HomeMy WebLinkAboutPN_Project_Narrative_20170526_v11
Clark Close
From:Cooley, Linda <CooleyL@wsdot.wa.gov>
Sent:Thursday, May 11, 2017 10:48 AM
To:Clark Close
Cc:Vicki Grover
Subject:PLEASE PROCESS-Geotechnical Boring exemption request
Attachments:Critical Areas Exemption.pdf; Boring layout_sens areas.pdf
Dear Clark,
Please process an Critical Area Exemption to allow WSDOT to conduct geotechnical investigations within City of Renton
critical areas. I have attached a completed Critical Areas Exemption application and a plan sheet showing the proposed
boring locations. The holes are approximately 4” diameter.
There are five locations, see attached plan sheet/map that lie within City owned properties, including:
R2B-23vw-17 and RB-21-17 are located within May Creek Buffer zone. To minimize disturbance to the stream buffer, the
crew will access the location through WSDOT roadway right of way. Woody plants in the stream buffer will not be
disturbed. Disturbed soil/mulch will be stabilized with new mulch or straw after drilling work is complete.
Borings RB-22, RB-24 and RB-S27 are located in the wetland east of I-405. Access will be on foot with portable drilling
equipment. Live woody vegetation will not be damaged. Some dead fallen wood and blackberry vines will need to be
cleared to gain access. Bare soil remaining after the drilling will be covered with straw mulch to prevent erosion.
Thank you. Please let me know if you need any further information to process this request.
Sincerely,
Linda Cooley
Environmental Permit/Compliance Lead
WSDOT NWR Design Build Office
425-456-8586
206-769-7481