HomeMy WebLinkAbout013 Water Design Report Allison PH IV A - The Boötes
WATER MAIN
DESIGN REPORT
FOR:
ALLISON SUBDIVISION
PHASE IV A
BOZEMAN, MT
Prepared By:
Madison Engineering
895 Technology Drive, Suite 203
Bozeman, MT 59718
(406) 586-0262
SEPTEMBER 2020
ALLISON SUBDIVISION PHASE IVA
WATER SYSTEM DESIGN REPORT
A. General
This design report will give an overview of the proposed water main extension for the 21.61 acre
development of Allison Subdivision Phase IV A (Section 24, Township 02S, Range 5E, Plat J-
608A) located at the intersection of Arnold Street and S. 11th Avenue in Bozeman. The report
includes a description of the proposed water main and design parameters. The proposed
improvements are anticipated to be constructed during 2020 and 2021. Once the water mains are
constructed and approved, the mains will become a part of the City of Bozeman system.
According to an exploratory soil test pits on site, the soil consists of topsoil to a depth of 1.0’,
followed by lean clay (brown, medium stiff, silt lenses) to a depth of 7.5’, followed by well
graded gravel (multi colored, very dense to medium dense) to a depth of 17.0’. Groundwater
was observed in spring and summer of 2019 and 2020, and the highest (shallowest) groundwater
measurement was 3.17’ of the surface. The average seasonal high groundwater depth at the six
(6) wells was 5.32’ from the surface. The soil and groundwater found on site are suitable for this
project.
The following references were used in the preparation of this report:
a. COB Design Standards and Specifications Policy, 2004. Addendum #7
b. COB Modifications to Montana Public Works Standard Specifications (MPWSS),
Addendum #3.
c. DEQ Circular No. 1
d. City of Bozeman Zoning Map
e. Uniform Plumbing Code
f. City of Bozeman Water Facility Plan Update, July 2017
B. Existing Water Supply
The proposed water main extension will be served from the existing City of Bozeman water
distribution system in S. 11th Ave, Arnold St, and Opportunity Way. The proposed project in
relation to nearby mains is displayed on the Water System exhibit in the Appendix. An overall
map of the system from the 2017 Water Facilities Plan showing the proposed project in
relationship to the entire system is also included in the appendix. The following information
regarding pressures of the existing system was obtained from the City of Bozeman:
Hydrants at the intersection of Campus Blvd and S. 11th Ave.
Static Pressure: 76 psi
Pitot Pressure: 68 psi
Residual Pressure: 72 psi
Hydrant Discharge: 1,385 gpm during test, 2.5" port
Distribution Main Capacity – Fire flow at minimum residual pressure
Qr = Qt[(Ps – Pm)/(Ps – Pr)]0.54
Qr = 1,385 [(76 – 20)/(76 – 72)]0.54
Qr = 6,071 gpm at 20 psi
Where:
Qt = Hydrant Discharge During Test Pm = Minimum Residual Pressure
Qr = Fire Flow at Minimum Residual Pressure Pr = Residual Pressure
Ps = Static Pressure
Pt = Pitot Pressure
C. Future Water Demands
Future phases of the development include Allison Phase IV B, Phase IV Future, and Phase V.
These future phases are zoned for R-1 & R-2, single and multi family residential development.
The backbone trunk mains to serve the future phases include the existing 12” trunk main in S
11th Ave, the existing 12” trunk main in Graf St, and the proposed 12” trunk main in Arnold St.
Where the future phases abut these trunk mains, 8” main stubs into the future phase areas are
provided. The existing and proposed water mains in relation to the future project phase locations
are displayed on the Water System exhibit in the appendix. A future water design report will be
provided with the future phases to describe the internal water mains for these future phases,
identify system demands, and perform a capacity analysis. Because there is a network of
existing trunk mains, it is anticipated that there will be adequate capacity to serve these future
developments.
D. Proposed Water System
The proposed water main extension will consist of approximately 3,920 linear feet of 8" Class 51
Ductile Iron Pipe looped throughout the subdivision and approximately 780 linear feet of 12"
Class 51 Ductile Iron Pipe in Arnold St. The water main will be 12" in Arnold Street and 8" in
the local streets, looped throughout the subdivision.
The layout of the proposed water main will meet the City of Bozeman design criteria and will be
located within the proposed right-of ways or easements and separated from the proposed sanitary
sewer main by a minimum distance of 10 feet. Fire hydrants will be installed so not to exceed
600’ spacing, fulfilling the distance requirement for fire hydrant spacing, as well as assisting in
flushing of the main. Written correspondence from the City of Bozeman Fire Marshall
approving the fire hydrant locations has been provided. Gate valves will be installed at the
connection point to the existing mains as required by the City of Bozeman design standards.
E. Capacity Analysis
A capacity analysis was performed on the proposed water main extension. The water main
extension has been designed to meet the maximum day demand plus fire flow and has also been
checked for the peak hour demand. Phase IV contains R-1, R-2 and R-3 zoning. The analysis
was completed based on 170 gpd per capita usage and 2.17 persons per unit. The number of
dwelling units per acre is from Table V-1 of the City design standards and based on gross area.
Table 1 below outlines the water demand calculations for the proposed main.
TABLE 1: WATER DEMAND – RESIDENTIAL
ALLISON SUBDIVISION PHASE IV A
Zoning Area
(acres)
Dwelling
Units/Acre
Density
(residents
/unit)
Total
Residents
Daily Flow
Rate/resident
(gpd)
Total
Flow
(gpd)
R-1 11.44 3.9 2.17 97 170 16,490
R-2 5.12 5.2 2.17 58 170 9,860
R-3 4.53 6.5 2.17 64 170 10,880
Total Flow (gpd) 37,230
Total Flow (gpm) 25.85
Based on these parameters, Phase IV A of Allison Subdivision will require an estimated water
usage of 37,230 gal/day, or an average daily demand of 25.85 gpm.
In addition to the average daily demand, the water main extension must account for peak periods
of daily use. Peaking factors are applied to the demand and account for these peak periods in
daily use. The peaking factors used are maximum daily use and peak hour and are obtained from
the City of Bozeman Design Standards. Table 2 shows the peaking factors and the resultant
flows from those factors when applied to the average daily demand of 25.85 gpm.
TABLE 2
PEAKING FACTORS
Flow Designation Peaking Factor Flow (gpm)
Average Day Demand 1 26
Maximum Day Demand 2.3 60
Maximum Hour Demand 3 78
The required fire flow was estimated for allowable uses within the R-3 zone, which has a higher
allowable population density than R-1 and R-2. R-3 zoning allows up to 4-household dwellings
and townhouses/rowhouses with five attached units or less. Based on this criteria, it is estimated
that the buildings within the R-3 lots will have a gross square footage of 10,000 sf, be non-
sprinklered, and have Type V-B construction. Per the adopted 2015 International Fire Code, a
2,750 gpm flow is required for the estimated structure characteristics.
A hydraulic analysis was performed using WaterCAD in order to determine operating conditions
and available fire flow. A Hazen-Williams “C” Factor of 130 was used in the pipe evaluation.
The working residual water pressure shall not be less than 20 psi at any point in the water
distribution system under maximum day plus fire flow. The velocity shall not exceed 15 feet per
second through the main line under peak hour conditions.
Results
The WaterCAD model shows that the available fire flows range from 3,083 gpm to 4,500 gpm
under the peak hour scenario. Based on the analysis, the proposed water mains within the
subdivision have adequate capacity for the maximum day demand plus fire flow and peak hour
demand. No operating conditions were outside of the required conditions during the peak hour
demand. A WaterCAD exhibit and reports for both the maximum demand plus fire flow and
peak hour scenarios are included in the appendix.
F. Conclusion
Based on this analysis, the proposed 8-inch water main extensions for the development of
Allison Subdivision Phase IV A provide adequate service to meet the fire flow plus maximum
day demand and the peak hour flows for the development.
The proposed 12-inch water main extension in Arnold Street was sized to provide continuity
with the Water Facility Plan Recommendation and to ensure adequate capacity for the
surrounding area, once developed. The City of Bozeman has provided a letter indicating that
adequate capacity exists in their water system to serve the development. The letter is attached to
this report.
This project will require the approval of the City Engineer and MDEQ.
Appendix
Water Facilities Plan Overall Water System Exhibit
Allison Subdivision Water System Exhibit
WaterCAD exhibit and reports
City of Bozeman Capacity to Serve Letter
City of Bozeman Fire Marshall Correspondence
Appendix:
Water System Exhibits
EMEM WVWV WV WV WV WVWVWVWV
WV
WVWV
WVWV WV
WV
WV
WVYDHYDH YDHYDH
YDHYDHYDH
WV
WV
ALLISON PHASE V
48.65 AC R-1
ALLISON PHASE IV
B & FUTURE
22.42 AC R-1
4.71 AC R-2
ALLISON PHASE IV A
11.44 AC R-1
5.12 AC R-2
4.53 AC R-3 H20 SYSTEMMADISON ENGINEERING895 TECHNOLOGY BLVD, STE 203, BOZEMAN, MT 59718PHONE (406) 586-0262ALLISON SUBDIVISION PHASE 4EXISTING WATER SYSTEMBOZEMAN,MT1 inch =
0
SCALE
500 feet
1000'250'500'
WaterCad Exhibit and Results
Scenario: Peak Hour Flow
P-57
P-58
P-38
Page 1 of 127 Siemon Company Drive Suite 200 W
Watertown, CT 06795 USA +1-203-755-1666
6/17/2020
WaterCAD CONNECT Edition Update 2
[10.02.00.43]
Bentley Systems, Inc. Haestad Methods Solution
CenterAllison WaterCad 2020-06-16.wtg
Scenario: Peak Hour Flow
Current Time Step: 0.000 h
FlexTable: Pipe Table
G:\ACAD\2018\18-118 Allison Sub\dwg\Civil\WaterCad\Allison WaterCad 2020-06-16.wtg
Label
Length
(Scaled) (ft)
Start
Node
Stop
Node
Diameter
(in)
Hazen-
Williams C
Minor Loss
Coefficient (Local)
Flow
(gpm)
Velocity
(ft/s)
P-1 62 R-2 PMP-1 48.0 140.0 0.000 85 0.02
P-2 54 PMP-1 J-39 48.0 140.0 0.000 85 0.02
P-3 48 H-36 J-50 6.0 130.0 2.700 0 0.00
P-4 22 H-42 J-43 6.0 130.0 2.700 0 0.00P-5 133 J-43 J-39 12.0 130.0 0.000 -85 0.24
P-6 16 H-40 J-41 6.0 130.0 2.700 0 0.00
P-7 618 J-38 J-56 8.0 130.0 0.000 11 0.07
P-8 22 H-44 J-45 6.0 130.0 2.700 0 0.00P-9 344 J-49 J-43 12.0 130.0 0.000 -85 0.24
P-10 26 J-45 J-49 12.0 130.0 0.000 -85 0.24
P-11 434 J-47 J-45 12.0 130.0 0.000 -85 0.24
P-12 168 J-31 J-47 12.0 130.0 0.000 -85 0.24P-13 139 J-41 J-32 12.0 130.0 0.000 -41 0.12
P-14 425 J-50 J-41 12.0 130.0 0.000 -41 0.12
P-15 11 J-32 J-31 12.0 130.0 0.000 -85 0.24
P-16 139 J-50 J-23 8.0 130.0 0.000 30 0.19P-17 424 J-23 J-14 8.0 130.0 0.000 6 0.04
P-18 228 J-14 J-51 8.0 130.0 0.000 6 0.04
P-19 51 J-23 J-18 8.0 130.0 0.000 25 0.16
P-20 126 J-24 J-54 8.0 130.0 0.000 16 0.10P-21 29 J-54 J-10 8.0 130.0 0.000 6 0.04
P-22 233 J-51 J-24 8.0 130.0 0.000 -11 0.07
P-23 69 J-18 J-27 8.0 130.0 0.000 8 0.05
P-24 29 J-15 J-16 8.0 130.0 0.000 -17 0.11P-25 29 J-17 J-18 8.0 130.0 0.000 -17 0.11
P-26 51 J-21 J-22 8.0 130.0 0.000 -17 0.11
P-27 101 J-10 J-22 8.0 130.0 0.000 6 0.04
P-28 209 J-27 J-16 8.0 130.0 0.000 11 0.07P-29 131 J-32 J-25 12.0 130.0 0.000 44 0.12
P-30 50 J-27 J-12 8.0 130.0 0.000 -4 0.02
P-31 206 J-12 J-6 8.0 130.0 0.000 -4 0.02
P-32 380 J-6 J-54 8.0 130.0 0.000 -4 0.02P-33 432 J-54 J-2 8.0 130.0 0.000 6 0.04
P-34 158 J-16 J-55 8.0 130.0 0.000 -6 0.04
P-35 406 J-55 J-37 8.0 130.0 0.000 -6 0.04
P-36 50 J-2 J-37 8.0 130.0 0.000 6 0.04P-37 10 H-9 J-10 6.0 130.0 0.000 0 0.00
P-38 10 H-1 J-2 6.0 130.0 2.700 0 0.00
P-39 10 H-5 J-6 6.0 130.0 2.700 0 0.00
P-40 10 H-7 J-8 6.0 130.0 2.700 0 0.00P-41 10 H-3 J-4 6.0 130.0 2.700 0 0.00
P-42 27 J-37 J-28 8.0 130.0 0.000 0 0.00
P-43 48 J-33 J-49 12.0 130.0 0.000 0 0.00
P-44 23 H-46 J-47 6.0 130.0 2.700 0 0.00P-45 19 H-13 J-14 6.0 130.0 2.700 0 0.00
P-46 127 J-35 J-32 12.0 130.0 0.000 0 0.00
P-47 10 H-11 J-12 6.0 130.0 2.700 0 0.00
P-48 59 J-49 J-34 12.0 130.0 0.000 0 0.00P-49 296 J-38 J-50 12.0 130.0 0.000 -11 0.03
P-50 51 J-19 J-20 8.0 130.0 0.000 0 0.00
P-51 122 J-20 J-56 8.0 130.0 0.000 -11 0.07
P-52 30 J-56 J-30 8.0 130.0 0.000 0 0.00P-53 146 J-8 J-20 8.0 130.0 0.000 -11 0.07
P-54 160 J-29 J-53 8.0 130.0 0.000 0 0.00
P-55 219 J-53 J-24 8.0 130.0 0.000 27 0.17
P-56 425 J-25 J-4 12.0 130.0 0.000 27 0.08P-57 33 J-4 J-53 12.0 130.0 0.000 27 0.08
P-58 330 J-53 J-26 12.0 130.0 0.000 0 0.00
P-59 177 J-22 J-8 8.0 130.0 0.000 -11 0.07
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Scenario: Peak Hour Flow
Current Time Step: 0.000 h
FlexTable: Junction Table
G:\ACAD\2018\18-118 Allison Sub\dwg\Civil\WaterCad\Allison WaterCad 2020-06-16.wtg
Label Elevation
(ft)
Demand
(gpm)
Hydraulic
Grade (ft)
Pressure
(psi)
Pressure
(Minimum)
(psi)
H-1 4,964.00 0 5,137.44 75 75
H-3 4,963.00 0 5,137.45 75 75
H-5 4,963.00 0 5,137.44 75 75
H-7 4,955.00 0 5,137.44 79 79
H-9 4,963.00 0 5,137.44 75 75
H-11 4,962.00 0 5,137.44 76 76
H-13 4,966.00 0 5,137.44 74 74
H-36 4,963.00 0 5,137.44 75 75
H-40 4,963.00 0 5,137.45 75 75
H-42 4,983.00 0 5,137.47 67 67
H-44 4,978.00 0 5,137.46 69 69
H-46 4,972.00 0 5,137.45 72 72
J-2 4,956.00 0 5,137.44 79 79
J-4 4,955.00 0 5,137.45 79 79J-6 4,955.00 0 5,137.44 79 79
J-8 4,947.00 0 5,137.44 82 82
J-10 4,950.00 0 5,137.44 81 81J-12 4,953.00 0 5,137.44 80 80
J-14 4,958.00 0 5,137.44 78 78
J-15 4,956.00 17 5,137.44 78 78J-16 4,950.00 0 5,137.44 81 81
J-17 4,954.00 17 5,137.44 79 79
J-18 4,954.00 0 5,137.44 79 79J-19 4,945.00 0 5,137.44 83 83
J-20 4,945.00 0 5,137.44 83 83
J-21 4,955.00 17 5,137.44 79 79
J-22 4,958.00 0 5,137.44 78 78
J-23 4,955.00 0 5,137.44 79 79
J-24 4,953.00 0 5,137.44 80 80
J-25 4,957.00 17 5,137.45 78 78
J-26 4,949.00 0 5,137.45 82 82
J-27 4,953.00 0 5,137.44 80 80
J-28 4,944.00 0 5,137.44 84 84
J-29 4,957.00 0 5,137.45 78 78
J-30 4,944.00 0 5,137.44 84 84
J-31 4,957.00 0 5,137.45 78 78
J-32 4,957.00 0 5,137.45 78 78J-33 4,968.00 0 5,137.46 73 73
J-34 4,968.00 0 5,137.46 73 73
J-35 4,956.00 0 5,137.45 79 79J-37 4,944.00 0 5,137.44 84 84
J-38 4,948.00 0 5,137.44 82 82
J-39 4,975.00 0 5,137.48 70 70J-41 4,955.00 0 5,137.45 79 79
J-43 4,973.00 0 5,137.47 71 71
J-45 4,968.00 0 5,137.46 73 73J-47 4,958.00 0 5,137.45 78 78
J-49 4,968.00 0 5,137.46 73 73
J-50 4,955.00 0 5,137.44 79 79
J-51 4,955.00 17 5,137.44 79 79
J-53 4,955.31 0 5,137.45 79 79
J-54 4,950.54 0 5,137.44 81 81
J-55 4,948.32 0 5,137.44 82 82
J-56 4,944.20 0 5,137.44 84 84
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6/17/2020file:///C:/Users/Tech7/AppData/Local/Temp/Bentley/WaterCAD/h4w0ukmn.xml
Scenario: Peak Hour Flow
Current Time Step: 0.000 h
FlexTable: Reservoir Table
G:\ACAD\2018\18-118 Allison Sub\dwg\Civil\WaterCad\Allison WaterCad 2020-06-16.wtg
ID Label Elevation (ft)Flow (Out
net) (gpm)
Hydraulic
Grade (ft)
114 R-2 4,995.00 85 4,995.00
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Scenario: Peak Hour Flow
Current Time Step: 0.000 h
FlexTable: Pump Table
G:\ACAD\2018\18-118 Allison Sub\dwg\Civil\WaterCad\Allison WaterCad 2020-06-16.wtg
ID Label Elevation
(ft)
Pump
Definition
Status
(Initial)
Hydraulic Grade
(Suction) (ft)
Hydraulic Grade
(Discharge) (ft)
Flow
(Total)
(gpm)
Pump
Head (ft)
115 PMP-1 4,990.00 Pump Definition - 1 On 4,995.00 5,137.48 85 142.48
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Scenario: Automated Fire Flow Analysis
Current Time Step: 0.000 h
Fire Flow Node FlexTable: Fire Flow Report
G:\ACAD\2018\18-118 Allison Sub\dwg\Civil\WaterCad\Allison WaterCad 2020-06-16.wtg
Label Fire Flow (Needed) (gpm)
Fire Flow (Available) (gpm)
Flow (Total Needed) (gpm)
Flow (Total Available) (gpm)
Pressure (Calculated Residual)
(psi)
Pressure (Zone Lower
Limit) (psi)
Pressure (Calculated Zone Lower
Limit) (psi)
Junction w/ Minimum Pressure
(Zone)
Velocity of Maximum Pipe (ft/s)
Pipe w/ Maximum Velocity
H-1 2,750 3,083 2,750 3,083 20 20 48 J-2 11.55 P-33
H-3 2,750 3,566 2,750 3,566 20 20 54 H-13 10.36 P-15H-5 2,750 3,248 2,750 3,248 20 20 51 J-6 11.13 P-30H-7 2,750 3,300 2,750 3,300 20 20 52 J-8 13.02 P-21
H-9 2,750 4,500 2,750 4,500 29 20 37 J-22 22.25 P-21
H-11 2,750 3,349 2,750 3,349 20 20 50 H-5 14.97 P-30H-13 2,750 3,101 2,750 3,101 20 20 51 J-14 10.12 P-17H-36 2,750 3,187 2,750 3,187 20 20 56 H-13 9.28 P-5
H-40 2,750 3,577 2,750 3,577 20 20 54 H-13 10.39 P-9
H-42 2,750 3,673 2,750 3,673 20 20 62 H-44 10.66 P-5H-44 2,750 3,575 2,750 3,575 20 20 60 H-42 10.38 P-5H-46 2,750 3,480 2,750 3,480 20 20 58 H-44 10.11 P-5
J-2 2,750 4,327 2,750 4,327 23 20 20 H-1 16.21 P-33
J-4 2,750 4,500 2,750 4,500 46 20 42 H-3 13.01 P-11J-6 2,750 4,500 2,750 4,500 29 20 26 H-5 15.42 P-30J-8 2,750 4,500 2,750 4,500 30 20 26 H-7 17.72 P-21
J-10 2,750 4,500 2,750 4,500 39 20 34 H-9 22.25 P-21
J-12 2,750 4,500 2,750 4,500 35 20 31 H-11 20.12 P-30J-14 2,750 4,500 2,750 4,500 26 20 23 H-13 14.68 P-17J-15 2,750 4,500 2,767 4,517 21 20 28 J-16 28.83 P-24
J-16 2,750 4,500 2,750 4,500 28 20 25 J-15 19.61 P-28
J-17 2,750 4,500 2,767 4,517 35 20 37 H-11 28.83 P-25J-18 2,750 4,500 2,750 4,500 39 20 37 H-11 19.15 P-19J-19 2,750 4,500 2,750 4,500 22 20 28 J-20 28.72 P-50
J-20 2,750 4,500 2,750 4,500 28 20 28 J-19 15.93 P-21J-21 2,750 4,500 2,767 4,517 25 20 31 J-22 28.83 P-26J-22 2,750 4,500 2,750 4,500 31 20 32 J-21 20.29 P-21J-23 2,750 4,500 2,750 4,500 41 20 38 H-13 16.02 P-16
J-24 2,750 4,500 2,750 4,500 42 20 38 H-13 14.06 P-55J-25 2,750 4,500 2,767 4,517 48 20 46 H-13 13.01 P-11J-26 2,750 4,500 2,750 4,500 42 20 42 H-3 13.01 P-9
J-27 2,750 4,500 2,750 4,500 38 20 34 H-11 16.93 P-19
J-28 2,750 4,389 2,750 4,389 23 20 20 H-1 28.01 P-42J-29 2,750 4,500 2,750 4,500 24 20 42 H-3 28.72 P-54J-30 2,750 4,500 2,750 4,500 24 20 28 J-56 14.52 P-21
J-31 2,750 4,500 2,750 4,500 50 20 47 H-13 13.01 P-5
J-32 2,750 4,500 2,750 4,500 50 20 46 H-13 13.01 P-5J-33 2,750 4,500 2,750 4,500 56 20 53 H-44 13.01 P-5J-34 2,750 4,500 2,750 4,500 56 20 53 H-44 13.01 P-5
J-35 2,750 4,500 2,750 4,500 48 20 46 H-13 13.01 P-5
J-37 2,750 4,389 2,750 4,389 27 20 20 H-1 15.81 P-33J-38 2,750 4,500 2,750 4,500 45 20 42 H-13 13.01 P-5J-39 2,750 4,500 2,750 4,500 63 20 60 H-42 0.81 P-2
J-41 2,750 4,500 2,750 4,500 49 20 45 H-13 13.01 P-9
J-43 2,750 4,500 2,750 4,500 61 20 57 H-42 13.01 P-5J-45 2,750 4,500 2,750 4,500 57 20 52 H-44 13.01 P-9J-47 2,750 4,500 2,750 4,500 53 20 47 H-46 13.01 P-5
J-49 2,750 4,500 2,750 4,500 57 20 53 H-44 13.01 P-5
J-50 2,750 4,500 2,750 4,500 45 20 42 H-36 13.01 P-5J-51 2,750 4,500 2,767 4,517 30 20 30 H-13 18.06 P-22J-53 2,750 4,500 2,750 4,500 45 20 42 H-3 13.01 P-15
J-54 2,750 4,500 2,750 4,500 41 20 36 H-9 14.14 P-20
J-55 2,750 4,500 2,750 4,500 24 20 27 H-1 17.46 P-28J-56 2,750 4,500 2,750 4,500 28 20 28 J-30 14.52 P-21
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City of Bozeman Capacity to Serve
Letter
City of Bozeman Fire Marshall
Correspondence
1
Mark
From:Scott Mueller <SMueller@BOZEMAN.NET>
Sent:Tuesday, September 8, 2020 4:02 PM
To:'mark@mad-eng.com'
Subject:RE: Allison Subdivision Phase IV Hydrant Locations
Mark,
Please accept this email as approval of fire hydrant locations, existing and proposed for the Allison Subdivision Phase
IV. Also know we are included on proper placement with approved design.
Bozeman Fire does not verify a specific fire hydrant type and flows. The hydrants types are specified in city standards
and possibly the Water Department verifies the flows.
Regards,
Scott Mueller
Deputy Chief Fire Marshal
Bozeman Fire Department
34 N Rouse Ave
Bozeman, MT 59715
Office (406) 582-2353 Mobile (406) 589-6271
From: Mark <mark@mad-eng.com>
Sent: Tuesday, September 8, 2020 9:12 AM
To: Scott Mueller <SMueller@BOZEMAN.NET>
Cc: chris@mad-eng.com
Subject: Allison Subdivision Phase IV Hydrant Locations
Scott,
I’ve attached an exhibit displaying the fire hydrants for the proposed Allison Phase IV subdivision located in Bozeman
southeast of the corner of S 11th Ave and Opportunity Way. The Preliminary Plat (Application 19002) was approved in
March of 2020. Hydrants have been provided at each street intersection and at intermediate points so that hydrants are
spaced no less than 350-600 feet.
Montana DEQ has requested that we obtain written correspondence from the Fire Marshall approving of the new
hydrant locations. Would you please provide written approval of the hydrant locations? Or, respond with any
concerns? Please let me know.
Thank you,
Mark Juras, PE
Madison Engineering, LLC
895 Technology Boulevard, Suite 203
Bozeman, MT 59718
406.586.0262 office
406.868.8213 cell
mark@mad-eng.com
2
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Allison Subdivision Phase IV A Water System Design Report The Boötes
Addendum I
-
August 2023
Daily Water Usage Analysis
The Boötes Residential Development
Average Daily Flow
No of Units 71
Residents/unit 2.11
Gallons per Capita/day 170
Average Daily Flow 25,468 gpd
Peaking Factor Calculations
Zoning Density
(residents/unit)
Total
Population
R3 2.11 150
=Q(max)=18 +P 0.50 P = Population/thousands = 47\3/1000 = 0.150
Q(ave)4 +P 0.50
Peaking Factor =
Peak Hour Water Usage
Average Daily Usage 25,468 gpd
Maximum Hour Usage 76,403 gpd
Maximum Hour Usage 3183.5 gph
Maximum Hour Usage 53.1 gpm
Maximum Fire Flow Demand 1500.0 gpm
Maximum Hour and Fire Flow Demand 3.5 cfs
4.19
Peaking
Factor
Units/AcreAcres
3.63 19.56