Canyon Lake History: Treasure Island bridge

Corona Land Company President Dino Serafini, left, and Secretary-Treasurer John Tumminia check on the progress of the Treasure Island bridge. This photo was featured in the November 1970 issue of the Canyon Lake News.

By October 1970, about two years after the development of Canyon Lake started, the Treasure Island bridge linking the island to the mainland was nearing completion. The piers had been poured and the forming for the abutments and concrete beams were in place. The bridge was expected to be completed in December 1970.

The bridge was built at a cost of $75,000, according to Dino Serafini, then president of the Corona Land Company, the developer of Canyon Lake. The bridge was designed by Johnson and Neilson Structural Engineering Company of Riverside and constructed by Penhall Marine Company of Newport Beach.

The two-lane bridge is 24-feet wide and spans 120-feet from abutment to abutment, with an elevation of the bridge bed 13.97 1/2 feet.

The Treasure Island bridge was the first bridge ever built in a private family recreation resort in California, according to the Corona Land Company.

Treasure Island is a gated island within the community of Canyon Lake. It features 36 condominiums and a private boat dock for Treasure Island owners. The Corona Land Company sold seven of the condominiums during construction. A 1975 advertisement listed the starting price of $63,000 for a two-bedroom, two full bath condominium. 

This 1971 photo shows the functional new $75,000 Treasure Island bridge that connects the island to the mainland. Photo by Canyon Lake News.
2014 photo of the bridge. Photo by Canyon Lake Insider.
Treasure Island is a gated island within the community of Canyon Lake. Photo by Canyon Lake Insider.
The bridge connects Treasure Island to Longhorn Drive. Photo by Canyon Lake Insider.

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