HomeMy WebLinkAbout08 Concept Review Response REF #10 - The Depot - Water
THE DEPOT AT 112 S CHURCH AVE
WATER IMPROVEMENTS
WATER SERVICE DESIGN REPORT
November 2025
PREPARED BY:
MMI #: 10758.001
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Table of Contents
1.1.1 General Information .......................................................................................... 3
1.1.2 Extent of Water Works System, including: ......................................................... 3
1.1.3 Alternate Plans .................................................................................................. 3
1.1.4 Site Conditions .................................................................................................. 3
1.1.5 Water Use Data ................................................................................................ 3
1.1.6 Flow requirements ............................................................................................. 5
1.1.7 Sources of Water Supply ................................................................................... 6
1.1.8 Proposed Treatment Processes: ....................................................................... 6
1.1.9 Sewage System Available ................................................................................. 6
1.1.10 Waste Disposal ................................................................................................. 6
1.1.11 Automation……………………………………………………………………………..6
1.1.12 Project Sites……………………………………………………………………………7
1.1.13 Financing……………………………………………………………………………….7
1.1.14 Future Extensions ............................................................................................. 7
Prepared by:
Morrison-Maierle, Inc.
2880 Technology Blvd. W.
Bozeman, Montana 59771
Phone: (406) 587-0721
Fax: (406) 922-6702
Written By: CMS Checked By: MEE
Approved By: MEE
PROJECT NO.: 10758.001
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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 proposed building is located at 112 South Church Ave and was previously a
residential home. The site is approximately 0.304 acres. This project is located
within the City of Bozeman, Montana. The building will be serviced by a 4-inch
water service and a 6-inch fire service which will be tapped into the 8” main along
S. Church Ave.
b. The existing water main infrastructure will be served by the City of Bozeman.
c. Project Developer:
WAM Development Group
544 East Main St. Suite A
Bozeman, MT 59715
d. System Owner:
City of Bozeman
PO Box 1230
Bozeman, MT 59771
1.1.2 Extent of Water Works System, including:
a. The proposed water service connection will supply domestic water to the
building. The property is zoned B-3 (Downtown Business District) according to
the City of Bozeman zoning map.
b. There are no special requirements for extending the municipal water system.
c. Two proposed 6-inch fire service lines will provide fire protection for the building
and supply a fire hydrant located north of the site within the Church Avenue right-
of-way.
1.1.3 Alternate Plans
The alignments of the proposed services were chosen to meet the layout of the
proposed building project.
1.1.4 Site Conditions
a. The proposed site has existing grades of less than 4% slope. The site is
described as 100% Urban Land (USDA Soil Survey).
b. 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 seasonally
varied but from the geotechnical borings groundwater was not encountered at 9
feet deep as observed in multiple test pits in November.
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
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No. 1; Montana Public Works Standard Specifications (MPWSS); the City of Bozeman
Modifications to MPWSS; and the City of Bozeman 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 dwelling
units and commercial uses. The demand for commercial can be estimated from DEQ – 4
Table 3.1-1. For retail customer has a demand of 3 gal/capita/day and an employee of
10 gal/capita/day. For an office employee, the demand is 13 gal/capita/day. The
assumptions for each of the spaces is as follows:
Assumptions:
a. Proposed building has a retail square footage of 1,663 SF and an office square
footage of 4,021 SF
o Proposed commercial space has estimated occupancy of 100 SF/person
o Population: 57
o Employees estimated: 3
b. New water lines to serve residential areas shall be designed to accommodate
an average daily flow of 2.17 people per dwelling unit and 135 gal/capita/day.
(COB Design Standards and specifications Policy)
c. COB annual irrigation water requirement was determined by the landscape
architect. The calculation can be seen below.
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 2020, page 45.
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Based on these criteria the demands predicted for the project are:
Average Day Demand
Residential:
12 units x 2.17 persons x 135 gpd = 3,515 gpd or 2.44 gpm
Commercial:
57 customers x 3 gpd = 171 gpd
3 employees x 10 gpd = 30 gpd
Irrigation:
Based on the square footage and plant type TD&H has an approximate water budget of
12,980 gallons for the season (May-October)
Total IWR:
12,980 gal/183 days = 71 gpd
Total Average Day Demand = 3,586 gpd or 2.49 gpm
Maximum Day Demand
Average Day Demand (3,586 gpd) x 2.30 = 8,248 gpd or 5.73 gpm
Maximum Hour Demand
Average Day Demand (3,586 gpd) x 3.0= 10,758 gpd or 7.47 gpm
Fire Flow
The total water demand for the system includes the Maximum Daily Demand and the
maximum required fire flow. The building construction type is unknown but
conservatively a Type V-B building would have a requirement of 2,000gpm at 20 psi
with the 75% sprinkler reduction. 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
5.73 gpm + 2,000 gpm = 2,005.73 gpm
1.1.6 Flow Requirements
The controlling hydraulic condition form the project is the maximum daily demand plus
fire flow.
The City of Bozeman Fire Hydrant Data was provided on October 31, 2025 which
modeled the curves for Hydrant #35 and #2384. A copy of the hydrant model data is
included in Appendix A. Utilizing the City curve data, the static pressure for the
hydrants is determined by the pressure at 0 gpm. Hydrants #35 and #2384 have a
residual pressure of 125.7psi and 126.32 psi respectively.
Based on a nearby hydrant having a capacity of approximately 8,800 gpm at a residual
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pressure of 20 psi and model data, there is adequate evidence that the design flow of
2,005.7 gpm 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.
1.1.11 Automation
Non-applicable.
1.1.12 Project Sites
a. The project site has been zoned B-3 by the City of Bozeman.
b. The wastewater at the site will be conveyed to the City of Bozeman wastewater
treatment facility.
1.1.13 Financing
Non-applicable.
1.1.14 Future Extensions
No future extension will be needed.
Appendix A
CITY OF BOZEMAN
Fire Flow Report
PHONE (406) 582-2280
Date October 31, 2025
Location 112 S Church Ave
Pressure Zone South (HGL 5125)
ProjectDox # FFR-16078
GIS Hydrant ID# 35, 2384
Adjacent Main Size 8-inch DI
Model Scenario Maximum Day Demand, Steady State, Fire Flow
2017 Water Facility Plan Update1 provides system conditions.
Water Model InfoWater Pro – March 2025 Model Update
Hydrant Curves Modeled hydrant curves have been provided for the requested location (see
below).
Requested Location via the Bozeman Infrastructure Viewer2
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.
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)35
0 125.7
200 125.38
400 124.9
600 124.31
800 123.58
1,000.00 122.75
1,200.00 121.67
1,400.00 120.63
1,600.00 119.48
1,800.00 118.23
2,000.00 117.01
2,200.00 115.44
2,400.00 113.95
2,600.00 112.32
2,800.00 110.6
3,000.00 108.79
3,200.00 106.89
3,400.00 104.9
3,600.00 102.82
3,800.00 100.66
4,000.00 98.4
4,200.00 96.06
4,400.00 93.64
4,600.00 91.13
4,800.00 88.52
5,000.00 85.83
5,200.00 83.05
5,400.00 80.19
5,600.00 77.24
5,800.00 74.21
6,000.00 71.1
6,200.00 68.03
6,400.00 64.62
6,600.00 61.26
6,800.00 57.81
7,000.00 54.29
7,200.00 50.82
7,400.00 47.14
7,600.00 43.37
7,800.00 39.52
8,000.00 35.6
8,200.00 31.59
8,400.00 27.5
8,600.00 23.33
8,800.00 19.07
9,000.00 14.74
9,200.00 10.32
9,400.00 5.81
9,600.00 1.23
9,644.13 0.21
InfoWater Pro - Hydrant Curve
0
20
40
60
80
100
120
140
0 2000 4000 6000 8000 10000 12000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
35
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)2384
0 126.32
200 126.03
400 125.67
600 125.24
800 124.74
1,000.00 124.19
1,200.00 123.55
1,400.00 122.8
1,600.00 122.19
1,800.00 121.32
2,000.00 120.64
2,200.00 119.66
2,400.00 118.8
2,600.00 117.85
2,800.00 116.86
3,000.00 115.82
3,200.00 114.74
3,400.00 113.61
3,600.00 112.44
3,800.00 111.22
4,000.00 109.97
4,200.00 108.67
4,400.00 107.33
4,600.00 105.93
4,800.00 104.49
5,000.00 103.01
5,200.00 101.48
5,400.00 99.92
5,600.00 98.3
5,800.00 96.65
6,000.00 94.95
6,200.00 93.35
6,400.00 91.43
6,600.00 89.61
6,800.00 87.75
7,000.00 85.84
7,200.00 84.05
7,400.00 82.06
7,600.00 80.04
7,800.00 77.97
8,000.00 75.86
8,200.00 73.71
8,400.00 71.51
8,600.00 69.27
8,800.00 66.99
9,000.00 64.66
9,200.00 62.29
9,400.00 59.86
9,600.00 57.41
9,800.00 54.74
InfoWater Pro - Hydrant Curve
0
20
40
60
80
100
120
140
0 2000 4000 6000 8000 10000 12000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
2384
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.