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King County Road Services - Map and Records Center

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Map Vault
Map Vault 		Map Counter
Map Counter 		 Research resources
Research resources 

About the Map and Records Center

The King County Map and Records Center is a repository for documents associated with the establishment and construction of roads in unincorporated King County for the King County Road Services Division.

Our records collection includes design and construction project files, correspondence, contracts, agreements, safety studies, field books and technical reports. We also keep a collection of engineering drawings for road projects, topographic maps, Engineers’ maps, plat maps, section breakdowns and road establishment documents.

The Map Counter at the King County Map and Records Center is open Monday – Friday from 8 a.m. to 4:30 p.m., except on King County government holidays. We're located in the King Street Center Building in historic Pioneer Square in downtown Seattle. View our contact information and driving directions.

Download a copy of our Map and Records Center brochure to learn more about what we do and who we are. (3MB .pdf)

Contact us

King County Road Services Division
Map and Records Center
KSC-TR-0106
201 South Jackson St., 1st Floor
Seattle, WA 98104-3856
206-296-6548
Fax: 206-205-7350
E-mail: map.roads@kingcounty.gov

Information from the Road Services Division's website is available to people with disabilities in alternate formats upon request by calling 206-263-6482 or 711 for the TTY relay service.

External link = External link

Related topics

Map Vault treasures

South Park Bridge
The original South Park Bridge (Bridge #982A) spanning the new Duwamish River Commercial Waterway along 14th Avenue South was built in 1914.

In 1931 the bridge was replaced with a Scherzer Rolling Lift (Bridge #3179) crossing the waterway at a new location still along 14th Ave S but angled to reach 16th Avenue South. In this 1919 map with 1931 revisions the two bridges appear side by side. The bridge was funded by bonds that were approved by vote in 1928 to cover the right-of-way, engineering, construction, and other costs.

Through the decades, the bridge was subject to numerous maintenance and improvement projects including repairs following the Nisqually earthquake.

To see the engineer designs associated with these projects, simply enter "3179" in the Project/Map Name field of the Road Map Vault.

The South Park Bridge was permanently closed on June 30, 2010. The problems with the bridge's structure were so extensive that there were no feasible repair options. On Oct. 15, 2010, King County learned that it had secured a $34 million TIGER II grant that completed the County's efforts to secure funding for new South Park Bridge. On March 8, 2011, Kiewit-Massman was named the apparent low bidder to construct the new bridge. Construction started in May 2011 and is scheduled to finish by the end of 2013. To learn more please visit the South Park Bridge website.