21-100325-Water System Hydraulic -01-29-2021-V1LAKEHAVEN UTILITY DISTRICT
Hydraulic Model Fire Flow Estimate
Request/Reporting Form
Requested By:
Brian Asbury
Date:
07/1/16
Location to be Modeled: Proposed "Preferred Freezer" Site (APN 6142600005/6142600200)
Lakehaven'/, Section Grid:
L/11
Intersection:
West of S 33901 St & Weyerhaeuser Way S
Add. Description:
See attached map; Hyd #3
Pressure Zone: 538
Results By:
John Bowman._
Date:
7/19/16
Model Run No.:
Master Water System Model 2007.net
FF #324
Condition
Pressure (psi)
Flow (gpm)
Static
40
oil
Fire Flow
20
4100
NOTES:
Lakehaven's adopted level of service goals for fire flow rates are 1000 gpm within single
family residential areas (including duplexes) and 2500 gpm for multi -family, commercial,
and industrial areas.
Model results depict the theoretical performance of the water system under high demand
conditions and are not guaranteed to represent actual system performance. A design
professional should be consulted for site specific design purposes.
The calculated fire flow capacity in the above table is based on a currently available residual
system pressure of 20 psi at the location modeled and with a proposed new 12" diameter
pipe loop. An 8" diameter pipe loop exceeded Lakehaven's standard maximum allowable
velocity of 8 ftls for new pipe at a fire flow rate above 2100 gpm.
071916FF 324 - Preferred Freezer (Form Rev. 12/6/13)
(NOTE: Lalcehaven Utility District
neither warrants nor guarantees the
accuracy of any facility Information
provided, Facility locations and
conditlons are subject to field
verlflea( Ion.
PREFERRED FREEZER / ORCA EAY
16.102265-00-UP
0 300
Feet
.tr
5/13/2016 BIA