Opportunity for public comment on proposal for the upgrade and expansion of the water monitoring network in the Sacramento-San Joaquin Delta

Release Date:

The U.S. Geological Survey (USGS) is providing the opportunity for the public to review and comment on an Environmental Assessment (EA) for the proposed construction, upgrade, and maintenance of new and existing monitoring stations in the Sacramento-San Joaquin Delta (Delta). 

Steel piling mounted with solar panels, electronics enclosure, and PVC tubing standing in a body of water

Standard configuration of a Sacramento-San Joaquin Delta flow and water quality monitoring station. The U.S. Geological Survey (USGS) has operated and maintained a monitoring network in the Sacramento-San Joaquin Delta since the 1970’s. The steel pilings house  acoustic doppler velocity meters (ADVM), pressure sensors and/or water quality sondes, solar panels, and navigational safety signage. (Public domain.)

The USGS has operated and maintained a monitoring network in the Delta since the 1970’s to collect flow and water quality data. Over time, as technology improved, and monitoring needs changed, the network has expanded to include more locations and additional parameters. To continue this mission, there is a need for infrastructure maintenance or modification at some of our existing stations and a need for additional infrastructure at new locations. 

As part of a broader effort to implement a more robust monitoring  network in the Delta, the USGS California Water Science Center submitted a permit request to install up to 180 steel pilings to support new monitoring equipment.  An Environmental Assessment (EA) is being conducted to address potential noise issues during construction and potential impacts of construction on local threatened or endangered species.  

The EA can be accessed here

We invite public comment on this project.  The public review and comment period is August 30 – September 13, 2021.

Please submit comments via email to SSJDcomments@usgs.gov prior to September 13, 2021. 

Map of the Sacramento-San Joaquin Delta displaying locations of existing & proposed water quality monitoring equipment

Locations of existing and proposed water quality monitoring stations in the Sacramento-San Joaquin Delta as per U.S. Geological Survey Monitoring Network Sacramento-San Joaquin Delta and Suisun Bay, California Environmental Assessment.  As part of a broader effort to implement a more robust monitoring network in the Delta, the USGS California Water Science Center submitted a permit request to construct install up to 180 steel pilings to support new monitoring equipment. (Public domain.)