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Road Services Division Capital Improvement Program (CIP)

212th Avenue SE Flood Risk Reduction Project

Project No.:  1127590
Project limits:  212th Avenue SE at SE 384th Street
Project type:  Flood/Storm
Thomas Bros. Map No.:  777G5

Project description

To install an underground overflow conveyance system on 212th Avenue SE, at SE 384th Street about two and a half miles southwest of Black Diamond, to alleviate routine flooding.

Why is King County doing this project?

Between SE 384th Street and SE 388th Street, the road bisects a ponded, Category 2 wetland. It also intersects with two agricultural drainage ditches. These drainage ditches are hydraulically connected to Newaukum Creek, a tributary to the Green River. During rain events, about 1,100 linear feet of the south bound lane of 212th Avenue SE becomes flooded and is subsequently closed as a result of clogged ditches and the road’s close proximity to the ponded wetland.

Project management phase:  Construction Completed

Status as of June 12, 2019

Construction completed. Will install mitigation plantings this fall/winter.


See also

Title VI information

Adopted Capital Improvement Program & program overview

The Road Services Division Capital Improvement Program (CIP) contains all design and construction and studies for improvements on roads, bridges or transportation facilities in the unincorporated areas of King County.

Vicinity map

Vacinity map