Agate Pass Bridge

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Agate Pass Bridge
Agate pass1.jpg
Coordinates47°42′45″N 122°33′58″W / 47.7124°N 122.566°W / 47.7124; -122.566
Carries SR 305
CrossesAgate Pass
LocaleSuquamish, Washington
Heritage statusNRHP
DesignSteel cantilever truss
Total length1,229 feet (375 m)
Longest span300 feet (91 m)
Clearance below75 feet (23 m)
Construction end1950
Construction cost$1,351,363
Tolluntil October 1, 1951
Agate Pass Bridge
Agate pass2.jpg
LocationWA 305 over Agate Passage
Nearest citySuquamish, Washington
ArchitectState Dept of Hwys
MPSBridges of Washington State MPS
NRHP reference No.95000625
Added to NRHPMay 24, 1995

The Agate Pass Bridge is a structural steel truss cantilever bridge spanning Agate Pass, connecting Bainbridge Island to the Kitsap Peninsula. It was built in 1950, and it replaced a car ferry service which dated from the 1920s.[citation needed] The bridge provides a direct route along Washington State Route 305 between Seattle, via the Seattle-Bainbridge Island ferry, and the Kitsap Peninsula.

The Agate Pass Bridge is 1,229 feet (375 m) long and is 75 feet (23 m) above the water and has a channel clearance of 300 feet (91 m) between piers.[1]

The original construction cost $1,351,363 of was paid out of the motor vehicle fund, and operated as a toll bridge from October 7, 1950, until October 1, 1951, when costs were repaid by a bond issue passed by the Washington State Legislature. The Washington Toll Bridge Authority managed the bridge during the year it took to repay the bond.[2]

The Agate Pass Bridge is listed on the National Register of Historic Places.


  1. ^ Paula Becker. "Agate Pass Bridge connecting the north end of Bainbridge Island to mainland Kitsap County opens on October 7, 1950". THE FREE ENCYCLOPEDIA OF WASHINGTON STATE HISTORY. Retrieved December 18, 2017.
  2. ^ JOHN J. O'CONNELL, DOUGLAS HARTWICH. "HIGHWAYS ‑- IMPROPER EXPENDITURE OF HIGHWAY FUNDS". Washington State: Office of the Attorney General. Retrieved December 18, 2017.

Coordinates: 47°42′45″N 122°33′57″W / 47.71237°N 122.56591°W / 47.71237; -122.56591