. System Owner:
City of Bozeman
PO Box 1230
Bozeman, MT 59715
Public Water System (PWSID# MT0000161)
1.1.2 Extent of Water Works System, including:
a. The proposed water connection will connect to an existing 4” water service stub
that connects to an existing 16” water main that is owned by the City of
Bozeman. The proposed 8-inch fire service connection will tap into the existing
16” water main as well. The water service connection is proposed to serve the
warehouse with domestic water. This property is zoned M-1, (Light
Manufacturing District) per the City of Bozeman’s zoning map.
4
b. There are no special provisions for extending the water works system.
c. The proposed 4-inch water service line will serve the Bronken Warehouse’s
facilities and restrooms. The proposed 8” fire service line will provide fire
protection to the proposed warehouse project.
1.1.3 Alternate Plans
The alignment of the proposed service was chosen to meet the layout of the proposed
warehouse project.
1.1.4 Site Conditions
a. The proposed site has existing grades of less than 3%. The site also has
Blackdog silt loam (USDA Soil Survey).
b. A site specific geotechnical report will be done for the warehouse building
foundation construction.
c. The ground water flows generally from the south to the north based on general
groundwater flow in the valley. The groundwater depth at this site is likely
seasonally varied.
1.1.5 Water Use Data
The water distribution system serving the proposed project will be designed and installed
in accordance with the Montana Department of Environmental Quality (MDEQ) Circular
No. 1; Montana Public Works Standard Specifications (MPWSS); the City of Belgrade
Modifications to MPWSS; and the City of Belgrade Design Standards and Specifications
Policy.
The following section addresses the design capacity and flow requirements discussed in
Section 8 of DEQ - 1.
Domestic water demand for the proposed development will be based on the square
footage, number of employees and irrigation for landscaping for the Bronken
Warehouse. As provided on the U.S. Engergy Information Administration website
(EIA.gov), “2012 Commercial Buildings Energy Consumption Survey: Water
5
Consumption in Large Buildings Summary”, all large buildings used an average of 20
gallons per square foot per year in 2012. EIA also estimates that each worker uses 50.1
gallons on a daily basis. Additionally, irrigation requirements are estimated by the
landscape architect and are shown below.
Irrigation Demands are based on City of Bozeman Water Facility Plan Table 3.2:
Estimate Irrigation Water Use, which utilizes 61 gal/acre/day for the Light Manufacturing
land use.
Peaking factors used for design purposes are 2.3 for the Maximum Day Demand, and
3.0 for the Peak Hour Demand as suggested in the City of Bozeman’s Design Standards
and Specifications Policy March 2004 – Section V. Utility Design Criteria, sub-section A,
Water Distribution Lines Design Criteria, Paragraph 4, page 45.
Based on these criteria the demands predicted for the project are:
Average Day Demand
Warehouse: 84,000 SF x 20gpd / SF = 4,603gpd or 3.20gpm
Per employee: 20 employees x 50.1 gpd / employee = 1,002gpd or 0.70gpm
Irrigation: 61 gal/acre/day (Light Manufacturing) x 5.15 acres = 314.15gpd or
0.22gpm
Average Day Demand (Warehouse + Employee + Irrigation) = 5,919.15gpd or 4.11gpm
Maximum Day Demand
2.3 x Average Day Demand = 2.3 x 5,919.15gpd = 13,614gpd or 9.45gpm
Maximum Hour Demand
3.0 x Average Day Demand = 3.0 x 5,919.15gpd = 17,757.45gpd or 12.33gpm
Predicted Average Daily Flow From Nelson Meadows Subdivision
The Nelson Meadows Subdivision Submittal Water and Wastewater Design Report,
(Morrison Maierle, Inc., February 2018), lists the water demand projections for the 69.47-
acre subdivision, see Table 1 below.
6
Table 1: Water Demand Projections from Yellowstone Airport Plaza Subdivision
Zoning Acreage
Equivalent
Population
(People)
Flow
(gpd/
person)
Average
Day Flow
(gpd)
Maximum
Day Flow
(gpd)1
Maximum
Hour Flow
(gpm)2
M-1 69.47 749 170 127,330 292,859 265
1 Maximum day factor of 2.3:1 (City Design Standards and Specifications Policy, pg 45)
2 Maximum hour factor of 3:1 (City Design Standards and Specifications Policy, pg 45)
The original report provided in Appendix A, uses an average day flow of 127,330 gpd per
69.47 acres. The proposed Bronken Warehouse will be on a 5.15-acre lot. Using these
assumptions, the predicted flows for Lot 5A are as follows:
Predicted Average Daily Flow = (127,330 gpd)/(69.47 acres) x (5.15 acres)
= 9,439gpd or 6.55gpm
Predicted Maximum Day Flow = 9,439gpd (2.3) = 21,710gpd or 15.08gpm
Predicted Maximum Day Flow = 9,439gpd (3.0) = 28,317gpd or 19.66gpm
The proposed flow for the warehouse is lower than the demand predicted by the
original Nelson Meadows Subdivision Water and Wastewater Design Report. For this
reason, the water system at Nelson Meadows will have adequate capacity to handle
the increase in flows.
Fire Flow
The total water demand for the system includes the Maximum Daily Demand and the
maximum required fire flow of 1,500gpm which based on the 68,000 square foot
building of Type V-A Construction. Table B105.1(2) of Appendix B of the International
Fire Code requires 5,500gpm fire flow for a building without sprinklers and allows a
reduction for buildings with fire sprinklers. The reduced flow is 25% of the listed flow
which is 1,375gpm. The minimum flow is 1,000gpm or 1,500gpm dependent on if the
fire sprinkler system is designed to meet NFPA 13 or NFPA 13R requirements. For
this report we have conservatively assumed that 1,500gpm will be required. The
Maximum Daily Demand is calculated by multiplying the Average Daily Demand by a
peaking factor of 2.3 as described above.
Fire Flow Demand
9.45gpm + 1,500 gpm = 1,509.45 gpm
7
1.1.6 Flow requirements
The controlling hydraulic condition for the project is the maximum daily demand plus
fire flow. As presented above, the flow requirement is 1,509.45gpm at a residual
pressure of 20 psi.
The City of Bozeman Fire Hydrant Data was provided on November 18th, 2021 which
modeled the curves for Hydrant #3060. A copy of the hydrant model data is included in
Appendix B. Utilizing the City curve data, the static pressure for the hydrant is
determined by the pressure at 0gpm which has a residual pressure of 52.23 psi. This
model data likely has not incorporated increased flows provided by the Capital
Improvements from the Davis Lane Lift Station Project (September, 2021) which
provided a 16” water main connection across I90 to the water main stub adjacent to the
SE corner of the Nelson Meadows Subdivision. Up until the completion of the capital
improvements for the water distribution, the plat indicated that the fire flow rates may
not support the most intensive use or construction.
Hydraulic calculations provided in Appendix B show that the 8” service will have a
headloss of 2.07psi. Based on nearby hydrant having a capacity of approximately
7,200gpm at a residual pressure of 20 psi and the model data being a conservative
estimate given the recent installation of the Capital Improvements for Water distribution
in the area, there is adequate evidence that the design flow of 1,509.45gpm can be met
for the project.
1.1.7 Sources of Water Supply
Water is supplied from City of Bozeman.
1.1.8 Proposed Treatment Processes:
Non-applicable.
1.1.9 Sewage System Available
The area is served by the City of Bozeman wastewater treatment facility
1.1.10 Waste Disposal
Non-applicable.
8
1.1.11 Automation
Non-applicable.
1.1.12 Project Sites
a. The project site has been zoned M-1 by the City of Bozeman.
b. The existing site is bound by Nelson Rd to the east, Prince Lane on the south,
Lot 4 and Stormwater Tract 2 on the west, and Tract 1A on the north.
c. The wastewater at the site will be conveyed to the City of Bozeman’s wastewater
treatment facility.
1.1.13 Financing
Non-applicable.
1.1.14 Future Extensions
No future extension will be needed.
APPENDIX A
Nelson Meadows Water and Wastewater Design Report February 2018
APPENDIX B
Fire Flow Exhibits
CITY OF BOZEMAN
Fire Flow Request Form
PHONE (406) 582-3200 FAX (406) 582-3201
Date November 18, 2021
Location Bronken Warehouse
Pressure Zone N/A
GIS Hydrant ID# 3060
Adjacent Main Size 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/government/engineering/permits-plans-projects 2 https://gisweb.bozeman.net/Html5Viewer/?viewer=infrastructure
GIS Hydrant #
Available Flow (gpm)Residual Pressure (psi)3060
0 52.23
200 51.88
400 51.49
600 51.08
800 50.65
1,000.00 50.19
1,200.00 49.7
1,400.00 49.17
1,600.00 48.61
1,800.00 48.02
2,000.00 47.4
2,200.00 46.75
2,400.00 46.07
2,600.00 45.36
2,800.00 44.62
3,000.00 43.84
3,200.00 43.04
3,400.00 42.21
3,600.00 41.35
3,800.00 40.46
4,000.00 39.55
4,200.00 38.6
4,400.00 37.63
4,600.00 36.63
4,800.00 35.59
5,000.00 34.54
5,200.00 33.45
5,400.00 32.34
5,600.00 31.2
5,800.00 30.03
6,000.00 28.83
6,200.00 27.61
6,400.00 26.36
6,600.00 25.08
6,800.00 23.78
7,000.00 22.44
7,200.00 21.09
7,400.00 19.7
7,600.00 18.29
7,800.00 16.85
8,000.00 15.39
8,200.00 13.9
8,400.00 12.38
8,600.00 10.84
8,800.00 9.27
9,000.00 7.68
9,200.00 6.06
9,400.00 4.41
9,600.00 2.74
9,800.00 1.04
9,920.98 0
Hydrant Curve
0
10
20
30
40
50
60
0 2000 4000 6000 8000 10000 12000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
3060
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.
Project Description
Friction Method Hazen-Williams Formula
Solve For Pressure at 1
Input Data
Pressure 2 0.00 psi
Elevation 1 4586.85 ft
Elevation 2 4589.31 ft
Length 59.00 ft
Roughness Coefficient 130.000
Diameter 8.00 in
Discharge 1509.45 gpm
Results
Pressure 1 2.07 psi
Headloss 2.31 ft
Energy Grade 1 4593.06 ft
Energy Grade 2 4590.75 ft
Hydraulic Grade 1 4591.62 ft
Hydraulic Grade 2 4589.31 ft
Flow Area 0.35 ft²
Wetted Perimeter 2.09 ft
Velocity 9.63 ft/s
Velocity Head 1.44 ft
Friction Slope 0.03917 ft/ft
Worksheet for Pressure Pipe - 1
12/6/2021 8:14:52 AM
Bentley Systems, Inc. Haestad Methods Solution CenterBentley FlowMaster V8i (SELECTseries 1) [08.11.01.03]
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 1of1Page