Farmington Groundwater Recharge Program was launched in 2003 and
is the result of prior efforts to analyze and evaluate opportunities
for development of water supplies for Eastern San Joaquin County.
to the Farmington Program was the Farmington Groundwater Recharge
and Seasonal Habitat Study. Completed in 2001, this feasibility-level
study was developed to determine the potential for development
of integrated groundwater recharge and seasonal habitat improvements
in Eastern San Joaquin County. Conclusions of the study became
the outline for the first phase of the Farmington Program, which
includes implementing the flooded-field groundwater recharge technique
on up to 1,200 acres for an average water recharge of approximately
35,000 acre-feet per year.
study followed the Farmington Dam and Reservoir Conjunctive Use
Study. Completed in 1998, the Conjunctive Use Study evaluated
potential structural and operation changes Farmington Dam and
found that long-term storage at Farmington Reservoir does not
appear to be cost effective; however, operations modifications
to Farmington Dam and construction of groundwater recharge facilities
does appear cost effective. The Conjunctive Use Study recommended
that the feasibility of groundwater recharge with integrated seasonal
waterfowl habitat areas in eastern San Joaquin County be evaluated.
Use Study followed the October 1996 update to the 1990 California
Water Plan, a document of the California Department of Water Resources
to review, analyze and provide recommendations for managing and
long-term planning of the state’s water supply. At that time,
authors noted that groundwater basins in the San Joaquin River
region were in overdraft and predicted that without action continued
use would exacerbate the situation. This overdraft contributed
to an estimate that by 2020, without additional facilities and
improved water management, state-wide annual shortages of 3.7
to 5.7 million acre feet would occur during average years.
(Note: In its 1990 report, authors noted that the annual groundwater overdraft in San Joaquin County was 70,000 acre-feet/year. The 2003 update to the 2000 California Water Plan lists overdraft to Eastern San Joaquin County at 113,000 af/year.)
Acting on this, and other information, Stockton East Water District (SEWD) took a lead role working with the U.S. Army Corps of Engineers (Corps) to develop a conjunctive use strategy for Eastern San Joaquin County. Members of the study management team and executive coordinating committee included SEWD, the Corps, the Central San Joaquin Water Conservation District, the North San Joaquin County Water Conservation District, City of Stockton, San Joaquin County, and CAL-Water Service Company. Program milestones included:
- 1986 Corps authorized to study modifications to Farmington Dam for conjunctive use
- 1998 Conjunctive Use Study finds groundwater recharge is the most cost effective choice
- 1999 Technical study of groundwater recharge techniques and locations began
- 2000 Congress authorized Farmington Groundwater Recharge Program no Federal appropriations were provided in 2000
- 2001 Technical study completed and defined details of the Program
- 2002 Federal and local cost-sharing agreement reached to start implementation of the Farmington Groundwater Recharge Program. First Federal funds provided to kick-off the Program.
- 2003 Federal appropriations provided for initial Program investigations.
For more information about the Farmington Groundwater Recharge and Seasonal Habitat Study, visit: http://www.spk.usace.army.mil/projects/civil/farmington/