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Treasure Island Bridge


Treasure Island Bridge

View from East

Photo taken by K. A. Erickson in May 2011


BH Photo #199400


A brief history of Treasure Island and it's bridge 

Written by K. A. Erickson

Treasure Island is one of several private island communities in the South Puget Sound area that are either accessible by a bridge or ferry that are owned through their island improvement clubs. The maintenance for such comes through annual dues. Currently the Treasure Island Community Club is looking for contractors to build them a new concrete bridge by the end of 2012. A tentative name for it is the Dan Doyle Bridge. The current bridge is a timber stringer a style popular many years ago but out of favour largely due to creosote. In fact Washington State is in the process of removing all timber bridges purely for environmental reasons. Treasure Island's bridge was built in 1953 when the island was first platted by timber company Pope and Talbot. The original wooden deck made way for a concrete one in 1974. An interesting note when the deck was replaced a number of people expressed interest in building a causeway out to the island instead. Treasure Island appears on some maps as Reach Island. Stretch Island, also private, lies to the South. It is sometimes a stretch or reach to get to those islands even with a minus tide that sometimes exposes the entire section now crossed by bridges.


Timber stringer bridge over Case Inlet on Treasure Island Rd
Mason County, Washington
Replaced by a new bridge
Built 1953, rehabilitated 1974, replaced 2012
Timber stringer
Total length: 789.0 ft.
Also called
Reach Island Bridge
Approximate latitude, longitude
+47.34128, -122.82801   (decimal degrees)
47°20'29" N, 122°49'41" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/512991/5243104 (zone/easting/northing)
Quadrangle map:
Inventory number
BH 48802 (Bridgehunter.com ID)

Update Log 

  • May 20, 2011: Essay added by K. A. Erickson


  • K. A. Erickson


Treasure Island Bridge
Posted October 4, 2016, by Iris (Ziller)

Happened upon this site purely by chance, when looking for our latitude and longitude. Quite a pleasant surprise. I've only been a resident/owner since 1997, so a historian I'm not. But, I've always understood that the names for Stretch and Reach Islands were taken from sailing terminology. The reach being a 'point of sail'. However, Stretch Island was named by the Wilkes Expedition in 1841 for crew member Samuel Stretch. Reach Island's original name was Oak Island. A huge--no gigantic, beautiful oak was removed from the south end of the island after I became a resident. I still miss it and wonder why it was taken down. Possibly it was thriving on the Island's 50-year old water system. Thanks for including our bridge on your site. Nice picture.