(left to right) Penny Lew, PE, OCPW and past president ASCE OC; OCWD Assistant Director
of Engineering Chris Olsen, PE; and Tapas Dutta, PE, ENV SP, QSD, Harris & Associates
and past president ASCE OC.
The American Society of Civil Engineers Orange County, California Branch (ASCE OC)
honored the Orange County Water District's (OCWD; the District) Burris Pump
Station Project, Phase 1 with the Flood Management Project of the Year award. More
than 200 people were in attendance at its annual awards banquet as ASCE OC honored
outstanding individuals and projects for 2014. A total of 35 awards were given out,
including 21 project awards and 14 individual awards.
The Burris Pump Station Project, Phase 1 is the first phase of a two-phase project
to construct the Burris Pump Station. It is located in Burris Basin at the southern
end of the OCWD Off-River System along the Santa Ana River. The Orange County Water
District diverts Santa Ana River water into Burris Basin and uses the Burris Pump
Station to move 400 Acre-Feet (AF) per day of this water to the Santiago Basins
for recharge into Orange County's groundwater aquifer. The existing Burris Pump
Station is antiquated and has reached the end of its useful life. However, the drought
in California has made it more important than ever that OCWD keep the existing pump
station functional to continue capturing and recharging as much of the Santa Ana
River water as possible while the new one is being built. OCWD also has the responsibility
to maintain the beneficial uses that Burris Basin provides to the many aquatic species
and seabirds that use the basin for habitat and nesting.
In order to accomplish this, OCWD divided the project into two phases. Phase 1 construction
included building an earthen coffer dam around the site of the new pump station.
This work was performed after the nesting season ended, during the dry season when
the water level could be lowered for construction. Creating a coffer dam that allows
construction of the new pump station while the existing Burris Pump Station remained
functional was not an easy task. The new pump station is a large structure with
an overall height of 100 feet and a wet well that will be 70 feet in diameter. The
coffer dam was constructed using 130,000 cubic yards of soil excavated from the
basin and created a work area that is 2.7 acres in size and 40 feet below the basin's
high water elevation. Burris Pump Station Project Phase 1 construction allows construction
of the new pump station to proceed without disrupting seabird nesting habitat or
interrupting groundwater recharge operations.
OCWD worked closely with the U.S. Army Corps of Engineers, Department of Fish and
Wildlife, California Region Water Quality Control Board, Orange County Department
of Public Works, and Orange County Flood Control to accomplish the coffer dam, which
was a major part of Phase I.