17-105489-Parking Analysis-11-12-2021-V2 TENW
Transportation Engineering NorthWest
Transportation Planning | Design | Traffic Impact & Operations
11400 SE 8th Street, Suite 200, Bellevue, WA 98004 | Office (425) 889-6747
MEMORANDUM
DATE: September 1, 2021
TO: Sarady Long
City of Federal Way
FROM: Jeff Schramm / Curtis Chin, P.E.
TENW
SUBJECT: Updated Parking Analysis for the
Woodbridge Business Park – Federal Way, WA
TENW Project No. 5219
This memorandum documents the updated parking analysis for the proposed Woodbridge Business Park
project located on the former Weyerhaeuser Campus site for the purpose of documenting whether or not
adequate parking would be provided.
Project Description
The proposed project includes the development of three new buildings with a total building area of 971,390
SF, and with a total parking supply of 1,776 stalls. The new buildings would be located north and south of
the existing Weyerhaeuser Tech Center (WTC) building which includes approximately 450,000 SF of
building area. As part of the proposed project, the parking provided for the WTC building would be
reconfigured. Of the 1,176 total parking stalls, 708 stalls would be allocated to the WTC building which
would be an increase over the existing parking supply of 699 stalls. The remaining 1,068 parking stalls
would be allocated to the three new buildings in the Woodbridge Business Park.
WTC Parking Assessment
According to the 1994 Weyerhaeuser Company Concomitant Pre-Annexation Zoning Agreement, the
existing WTC building is located within the Corporate Park (CP-1) Zone. Per the Section XIII A of the
concomitant agreement, „existing development and uses are deemed to comply with minimum requirements
for number of parking spaces⁄‰ Therefore, since the 708 parking stalls allocated to the WTC building
exceeds the existing parking supply, the parking provided would satisfy the parking requirement per the 1994
concomitant agreement.
Proposed Building Area Parking Demand
As of the date of this study, specific user(s) or tenant(s) have not been identified for the three new buildings
totaling 971,390 SF. For the purpose of this analysis, the ÂIndustrial ParkÊ land use category was assumed
consistent with the traffic impact analysis (TIA). To estimate the parking demand for the proposed buildings,
the Institute of Transportation Engineers (ITE) Parking Generation manual, 5th edition was used. The parking
demand rate for Industrial Park (LUC 130) is 1.20 parking spaces per 1,000 SF. As a result the peak
parking demand for the three proposed buildings totals 1,166 spaces (971,390 SF X 1.20 parking
spaces/1,000 SF).
Woodbridge Business Park – Parking Assessment
TENW September 1, 2021
Page 2
Total Parking Required
The total parking required for the Woodbridge Business Park was determined by summing the parking
required for the existing WTC building and the estimated parking demand generated by the three new
buildings proposed (971,390 SF building area) as shown in Table 1.
Table 1
Woodbridge Business Park
Parking Summary
Building
Building
Area (SF)
Parking
Demand Rate
Required Parking/
Demand
WTC (existing) 451,460 - 708
Subtotal = 451,460 - 708
1 (proposed) 605,195 1.20 726
2 (proposed) 240,675 1.20 289
3 (proposed) 125,520 1.20 151
Subtotal = 971,390 - 1,166
TOTAL = 1,422,850 - 1,874
Parking Supply Provided = 1,776
As shown in the table above, the required parking for the existing WTC and the demand for the Woodbridge
Business Park if the new development is all „Industrial Park‰ totals 1,874 vehicles which exceeds the proposed
on-site parking supply of 1,776 stalls by 98 parking stalls. This is a conservative assumption. The user of
the project has not been identified. Accordingly, no floor plan showing the exact breakdown of uses has
been prepared. Ultimately, it is likely that some or all of the square footage of the project will contain a use
requiring less parking. We recommend that the City impose a condition requiring the building permit
application plan set to include a section with a parking analysis that demonstrates compliance with the
required parking ratios. This is consistent with the CityÊs approach on other project approvals, including
Woodbridge Building B (Process III Project Approval Finding 8 and Condition of Approval 3).
cc: Eric LaBrie, ESM Consulting Engineers
Dana Ostenson, IRG
Attachment