HomeMy WebLinkAbout29-PLNAPP-569_WaterDemandCertificationLetter
LOCATIONS WORLDWIDE
4001 Kennett Pike, Suite 308 | Wilmington, DE 19807 | 302.300.1400 | www.telgian.com
August 26, 2022
Ms. Janet Reid
Development Manager
Greenberg Farrow
21 South Evergreen Avenue, Suite 200
Arlington Heights, IL 60005
Phone: 214-697-9771
Texas Roadhouse
Fire Flow Analysis
Bozeman, MT
Dear Ms. Reid,
The requested water supply test and site flow analysis for the subject project are detailed in this report
and submitted for review and posting.
SUMMARY OF RESULTS (CONCLUSION C1 - AS DESIGNED)
Fire Hydrant Static Pressure: 105.0 psi
Fire Hydrant Residual Pressure H1: 98.0 psi @ 1500 gpm
Safety Factor Utilized in Calculations: 0.0 psi
Fireline Backflow Preventer Required: No backflow prevention device utilized for fire flow calculations.
A fire pump WILL NOT be required for fire flow demands. A water storage tank WILL NOT be required for
fire flow demands.
Assumptions:
Water supply calculations presented herein are based on Telgian’s best understanding of the final fire
suppression system riser and lead-in locations. Actual system demands may vary depending on several
factors. Calculations presented in this report take as many variables into account as possible but
recommendations may change in some situations where available water pressure is borderline. It is highly
recommended that additional reviews and, if necessary, calculations be completed if assumptions
presented in this report change in any way.
Fire Flow Analysis
Texas Roadhouse
870 Harmon Stream Blvd.
Bozeman, MT TEST DATE: 10/7/21
Information Gathered:
1. Telgian Engineering & Consulting received water modeling results from The City of Bozeman
dated October 7, 2021. This analysis is based on results from that test.
2. Water main sizes and layout were provided by The City of Bozeman.
The Site:
This site is located in the southwest portion of Bozeman, MT along Harmon Stream Blvd. An 8-inch ductile
iron water main is located along Harmon Stream Blvd. and is proposed that it is to supply a 4-inch service
to this property. The arrangement of these lines in the immediate vicinity of the property is shown on
Attachment #1 – Location Sketch.
The Public System:
Information regarding this supply could not be obtained.
Water Model Data:
The following summarizes the water model scenario:
Static and residual pressures were modeled from the hydrant south of the proposed building,
approximately 20-ft south of the most southern exterior wall. Please see Attachment #1 – Location Sketch
for the locations of hydrant #2264 (H1). The water model scenario produced a flow of 2,000 gpm at a
residual pressure of 94.8 psi. Static pressure at zero flow was 105.3 psi. The modeled hydrant is at an
elevation of 4,870 ft., AMSL, which is even with the assumed finish floor elevation of the building (4,870
ft., AMSL). This test is effective at the base of the modeled hydrant for friction loss purposes. Please see
enclosed Attachment #3 for a graphical representation of this test and necessary calculations. The water
model scenario includes the maximum daily demand.
* Adjustments were made for assumed pipe friction loss to the site entry point, (-0.5 psi), elevation change
(0.0 psi). See following comments for additional information.
Additional Comments:
Information could not be obtained regarding MIC testing within the water system. It is assumed there
has been no evidence of MIC within this area.
The City of Bozeman has adopted Fire Flow requirements from Appendix B of the 2012 International Fire
Code. The building is considered a Type II-B construction and the requirements are based off of Table
B105.1 for a target demand of 1,750 gpm at 20 psi for a duration of 2 hours. This demand is reduced to
the minimum 1,500 gpm based off a 75% reduction for a fully sprinklered building.
Fire Flow Analysis
Texas Roadhouse
870 Harmon Stream Blvd.
Bozeman, MT TEST DATE: 10/7/21
Conclusions:
C1. FIRE HYDRANT FLOW SUPPLY: The water model scenario, as shown on Attachment #3, should yield
the required fire hydrant flow rate of 1,500 gpm at 98 psi. This exceeds the minimum target demand of
1,500 gpm at 20 psi required by the 2012 International Fire Code. See Attachment #2 for a graphical
representation and necessary calculations.
This analysis assumes that the installation meets the design parameters and information stated herein.
If changes are made, they should be analyzed to determine resultant effects on the water supply.
If you need additional information, please feel free to contact us.
Sincerely,
Ken Greenfield
Fire Protection Consultant
kgreenfield@telgian.com
Phone: 480-848-1417
ATTACHMENTS:
Attachment #1 – Site Sketch
Attachment #2 – Water Supply Plot – Fire Sprinkler Calculations
Attachment #3 – City of Bozeman Water Model
Reviewed by:
Alexander Gonzales, PE
Assistant Regional Practice Leader
Fire Protection Engineering
Telgian Engineering & Consulting
TEXAS
ROADHOUSE
7,831 sf
±0.44 ACRES
HUFFLINE L
A
N
E
OPEN SPACE 6
± 1.46 ACRES
SITE SKETCH 3 - 7,831 sf
DATE: MAY 27, 2021
GF PROJECT #: 20210037.0
TEXAS ROADHOUSE - BOZEMAN, MT
SEQ HUFFLINE LANE AND HARMON STREAM B;VD
PARKING: REQUIRED PROVIDED
TBV SPACES 197 SHARED
SPACES
BOR
New 4" D.I. Main
Ex. 8" D.I. Main
Model Test
Hydrant #2264
Texas Roadhouse Bozeman, MT
Attachment #1 - Site Sketch
Ken Greenfield, Telgian Engineering & Consulting
8-26-2022
Note:
This Drawing is for information only and should not be used for
construction purposes and/or exact main locations.
#
SRC 1
- Hydraulic Node
- Water Model Test Hydrant
H1
2 PAGE 1 OF 3
PROJECT:
LOCATION:
CITY/STATE:
Static (psi) Residual (psi) Flow (gpm)
Gauge Hydrant
Elevation (ft)
Building FFE
(ft)
105 94 2000 4870 4870
Outlet
Diameter #1
(in)
Hydrant
Coefficient #1 Pitot #1 (psi)
Outlet
Diameter #2
(in)
Hydrant
Coefficient #2 Pitot #2 (psi)
Outlet
Diameter
#3 (in)
Hydrant
Coefficient
#3
Pitot #3
(psi)
Outlet
Diameter
#4 (in)
Hydrant
Coefficient
#4
Pitot #4
(psi)
Test By:Date: Time:
None Type:Mfg: Model:
Mfg: Model:
0 1500
Static (psi)
1. 105 98.5 gpm psi
2.0 0 1500 20
0 -0.5
4. 105 98.0
5.
6.
7. 105 98
8.0
9. 105 98.0
Residual (psi) Total Fire Flow Demand
Pressure available at test
Elevation Adjustment
Pressure loss due to friction
Pressure at remote hydrants
upstream of BFP & meter
BFP loss/preload
Pressure at remote hydrants
downstream of BFP & meter
Available combined pressure at
Total Fire Flow Demand
N/A
Backflow Prevention: Size:
3.
Bozeman, MT
ATTACHMENT #
WATER SUPPLY SITE SURVEY Texas Roadhouse
FIRE HYDRANT DEMAND 870 Harmon Stream Blvd.
Distributed Fire Flows (gpm)
Gauge Hydrant Location:Water Model (See attachment)
Flow Hydrant Location:Water Model (See attachment)
City of Bozeman Water Model 10/7/2021
1500gpm @ 20psi
0
10
20
30
40
50
60
70
80
90
100
110
120
0 400 800 1200 1600 2000 2400 2800Pressure (psi)Flow (gpm)
Observed Flow Test Point
Raw Water Flow Test
#4 Below
#7 Below
#9 Below
Fire Hydrant Demand
Telgian Engineering Consulting
SPRINKLER SYSTEM HYDRAULIC ANALYSIS Page 2 of 3
DATE: 8/26/2022 C:\USERS\KGREENFIELD\DOCUMENTS\HASSDATA\BOZEMAN.SDF
JOB TITLE:
NFPA WATER SUPPLY DATA
SOURCE STATIC RESID. FLOW AVAIL. TOTAL REQ'D
NODE PRESS. PRESS. @ PRESS. @ DEMAND PRESS.
TAG (PSI) (PSI) (GPM) (PSI) (GPM) (PSI)
SRC 105.0 94.0 2000.0 98.5 1500.0
AGGREGATE FLOW ANALYSIS:
TOTAL FLOW AT SOURCE 1500.0 GPM
TOTAL HOSE STREAM ALLOWANCE AT SOURCE 0.0 GPM
OTHER HOSE STREAM ALLOWANCES 1500.0 GPM
TOTAL DISCHARGE FROM ACTIVE SPRINKLERS 0.0 GPM
NODE ANALYSIS DATA
NODE TAG ELEVATION NODE TYPE PRESSURE DISCHARGE NOTES
(FT) (PSI) (GPM)
1 4870.0 HOSE STREAM 98.3 1500.0
BOR 4870.0 - - - - 98.3 - - -
SRC 4870.0 SOURCE 98.5 1500.0
SPRINKLER SYSTEM HYDRAULIC ANALYSIS Page 3 of 3
DATE: 8/26/2022 C:\USERS\KGREENFIELD\DOCUMENTS\HASSDATA\BOZEMAN.SDF
JOB TITLE:
NFPA PIPE DATA
Pipe Tag K-fac Add Fl Add Fl To Fit: L C (Pt)
Frm Node El (ft) PT (q) Node/ Nom ID Eq.Ln. F (Pe) Notes
To Node El (ft) PT Tot.(Q) Disch Act ID (ft.) T Pf/ft. (Pf)
Pipe: 1 Source 1500.0 Disch 15.00 120 0.2
SRC 4870.0 98.5 0.0 D8.000 ---- 0.00 -0.0
1 4870.0 98.3 1500.0 8.390 15.00 0.015 0.2
Pipe: 2 0.0 0.0 E:17.0 20.00 140 0.0
BOR 4870.0 98.3 0.0 D4.000 T:34.0 54.00 -0.0
1 4870.0 98.3 0.0 4.220 G: 3.0 74.00 0.000 0.0
NOTES (HASS):
(1) Calculations were performed by the HASS 2021 D computer program
in accordance with NFPA13 (2020)
under license no. 64622609 granted by
HRS Systems, Inc.
208 Southside Square
Petersburg, TN 37144
(931) 659-9760
(2) The system has been calculated to provide an average
imbalance at each node of 0.085 gpm and a maximum
imbalance at any node of 0.086 gpm.
(3) Total pressure at each node is used in balancing the system.
Maximum water velocity is 8.7 ft/sec at pipe 1.
(4) Items listed in bold print on the cover sheet
are automatically transferred from the calculation report.
(5) Available pressure at source node SRC under full flow conditions is
98.54 psi with a flow of 1499.98 gpm.
(6) PIPE FITTINGS TABLE
HASS Pipe Table Name: standard
PAGE: D MATERIAL: DIRON HWC: 140
Diameter Equivalent Fitting Lengths in Feet
(in) E T L C B G N F
Ell Tee LngEll ChkVlv BfyVlv GatVlv NPTee F45Ell
4.220 17.00 34.00 10.00 37.00 20.00 3.00 34.00 8.50
8.390 31.00 59.00 22.00 76.00 20.00 7.00 59.00 15.50
CITY OF BOZEMAN
Fire Flow Request Form
PHONE (406) 582-3200 FAX (406) 582-3201
Date October 7, 2021
Location Texas Roadhouse, 870 Harmon Stream Blvd
Pressure Zone Northeast HGL 5038
GIS Hydrant ID# 2264
Adjacent Main Size 8-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
Attachment #3 - City of Bozeman Water Model
1 of 2
GIS Hydrant #Available Flow (gpm) Residual Pressure (psi)22640 105.32200 104.77400 104.14600 103.37800 102.481,000.00101.471,200.00100.351,400.0099.121,600.0097.771,800.0096.332,000.0094.772,200.0093.122,400.0091.372,600.0089.522,800.0087.563,000.0085.513,200.0083.363,400.0081.113,600.0078.773,800.0076.334,000.0073.84,200.0071.174,400.0068.444,600.0065.624,800.0062.715,000.0059.75,200.0056.65,400.0053.415,600.0050.125,800.0046.756,000.0043.286,200.0039.726,400.0036.086,600.0032.346,800.0028.517,000.0024.67,200.0020.597,400.0016.57,600.0012.327,800.008.048,000.003.67Hydrant Curve 0204060801001200 1000 2000 3000 4000 5000 6000 7000 8000 9000Residual Pressure (psi)Available Flow (gpm)Hydrant Curve 2264Data 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.Attachment #3 - City of Bozeman Water Model2 of 2