HomeMy WebLinkAboutRS_Segale_Utility_Review_Memorandum_250601_v1AKS ENGINEERING & FORESTRY, LLC
405 CORPORATE CENTER, BUILDING W
11321-B NE 120TH STREET
KIRKLAND, WA 98034
(425) 285-2390
WWW.AKS-ENG.COM
Date: June 1, 2026
To: Mike Pruett
Segale Properties
5811 Segale Park Drive C
Tukwila, WA 98188
From: Jamie Schroeder
AKS Engineering & Forestry, LLLC
11321-B NE 120th Street,
Kirkland, WA 98034
Project Name: Upper Balch
AKS Job No.: 14602
Project Site: 301 Monroe Avenue NE, Renton, Washington 98056
Subject: Utility Review Memorandum
This memorandum is provided as part of the utilities review for the Upper Balch Renton parcel (APN 1623059059)
based on the conceptual site plan prepared by AKS Engineering in May 2026. This concept is based on a rezone
from the current R-10 zoning in the City of Renton to a proposed zoning of R-14 for the 14.42+/- acre project site.
The northern portion of the site was developed as a regional stormwater facility as part of the City’s Project No.
SWP-27-4080. Below is a general summary of anticipated utility services for the development.
Water
The project is within the City of Renton’s water service area in the Highlands 565 Pressure Zone, and the static
water pressure is approximately 98 psi at ground elevation of 338-feet. There is an existing 16-inch City water
main located in Monroe Ave NE on eastern frontage of the property that can deliver a maximum capacity of 5500
gallons per minute per City correspondence – (see Water Plan No. W-045801). There is an existing 1-inch water
meter on the south end of the property. It is anticipated that on-site water improvements will be extended on-
site to serve for fire and domestic water supply to the new single-family development. The existing main within
Monroe Ave NE has adequate capacity based on prior pre-application notes from the City of Renton.
Sanitary Sewer
The site is within the City of Renton’s sewer service area. There is an existing 12-inch sanitary sewer main located
in Monroe Ave NE (see City Plan No. S-151002). New 8-inch sanitary sewer main and manholes will be required
to be extended on-site to serve the proposed development. It is understood that the project will be subject to
East Renton Interceptor SAD fee, and the development is subject to applicable sewer system development charges
based on the size of the new domestic water to serve the project.
Utility Review Memorandum June 1, 2026
Page 2 of 2
Storm Drainage
The site falls within the Flow Control Duration Standard area which matches forested site conditions and is within
the Lower Cedar Drainage basin. There is an existing 36-inch stormwater main located in Monroe Ave NE, east of
the property, which flows into the north side of the site through another 36-inch stormwater main. The 36-inch
stormwater line connects to existing water quality treatment and infiltration facilities in the northern portion of
the site. The existing infiltration and treatment facilities were constructed in 2025 with City Project No. SWP-27-
4080. After reviewing the design, it appears that the existing storm facilities were designed assuming 40%
impervious coverage for the site, or 5.78 acres of impervious. The conceptual site plan was measured to be
approximately 46% impervious, or 6.64 AC of impervious area due to the increased density allowed by a potential
rezone. In addition, it should be noted that the current proposed unit count could be increased slightly which
would also increase the impervious coverage slightly.
The existing storm facilities located on-site were sized for future build out of the site assuming R-10 zoning and
storm runoff could be conveyed directly to the existing facilities. However, it is anticipated that the increased
0.86 AC of impervious area would require an additional on-site facility for flow control and water quality treatment
unless other considerations were made by the City.
Sincerely,
AKS ENGINEERING & FORESTRY, LLC
Jamie Schroeder, PE | Principal
11321-B NE 120th Street, Kirkland, WA 98034
(425) 285-2390 | jamie.schroeder@aks-eng.com