North Central Region Office has been active with Delta-related studies and improvements through its
data collection activities. An Acoustic Doppler Current Profiler has been installed at Old
River at Head below the barriers. Flow measurements are being taken periodically to in order
to develop a rating table. The flow values are being telemetered into
CDEC as real time flows. The ID for the Old River is
OH1. An additional ADCP is planned to be installed at the Rough and Ready tide gage to
monitor the flows in the Stockton Ship Channel.
The Old River near DMC, Middle River, and the Old River at Head barriers were recently
installed. The Old River at Head barrier was removed, and the Grantline barrier was
installed in June. North Central Region Office is continuously monitoring the water quality in the
South Delta for the period that the barriers are in place. A new water quality monitoring
station has been installed in the Old River near Delta Mendota Canal. This station consists
of a multi-parameter continuous monitoring instrument, which will conduct hourly readings to
ascertain the water quality directly adjacent to the rock barrier.