23-103808-HydraulicFireFlow92523Lakehaven
WATER & SEWER DISTRICT
Hydraulic Model Fire Flow Estimate
Request/Reporting Form
Requested By:
Charles Henry
Date:
7/21/23
Location to be Modeled: Existing Hydrant —Near PN 0821049139
LAchaven''A Section Grid:
J_7
Intersection:
S 308'h St & 14th Ave S
Add. Description:
See attached map
Pressure Zone: 578
Results By:
Date:
Model Run No.:
John Bowma L
7/21/23
Master Water System Model 2007.net
FF #442
Condition
Pressure (psi)
Flow (gpm)
Static
45
0
Fire Flow
20
10,300
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,
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. The model indicates that Lakehaven's
standard maximum allowable velocity of 10 f 1s is exceeded at a fire flow rate above 5100
gpm. Fire flow capacities greater than 5100 gpm may be accommodated through water
system improvements.
072123FF 442 - PN O821049139 (Form Update 1/6/17)
J7/47
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1
3J7/32
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1
1 I
1
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1
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1
I
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1
1
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1
J7/6
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S 308TH LN -
J7/30