17-105489-Parking Study-04-02-2020-V13 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: March 10, 2020
TO: Sarady Long
City of Federal Way
FROM: Jeff Schramm / Curtis Chin, P.E.
TENW
SUBJECT: Parking Analysis for the
Woodbridge Business Park – Federal Way, WA
TENW Project No. 5219
This memorandum documents the 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 1,551 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 1,551 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 843 parking stalls would
be allocated to the three new buildings.
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 ÂWarehouseÊ land use category was assumed.
To estimate the parking demand for the proposed warehouse buildings, the Institute of Transportation
Engineers (ITE) Parking Generation manual, 5th edition was used. The parking demand rate for Warehouse
(LUC 150) is 0.39 parking spaces per 1,000 SF. As a result the anticipated peak parking demand for the
three proposed buildings totals 379 spaces (971,390 SF X 0.39 parking spaces/1,000 SF)
Woodbridge Business Park – Parking Assessment
TENW March 10, 2020
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 0.39 236
2 (proposed) 240,675 0.39 94
3 (proposed) 125,520 0.39 49
Subtotal = 971,390 - 379
TOTAL = 1,422,850 - 1,339
Parking Supply Provide = 1,551
Adequate Parking Provided? YES
As shown in the table above, the required parking for the existing WTC and the anticipated demand for the
Woodbridge Business Park site totals 1,339 vehicles would be accommodated by the proposed on-site
parking supply of 1,551 stalls.
cc: Eric LaBrie, ESM Consulting Engineers
Dana Ostenson, IRG
Attachment