Folsom Dam Auxiliary Spillway, Phase IVGeolocation: 0, 0

The $900 million Folsom Dam Auxiliary Spillway Project is a cooperative effort between the US Army Corps of Engineers and the US Department of the Interior, Bureau of Reclamation to help the Sacramento region improve its ability to withstand and manage large flood events by constructing a new spillway for the historic Folsom Dam. The project involves the fourth and final phase of spillway construction which includes a temporary coffer dam, concrete work for the 1 mile chute and energy dissipation blocks and stilling basin, and installation of instrumentation and controls.

Neil O. Anderson & Assoc., now part of Terracon is currently installing all of the geotechnical instrumentation and Automated Data Acquisition System (ADAS) including piezometers, inclinometers, and dynamic pressure transducers. Hard rock coring on a sloped surface was required to install instruments on the spillway channel. Innovative use of dynamic sensors will monitor water flow and turbulence during peak flows.

Folsom, CA



Associated Office

ConcordGeolocation: 38.0191, -122.0318
In addition to our core service lines of environmental, geotechnical, and materials, the Concord office is the “center of excellence” for providing aquatic design and swimming pool engineering services for public and privately funded projects throughout the United States. RI joined Terracon in December of 2014. RI has been a proven leader in aquatic design and engineering for more than 40 years, and has designed more than 600 commercial swimming facilities for numerous publicly funded and private entities. The combination of experience from these key acquisitions has…