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King County Road Services - Capital Improvement Program

Berrydale Overcrossing #3086OX

Project No.:  1116545
Project limits:  Kent Black-Diamond Rd over BNSF Rails
Project type:  Bridge
Thomas Bros. Map No.:  747a1

Project description

The Berrydale Overcrossing project will remove and replace the existing substandard bridge, and address the substandard sight distances.

Why is King County doing this project?

The bridge is very narrow with high speed traffic and high average daily traffic. The bridge has poor geometrics and a low sufficiency rating which cause it to rank high in the county's bridge replacement priority system. The approach roadway vertical alignment has substandard sight distance.

Project management phase:  Project On-Hold

Status as of December 17, 2014

Design start programmed for 2015.

Environmental information

This project is early in pre-design; potential environmental benefits will be identified during the design phase. However, this project could provide some environmental benefits, such as enhancement of existing wetlands that are now degraded by encroachment from private developments, and replacement of the existing box culvert that carries Jenkins Creek beneath the Kent-Black Diamond Road, thereby eliminating a drop from the outlet of the culvert to the stream level.

See also

Environmental compliance for bridge activities External link graphic
King County Annual Bridge Report
Overlegal truck permit
Road closures
Road standards
Roads' future - learn what's needed to preserve our road network
Seattle bridges External link graphic
Title VI information
WSDOT Historic Bridges External link graphic

How does the CIP work?

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. We have a glossary to help explain our terms and jargon.

Budget and Funding

Vicinity map

Vacinity map

Project supervisor

Larry Jaramillo