HomeMy WebLinkAboutPA2023-0040_20230214_Water Fire Study dated 01-06-2023Water Model Result – Fire Hydrants
For Proposed Residential Development
FOR
1401 Quail Street
Newport Beach, CA 92660
Prepared By:
Adams-Streeter Civil Engineers, Inc.
16755 Von Karman Avenue, Suite 150, Irvine CA 92606
(949) 474-2330
January 6, 2023
1
TABLE OF CONTENTS
I. Introduction and Proposed Improvements Analysis
II. Required Fire Flowrate
III. Capacity and Conclusion
APPENDICES
A. WaterCAD Model and Demand Tables
B. Supporting Documents
2
I. INTRODUCTION AND PROPOSED IMPROVEMENTS ANALYSIS:
The subject site is currently occupied by an office building on a 1.71-acre lot located at
the north-west corner of Quail Street and Spruce Avenue. The proposed site is
redevelopment into a high-density residential podium building. The building will consist
of one underground garage, one at-grade garage, and 6-story podium. There will be a
proposed 8” private fire service connection to the 16” main on Spruce Street which will
serve one on-site hydrant as well as the sprinkler system of the proposed building. For
this analysis, existing flow and pressure at the site were determined from a Fire Hydrant
Flow Test conducted by the City of Newport Beach Utilities Department on 11/22/2022
(See Appendix B). The Fire hydrant tested (FH#B17) is located on Spruce Street,
approximately 230 feet away in the south-westerly direction from the project site. The
findings of this flow test were used to create a model of the fire water pipe network in
the immediate vicinity of the site using WaterCAD by Bentley Systems, Inc.
3
II. REQUIRED FIRE FLOWRATE
The required flowrate for each fire hydrant being used for this building was found per
the City of Newport Beach’s Fire Department’s Guideline B.01 which is in accordance
with the California Fire Code, Appendix B and Appendix C. The results of the Guideline
B.01 indicates that the proposed building requires a fire flow of 3,000gpm. The
Guideline B.01 also states that one fire hydrant is allowed to serve 1,000gpm max for
testing purposes. This means that the site will need to have a minimum of 3 available
fire hydrants. See Appendix B for Guideline B.01.
The water model was run for a total of two hydrants at a time each working at
1,000gpm. One proposed on-site hydrant (H-1) and one existing public hydrant on
Spruce Street (H-2) were taken into consideration in the water model. H-1 and H-2 are
both served by the same water main on Spruce Street which also serves FH#B17. In
order to meet the 3,000gpm and the third fire hydrant requirement, an existing public fire
hydrant located on Quail Street, approximately 30 feet from the property, will be utilized.
This fire hydrant was not included in the water model due to its water source being from
a different water main located on Quail Street. See Appendix A for the Water Model and
its supporting calculations/tables.
III. CAPACITY AND CONCLUSION
Based on the fire flow test, square footage and construction type of the proposed
building, and the required flowrate at each hydrant, there will be enough pressure (20psi
MIN) at the required flowrate.
4
Appendix A: WaterCAD Model and Demand Tables
Scenario: Base
P-1(2)
P-1(1)
P-12
P-8
P-6
P-7
P-4(2)
P-3
P-2
P-4(1)
J-3
J-17
J-7
J-6
Fire Service
J-5
J-13
PMP-1
R-1
H-1
H-2GPV-1
Page 1 of 176 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-
755-1666
12/22/2022
WaterCAD
[10.03.05.05]Bentley Systems, Inc. Haestad Methods Solution Center22-2434-Water Study.wtg
Prop. Fire
Hydrant H-1
Ex. Fire Hydrant
H-2
Ex. Fire Hydrant
#B17
Ex. Fire Hydrant
Fire Service
Project Site
WaterCAD Model
Spr
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A
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Q
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NOT TO SCALE
FlexTable: Hydrant Table
Pressure
(psi)
Hydraulic Grade
(ft)
Demand
(gpm)
Elevation
(ft)
Length (Hydrant
Lateral)
(ft)
Hydrant StatusLabel
57185.211,00053.0020OpenH-1
68209.281,00052.0020OpenH-2
Page 1 of 176 Watertown Road, Suite 2D Thomaston, CT 06787
USA +1-203-755-1666
12/13/2022
WaterCAD
[10.03.05.05]
Bentley Systems, Inc. Haestad Methods Solution
Center22-2434-Water Study.wtg
FlexTable: Junction Table
Pressure
(psi)
Hydraulic Grade
(ft)
Demand
(gpm)
Elevation
(ft)
Label
71209.62046.00J-3
62188.36046.00J-5
60185.48046.80J-6
60185.34046.80J-7
71209.40046.00J-13
61187.49046.24J-17
60187.49049.00Fire Service
FlexTable: Pump Table
Pump Head
(ft)
Flow (Total)
(gpm)
Hydraulic Grade
(Discharge)
(ft)
Hydraulic Grade
(Suction)
(ft)
Elevation
(ft)
166.132,000210.1143.9844.00
FlexTable: Pipe Table
Headloss
Gradient
(ft/ft)
Velocity
(ft/s)
Flow
(gpm)
Hazen-Williams
C
MaterialDiameter
(in)
Length (Scaled)
(ft)
Label
0.0146.381,000150.0PVC8.021P-2
0.0146.381,000150.0PVC8.012P-3
0.0146.381,000150.0PVC8.010P-5
0.0146.381,000150.0PVC8.09P-6
0.0023.192,000140.0Asbestos Cement16.08P-1(1)
0.0023.192,000140.0Asbestos Cement16.0251P-1(2)
0.0146.38-1,000150.0PVC8.09P-7
0.0146.38-1,000150.0PVC8.015P-8
0.0146.381,000150.0PVC8.063P-4(1)
0.0146.381,000150.0PVC8.0143P-4(2)
0.0000.000150.0PVC8.083P-12
WaterCAD Demand Tables
5
Appendix B: Supporting Documents
CITY OF NEWPORT BEACH
UTILITIES DEPARTMENT
FIRE HYDRANT FLOW TEST
AMOUNT PAID:$458.00 DATE:11/22/2022
CHECK NO:TIME:6:00AM
TEST NO:WEATHER:CLEAR
PROJECT:
PROJECT LOCATION:SPRUCE AVENUE
TEST CONDUCTED FOR:Nick Streeter
TEST PERFORMED BY:O'CAMPO/ AUGER
TEST WITNESSED BY:
FIELD OBSERVATIONS AND FLOW DATA
STATIC HYDRANT # : 817 LOCATION: 3661 Spruce
F/H MANUFACTURER: AVK NUMBER & SIZE OF OUTLETS: 2-2.5" 1-4"
STATIC PRESSURE, ( Ps , psi), PRE-FLOW:98
RESIDUAL PRESSURE, (Pr , psi) FLOWING:85
FLOW HYDRANT # : 818 LOCATION: 1400 Bristol
F/H MANUFACTURER:AVK NUMBER & SIZE OF OUTLETS:2-2.5" 1-4"
STATIC PRESSURE, PRE-FLOW (INFO ONLY, NOT FOR TEST CALCS) :
F/H OUTLET SIZE ( 2.5 or 4.0):2.5 (d, inches)
FLOW LOSS COEFFICIENT - TUBE C=1.0 / BUTT C=0.9 0.9
PITOT GAUGE READING ( p, psi ):67
OBSERVED FLOW: THE OBSERVED FLOW FROM A HYDRANT OUTLET IS CALCULATED FROM THE
FOLLOWING EQUATION:
WHERE; Q IS THE OBSERVED FLOW IN GPM; d IS THE OUTLET DIAMETER IN INCHES; p IS THE PITOT GAUGE
PRESSURE IN PSI; AND C IS THE FLOW LOSS COEFFICIENT ( C = 1.0 FOR FLOW TUBES AND C = 0.9 FOR BUTT
FLOW READINGS ).
OBSERVED FLOW (Qs, gpm):1373 GPM
DISCHARGE CALCS: THE DISCHARGE FOR A GIVEN FIRE HYDRANT CAN BE DETERMINED FROM THE FOLLOWING
EQUATION USING THE INITIAL ( STATIC ) WATER PRESSURE AND THE RESIDUAL ( DYNAMIC )
WATER PRESSURE:
WHERE; Q ( STATIC OR RESIDUAL ) IS THE FLOW IN GPM; AND P ( STATIC OR RESIDUAL ) IS THE
PRESSURE IN PSI. NOTE: A 10 PSI DROP IS REQUIRED FOR VALID TEST!
CALCULATED FLOW AT 20 psi (Qr, gpm):3614 GPM
Q s =29.83 Cd 2()p2
Q r =Q s
Ps -20
Ps -Pr
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0.54
CITY OF NEWPORT BEACH
Fire Department
Fire Prevention Division
GUIDELINES AND STANDARDS
B.01- Determination of Required Fire Flow
Pages 1 of 3
Revised: 03-04-08, 04-27-16, 07-13-16
FIRE PREVENTION DIVISION
GUIDELINE B.01 - Determination of Required Fire Flow
B.01.1 PURPOSE
The purpose of this guideline is to provide assistance to architects, builders and
engineers in determining the adequate fire flow requirements for buildings and
complexes. This guideline is in accordance with the California Fire Code, Appendix B
and Appendix C.
B.01.2 SCOPE
All buildings built within the City of Newport Beach are required to comply with the
California Fire Code Appendix B, Fire Flow Requirements for Buildings and Appendix C,
Fire Hydrant Locations and Distribution.
B.01.3 PROCEDURE
Determine the total square footage of all floor levels:
Line 1 _______________________sq. ft.
Determine the type of Construction:
Line 2 ____________________________
Using Table B105.1, determine the fire flow.
(If the building has full sprinkler system, deduct 50%)
Line 3 _______________________ gpm. 1, 2
Using Table C105.1, use the determined fire flow from line 3 to determine the required
number of fire hydrants required and their spacing:
Line 4 _______Hydrants_______ft. apart.
Existing fire hydrants on public streets within 500‘of the building are allowed to be
considered as available. The aggregate flow from existing hydrants, at no less than 20
pounds residual pressure, may be credited toward the total flow required. Existing
hydrants on adjacent property may not be considered unless the hydrant and main are
owned by a public water company or public utility and the road serving those hydrants is
of appropriate construction and width. An easement for the roadway must be recorded.
183,365
IIIA
3,000
3 400
B.01- Determination of Required Fire Flow
Pages 2 of 3
Revised: 03-04-08, 04-27-16, 07-13-16
FIRE PREVENTION DIVISION
New hydrants shall provide a minimum flow of 1250 gpm at 20 pounds residual
pressure.
1. The fire sprinkler demand is permitted to be included within this value as long as
the sprinkler demand does not exceed the minimum required fire flow.
2. The minimum fire flow shall not be less than 1500 gpm.
B.01- Determination of Required Fire Flow
Pages 3 of 3
Revised: 03-04-08, 04-27-16, 07-13-16
FIRE PREVENTION DIVISION