HomeMy WebLinkAboutCM_Construction_Mitigation_Desc_220131_v1.pdf
4815 Center Street
Tacoma, WA 98409-2319
(253) 474-9449 / sittshill.com
Brent K. Leslie, P.E., S.E.
Kathy A. Hargrave, P.E.
Larry G. Lindell, P.E., S.E.
Michael A. McEvilly, P.L.S.
Andrew J. Boileau, P.E., S.E.
David C. Boileau, AIA
Civil | Structural | Survey
January 31, 2022
BROTHERTON CADILLAC
215 SW 12th Street
Renton, Washington 98057
TO: Mr. Brad Brotherton
SUBJECT: CONSTRUCTION MITIGATION DESCRIPTION
BROTHERTON CADILLAC NEW BUILDING & BUICK-GMC SERVICE ADDITION
Dear Brad,
This letter is being written to satisfy the requirement for a Construction Mitigation Description for the
proposed construction of your new Cadillac dealership building, and the addition to your existing Buick-
GMC dealership building.
At this time, we anticipate construction will begin in the summer of 2022 and conclude by year’s end.
The proposed hours of operation for construction of the new building and building addition are 6am
through 4pm, Monday through Friday. These start and finish times are earlier than typical business
hours, and are intended to minimize traffic and transportation impacts.
Proposed hauling/transportation routes for vehicles accessing the new Cadillac dealership site will be
limited to a designated construction entrance off of SW 12th Street, until such time that the site work is
complete; all disturbed surfaces are stabilized; and the owner, engineer, and City inspector provide
written acceptance. For continuation of work within the building, it is expected that the permanent SW
12th Street driveway approach will be used for construction access. For the Buick-GMC construction,
access shall be provided via the existing paved driveway approach to SW 12th Street throughout the
duration of construction.
The construction plans for each project site will identify temporary erosion and sedimentation control
devices to be installed prior to construction, and maintained until the site is accepted by the owner,
engineer, and City inspector. These measures will minimize the migration of sediment into private or
public storm drainage systems. Also, the contractor shall be required to sweep as necessary to prevent
tracking sediment onto the public streets. The plans will also require a temporary traffic control plan
for all work abutting SW 12th Street and Maple Avenue SW, for installation of curb/gutter and sidewalk.
Please feel free to contact our office with any additional questions or comments regarding this project.
Sincerely,
Don Davis, P.E.
Senior Project Engineer
O:\19400\19480\Permits and Applications\~Master Document List\CM_Construction_Mitigation_Desc_220131_v1.docx