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.
