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Memorandum
To: City of Renton
From: John Davies KPG Psomas
Date: 4/1/2022
Re: Interim Maintenance Facility – Transportation Impact Scoping Analysis
Project No: 20094
King County is proposing a change of use to the building (Farwest Steel) located at 201 SW 34th
Street in the City of Renton. The County is proposing to use the facility as an interim vehicle
maintenance and parts storage facility.
The following sections provide a brief description of the proposed project, an estimate of the
project’s vehicular trip generation and a discussion of the probable impacts and applicable City
requirements.
Project Description
The site is located along SW 34th Street, between Lind Avenue SW and E Valley Road. The site also
connects to Lind Avenue SW from the southwest corner of the parcel.
The proposed project will reuse the existing 96,938 square foot (sf) steel warehouse/fabrication
plant, 2,160 sf locker/break building and 2,096 sf office buildings to provide a temporary vehicle
maintenance and parts storage facility for the King County Solid Waste Division (KCSWD). Two
additional portable modular buildings totaling 1,440 sf will be brought onto the site for additional
office space. As proposed, approximately one-half of the building’s interior will be devoted to
vehicle circulation to allow vehicles to maneuver into and out of the maintenance bays and to
provide access to vehicle stores.
As designed, trucks movements will primarily enter and exit using the SW 34th Street driveway.
Trucks will be able to turn around within the warehouse to exit the building on the northeast
corner. A second entrance will be used on the south side of the building. A loading dock is located
on the east side of the building. Other vehicles may use either the SW 34th Street driveway or use
the access road to access directly to Lind Avenue SW.
The County will retain existing parking areas and will meet required parking requirements as per
Renton Municipal Code (RMC) 4-4-080.
A site plan is attached to this memorandum.
EXHIBIT 14
RECEIVED
Clark Close 04/20/2022
PLANNING DIVISION
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Project Trip Generation
Farwest Steel operated the building until approximately March 2021, when King County took over
as the leaseholder. The Institute of Transportation Engineers (ITE) Trip Generation (11th Edition)
and data from King County Solid Waste were used to estimate the expected trip generation for
each land use for the facility.
Prior Use
The trips generation for the previous use (Farwest Steel) was based on ITE Trip Generation
estimates for Warehousing (150) and Office (712) land uses. Table 1 summarizes the AM and PM
peak hours for adjacent street traffic and the daily trip generation rates based on the square
footage.
Table 1. Trip Generation Summary for Previous Land Use
Land Use Square Footage AM Peak Hour PM Peak Hour Daily
Warehouse (150) 96,938 16 17 191
Office/Break
(712) 4,256 7 9 61
Total 101,194 23 26 252
ITE Trip Generation 11th Edition, Land Uses 150 and 712.
Proposed Use
The County is proposing two primary uses of the site: warehouse/storage and maintenance
facility. According to the site plan, approximately two-thirds of the main building square footage
would be for the warehouse storage function and one-third of the main building square footage
would be devoted to vehicle maintenance. The office/break area will continue to be used in that
function.
King County provided information regarding the number of expected employees working for each
function.
Warehouse Facility
Based on information obtained by the County, there will be a weekday average of 6 employees per
day split between a day shift and a swing shift. The facility will operate Monday-Friday from 6:00
AM to 9:00 PM and on Saturdays and Sundays between 6:00 AM to 4:30 PM. There are 4-8
deliveries anticipated per day.
Maintenance Facility
Approximately 4-5 vehicles are expected to arrive for scheduled maintenance each day.
Additionally, there may be unscheduled KCSWD vehicles requiring on-site services. These include
bays for mechanics, tire and lube and a welding all located in the southern portion of the building.
The hours of operation will be 6:30 AM to 11:00 PM with 2 shifts. A total of 28 employees will
work during on weekdays split between two shifts. Fourteen (14) employees will workday shift
from 6:00 AM to 2:30 PM and thirteen (13) employees the swing shift 2:30 PM to 11:00 PM. One
maintenance scheduler will also work during the daytime hours.
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Proposed Use
A combination square footage and employee data were used to estimate the trip generation for
the proposed Interim Maintenance Facility. The highest employee shift was used to estimate the
trip generation. Office uses were based on building gross square footage.
Table 2. Trip Generation Summary for the Proposed Use
Land Use Units AM Peak Hour PM Peak Hour Daily
Warehouse (150) 3 employees 6 2 43
Existing
Office/Break
(712)
4,256 gsf 7 9 61
Vehicle
Maintenance
(942)
14 employees 11 15 15
New Office (712) 1,440 gsf 2 3 21
Total 26 29 201
ITE Trip Generation 11th Edition.
Estimate of Net New Trips
Table 3 summarizes the AM peak hour, PM peak hour and daily trips anticipated to the site. The
proposed project will generate 3 new trips during both the AM and PM peak hours and 51 fewer
daily trips than the previous land use (Farwest Steel).
Table 3. Net New Trips
Land Use AM Peak Hour PM Peak Hour Daily
Existing Use 23 26 252
Proposed Use 26 29 201
Net New Trips +3 +3 -51
Renton Requirement
There are three sections of the Renton Municipal Code (RMC) that apply to the transportation
analysis of the project:
RMC 4-9-070 Environmental Review Procedures, Part G. Categorical Exemptions: Part 1c. Local
Modifications. The project will add 1,400 gross square feet of office space, less than the 4,000 gsf
of office, commercial, or service building threshold and therefore, it is considered categorically
exempt under SEPA and does not trigger the need for a TIA.
RMC 4-6-070 Transportation Concurrency Requirements: Part C. Applicability and Exemptions.
The project is not subject to transportation concurrency requirements due to the project’s
categorical exemption.
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RMC 4-1-190 Impact Fees, Part G. Collection of Impact Fees. The project is subject to
Transportation Impact Fees based upon the City’s current Impact Fee Rate Table.
Conclusions
This analysis documents the proposed change of use and function for the KCSWD interim
maintenance facility. Activities of the proposed project will occur within the existing building
footprint and a new 1,440 square foot temporary office space building. The analysis finds that the
project is not anticipated to generate significant traffic impacts to area roadways and
intersections. The ITE Trip Generation analysis indicates that there will be 51 fewer daily trips and
small increases of 3 net new AM peak hour and 3 net new PM peak hour trips with the proposed
project.
Based on the review of the RMC requirements, the proposed project is categorically exempt from
SEPA review. Therefore, the project does not require a TIA and it is not subject to transportation
concurrency requirements. The project is expected to be required to pay City Transportation
Impact Fees. No other mitigation is required.
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