IEP Monitoring Programs

Core monitoring surveys make up the long-term backbone of the IEP monitoring program (see examples). These surveys have come into existence since before many existing environmental or endangered species laws, and due to their long-term record, are critical to understanding recent variability in the environment, population sizes, and general trends in climate and hydrology in the San Francisco Estuary and associated watersheds.

Examples of use of the data collected in these surveys can be found here:

Many current important survey programs were created in response to needs by agency managers and policymakers for additional information or more “real-time” water project decision-making requirements. As we become more sophisticated in our understanding of San Francisco Estuary ecology, our information needs evolve and grow. The IEP works with our member agencies, stakeholders, the research community, and the public to understand changing information needs and collect relevant species and environmental data.

Research Fleet Monitoring Status Calendar

The table below represents the current monitoring status of the IEP Research Fleet.

Interagency Ecological Program Field Monitoring Status as of November 28, 2022
Agency/Survey Study Schedule Current Status Comments
CDFW Adult Striped Bass
(IEP PEN#002)
Feb - May Out of Season  
CDFW Fall Mid-Water Trawl
(IEP PEN#003)
Sep - Dec Occurring Complete for November.
CDFW Adult Sturgeon
(IEP PEN#005)
Aug - Oct Out of Season  
CDFW Summer Townet Survey
(IEP PEN#007)
Jun - Aug Out of Season  
CDFW Bay Study
(IEP PEN#011 and #012)
Jan - Dec Occurring  
CDFW 20-mm Survey
(IEP PEN#033)
Mar - Jul Out of Season  
USFWS/CDFW Mossdale Trawl
(IEP PEN#071)
Jan - Dec Occurring Mossdale trawl was being completed as scheduled through mi-November; however, flows on the SJR have been extremely low and trawling has been replaced with a Mossdale boat seine run. Mossdale will be scheduled as water levels rise. Mossdale sampling canceled on 11/22 due to staffing shortage.
CDFW Knights Landing Screw Traps
(IEP PEN#074)
Aug 2021 -
Jun 2022
Occurring Screw trap was pulled from water from Nov 6-15 due to heavy duckweed infestation.
CDFW Upper Estuary Zooplankton
(IEP PEN#077)
Jan - Dec Occurring The sampling survey for November was finished on Monday, November 21 without incident. Survey for December is scheduled to begin the 12th of December.
CDFW Spring Kodiak Trawl
(IEP PEN#088)
Jan - May Out of Season  
CDFW Smelt Larval Survey
(IEP PEN#096)
Dec - Mar Out of Season  
CDFW Smelt Larval Entrainment Pilot Study
(IEP PEN#352)
Jan - May Out of Season  
DWR EMP Continuous
(IEP PEN#072)
Jan - Dec Occurring  
DWR EMP Discrete
(IEP PEN#072)
Jan - Dec Occurring  
DWR Yolo Bypass Fish Monitoring (IEP PEN#047) Jan - Dec Occurring  
DWR San Joaquin River DO (IEP PEN#073) Jan - Dec Occurring  
UC Davis Suisun Marsh Monitoring (IEP PEN#093) Jan - Dec Occurring  
UC Santa Cruz/NMFS Enhanced Acoustic Telemetry
(IEP PEN#333)
Jan - Dec Complete for
2022 Season
USFWS Delta Juvenile Fish Monitoring Program -
Beach Seines (IEP PEN#053)
Jan - Dec Occurring Beach seining has continued as scheduled. The Sac Seine run is being conducted three days per week. SJ Seine is being conducted by vehicle as the flows in the river are too low to allow access by boat.
USFWS Delta Juvenile Fish Monitoring Program -
Chipps & Sacramento Trawls (IEP PEN#053)
Jan - Dec Occurring Chipps canceled 11/9 due to vessel issue. Chipps partial sampling on 11/18 due to harassment from another vessel.
USFWS Enhanced Delta Smelt Monitoring
(IEP PEN#325)
Jan - Dec Occurring  
USGS Continuous Flow -
Water Quality Monitoring
(IEP PEN#029 & PEN#030)
Jan - Dec Ongoing  
Fish Salvage Monitoring N/A Ongoing More information on salvage export/density data can be found on the CDFW Fish Salvage Monitoring page.