Modifications costing over US$19M have been proposed for the Success dam in California’s Tulare County.
The proposed work includes raising the spillway crest by 3m, lengthening the spillway by 50m, and increasing the flood control and water conservation storage space of Lake Success by one-third.
The modifications will increase the level of flood protection from one in 47 years to one in 100 years for the city of Porterville; improve flood protection for downstream agricultural crop lands along the Tule river and in the Tule lake area; and increase the dependability of irrigation water supply.
The project is sponsored by the US Army Corps of Engineers, who built and currently operates the Success dam. California’s share of the project cost is 92.45%.
Subject to funding availability, the flood control/water supply project will commence in May 2001 and finish by December 2002.