20-101872-Certificate of Water Availability-05-13-2020-V120-101872—Certificate of hater Availability-05-13-2020—t11
Lakehaven
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Lakehaven Water & Sewer District - Development Engineering Section
31623 - 1st Ave S * PO Box 4249 * Federal Way, WA 98063-4249
Email: DE@Lakehaven.org * Telephone: 253-945-1581 or 253-945-1580
This certificate is intended to provide the applicant, land use agencies &/or public health departments with
information necessary to evaluate development proposals. Lakehaven Water & Sewer District, at its sole
discretion, reserves the right to delay, or deny, water service based upon capacity &/or supply limitations
in Lakehaven's or Other Purveyor's system facilities.
Proposed Land Use: ® Building Permit-SFR (1) ❑ Building Permit-MFR () ❑ Building Permit -Other
❑ Subdivision () ❑ Short Subdivision () ❑ Binding Site Plan
❑ Boundary Line Adjustment ❑ Other (specify/describe)
Tax Parcel Number(s): 6143600450 Site Address: 36XX S 334th St LWSD GIS Grid: M-10
Ex. Bldg. Area to Remain: N/A sf New Bldg. Area Proposed: 4,577 sf
WATER SYSTEM INFORMATION
1. ® Water service can be provided by service connection to an existing 12" diameter water main that is approximately 15+ -
feet from the site.
2. ❑ Water service for the site will require an improvement to LWSD's water distribution system of:
❑ a. feet of " diameter water main to reach the site; and/or
❑ b. The construction of a water distribution system on the site; and/or
❑ c. A major portion of LWSD's comprehensive water system plan would need to be implemented and/or
constructed; and/or
❑ d. Other (describe):
3. ® a. The existing water system is in conformance with LWSD's Comprehensive Water System Plan.
❑ b. The existing water system is not in conformance with LWSD's Comprehensive Water System Plan and an
Amendment to this Plan will be required. This may cause a delay in issuance of land use approvals or permits.
4. ® a. The subject property is within the corporate limits of Lakehaven Water & Sewer District, or has been granted
Boundary Review Board approval for extension of water service outside of LWSD's water service area.
❑ b. Annexation or Boundary Review Board approval will be necessary to provide service.
S. Water service is subject to:
® a. Payment of connection charges (to be determined by LWSD;
❑ b. Proof or reservation of easement(s) as required by LWSD;
® c. Other: LWSD Service Connection Application required.
Comments/special conditions: Care shall be taken to avoid encroachment upon existing private sewer and/or water lines, and/or
associated easement (KCAF 20140304000220), on the site.
The nearest fire hydrant is approximately 190+ - feet from the Property (as marked on map on the back of this page).
System hydraulic model results (FF #90.1, copy attached), at no less than 20 psi, indicate that LWSD's standard maximum allowable
liquid velocity of 10 ft/s is exceeded at a fire flow rate above 4,200 GPM for two (2) hours or more. This flow figure depicts the
theoretical performance of the water distribution system under high demand conditions. Fire flow rates greater than this may be
accommodated through water distribution system improvements, contact LWSD for additional information.
578 Pressure Zone Est. Meter Elevation(s)-GIS: 407+/- Est. Pressure Range at Meter(s) (psi): 71-80
I hereby certify that the above water system information is true. This certification shall be valid for one (1) year from the date of
signature.
Name: BRIAN ASBURY Title: DEVELOPMENT ENGINEERING SUPERVISOR
Signature: xvicta a6#y a-6il Pd )
Date: 5 f 12/2U2U
6143600450 wtr swr.docx (Form Update 3/13/20) Page 1 of 4
6143600450 wtr swr.docx (Form Update 3/13/20) Page 2 of 4
IPA 01 Me IE
Hydraulic Model Fire Flow Estimate
Request/Reporting Form
Requested By: Date:
KRB 11/3/1998
Location to be Modeled: S 334th St & 38th Ave S
Lakehaven'/4 Section Grid:
M-1 O
intersection:
S 334th St & 38th Ave S
Add. Description:
See attached map
Pressure Zone: 578
Results By:
JCB (form update by BIA)
Date:
11/9/1998 (3/28/2013)
Model Run No.:
Master Water System Model 2007.net
FF #90.1
Condition
Pressure (psi)
Flow (gpm)
Static
79
0
Fire Flow
20
5500
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 ft/s is exceeded at a fire flow rate above 4200
gpm. Fire flow capacities greater than 4200 gpm may be accommodated through water
system improvements.
Form Rev. 5/30/08
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