21-105280_05 Certificate of Water Availability_12-17-2021-V1RECEIVED
1/3/22
CITV OF FEDERAL MAY
COMMUNITY DEVELOPMENT
Lakehaven
WATER & SEWER DISTRICT
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 () ❑ Building Permit-MFR () ❑ Building Permit -Other
❑ Subdivision () ❑ Short Subdivision () ❑ Binding Site Plan
❑ Boundary Line Adjustment ® Other (specify/describe) Land Use - Process III
Tax Parcel Number(s): 7622400015 Site Address: 17XX S 320th St LWSD GIS Grid: K-09
Ex. Bldg. Area to Remain: UNKNOWN sf New Bldg. Area Proposed: UNKNOWN sf
WATER SYSTEM INFORMATION
1. ® Water service can be provided by service connections to an existing 12" diameter water mains that are on the site.
2. ® If additional/new fire hydrant(s) required, 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): LWSD Developer Extension (DE) Agreement required.
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, for any new/modified service connections);
❑ b. Proof or reservation of easement(s) as required by LWSD;
® c. Other: LWSD Service Connection Application required, for any new/modified service connections.
Comments/special conditions: Care shall be taken to avoid encroachment upon existing LWSD water and/or sewer mains, and/or
associated easement(s), on the site.
The nearest fire hydrants are on the Property (as shown on map on the back of this page).
System hydraulic model results (FF #170, 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 3,500 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.
538 Pressure Zone Est. Meter Elevation(s)-GIS: High 418+/-, Low 410+/- Est. Pressure Range at Meter(s) (psi): 43-55
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: BALL= Qi3 (e-6j .r m) Date: IU/1/20C
CONDITIONS UN -CHANGED
53W (6 (e-signed), 11/10/21
7622400015 wtr swr.docx (Form Update 3/13/20) Page 1 of 4
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NOTE: Lakehaven Water and Sewer' Water Certificate of Availability A
District neither warrants nor guarantees
the accuracy of any facility information Parcel 7622400015
provided Facility locations and conditions
are subject tofield verification. 10:'1'2020 BIrI I
7622400015 wtr swr.docx (Form Update 3/13/20) Page 2 of 4
tax 1
Request/Reporting Form
Requested By:
BIA
Date:
2/26/2003
Location to be Modeled: Western portion of SeaTac Mall
Lakehaven'/4 Section Grid:
,-09
Intersection:
S 321st St & Pacific Hwy S
Add. Description:
See attached map
Pressure Zone: 538
Results By:
Jolul Bowman
Date:
3/6/2003 (form update
9/7/2011 by BIA)
Model Run No.:
Master Water System Model 2007.net
FF 9170.1
Condition
Pressure (psi)
Flow (gpm)
Static
46
0
Fire Flow
20
7700
Results By:
John Bowman
Date:
3/6/2003 (form update
9/7/2011 by BIA)
Model Ruu No.:
Master Water System Model 2007.net
FF #17092
Condition
Pressure (psi)
Flow (gpm)
Static
46
0
Fire Flow
20
8700
Results By:
John Bowman
Date:
3/6/2003 (form update
9/7/2011 by BIA)
Model Run No.:
Master Water System Model 2007.net
FF #170.3
Condition
Pressure (psi)
Flow (gpm)
Static
46
0
Fire Flow
20
11000
Form Rev. 5/30/08
Results By:
John Bowman
Date:
3/6/2003 (form update
9/7/2011 by BIA)
Model Run No.:
Master Water System Model 2007.net
FF #170.4
Condition
Pressure (psi)
Flow (gpm)
Static
46
0
Fire Flow
20
12500
Results By:
John Bowman
Date:
3/6/2003 (form update
9/7/2011 by BIA)
Model Run No.:
Master Water System Model 2007.net
FF #170.5
Condition
Pressure (psi)
Flow (gpm)
Static
46
0
Fire Flow
20
4100
NOTES:
The above fire flow analyses were performed at five (5) existing hydrants surrounding the
west portion of SeaTac Mall (see attached map).
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 cur7ently 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 3500
gpm. Fire flow capacities greater than 3500 gpm may be accommodated through water
system improvements.
Form Rev. 5/30/08