5/16/2022

10 Day General Northern California Precipitation Forecast: As of this morning, there is a 2% chance of precipitation today, a 4% chance tomorrow, a 1% chance on 5/18, a 0% chance on 5/19, a 0% chance on 5/20, a 1% chance on 5/21, a 0% chance on 5/22, a 0% chance on 5/23, a 0% chance on 5/24 then a 1% chance on 5/25.

 

From CDEC: Precipitation to date for water year 2021-2022 - As of 5/16/2022:

Northern Sierra Precipitation Index: 39.8" = 80% of average for this date

 

San Joaquin Precipitation Index: 24.3" = 65% of average for this date

 

Tulare Basin Precipitation Index: 16.0" = 60% of average for this date

 

From CDEC: Average statewide snow water equivalents as of 5/16/2022:

North: 3.2" = 26% of normal for this date

 

Central: 3.5= 21% of normal for this date

 

South: 1.2" = 8% of normal for this date

 

Statewide: 2.9" = 18% of normal for this date

 

River Flows (Current and estimated future flow rates from NOAA's California Nevada River Forecast Center and CDEC)

Sacramento River (I Street Bridge/Freeport Bridge)

The 5/15 daily average reported 7,321 cfs which may be increasing to 8,759 cfs by 5/21.

Feather River (at Boyd's Landing)

The Feather was reporting 2,808 cfs on 5/16 and may be increasing to approximately 3,432 cfs by 5/21.

San Joaquin River (near Vernalis)

The San Joaquin was reporting 756 cfs on 5/16 and may be decreasing to approximately 681 cfs by 5/21.

 

Delta Cross Channel Gate Operation (From the USBR website)

Posted: 11/29/2021

Delta Cross Channel Gates will close on Tuesday, November 30, 2021, at approximately 1000 hours.

Gates will remain closed until further notice.

Comment: Rio Vista flow requirement/Seasonal closure.

PLEASE NOTE: GATES MAY NEED TO BE CLOSED WITH SHORT NOTICE IF A FISHERY CONCERN IS IDENTIFIED.

 

EC and Bromide - Banks Pumping Plant, Jones Pumping Plant, Clifton Court Forebay (EC only), San Joaquin River at Vernalis, Gianelli Pumping Plant, Sacramento River at Hood (EC only) Note: There is a problem at Jones with the EC probe

Gianelli has been switching between discharge generation, discharge pumping and no pumping from time to time. During the period, EC and bromide have been stable with only slight changes depending on pumping. All other stations were stable with only Vernalis showing small changes caused by flow differences.   

Banks: EC - 436 uS/cm, Br - 0.13 mg/L, 10 days ago: 450 uS/cm and 0.15 mg/L

Jones Daily Average: EC - 401 uS/cm, Br 0.16 mg/L 10 days ago: 385 uS/cm and 0.16

Clifton Court Forebay Daily Average: EC - 401 uS/cm, 10 days ago: 393 uS/cm

Vernalis: EC 120 uS/cm, Br 0.06 mg/L, 10 days ago: 167 uS/cm and Br 0.07 mg/L

Gianelli: EC - 561 uS/cm, Br 0.26 mg/L, 10 days ago: 580 uS/cm and 0.30 mg/L

Hood: EC - 145 uS/cm, 10 days ago: 157 uS/cm

 

Organic Carbon, TOC, and DOC - Banks Pumping Plant, Jones Pumping Plant, San Joaquin River at Vernalis, Gianelli Pumping Plant, Sacramento River at Hood

All stations remained very stable over the period. Hood may see a slight increase due to a possible flow increase in the coming week..  

Banks: TOC = 4.8 mg/L, DOC = 4.3 mg/L, 10 days ago: 5.0, 4.6

Jones: TOC = 4.0 mg/L, DOC = 3.8 mg/L, 10 days ago: 3.8, 3.4

Vernalis: TOC = 2.0 mg/L, DOC = 1.7 mg/L, 10 days ago: 1.9, 1.8

Gianelli: TOC = 4.6 mg/L, DOC = 4.5 mg/L, 10 days ago: 4.4, 4.3

Hood: TOC = 1.7 mg/L, DOC = 1.6, 10 days ago: 1.7, 1.6

 

Daily Average Pumping: 5/6 through 5/15

Banks Pumping Plant ... ranged between 294 cfs and 1,088 cfs over the time period. The 5/15 average was 426 cfs.

Jones Pumping Plant ... ranged between 901 cfs and 915 cfs over the time period. The 5/15 average was 906 cfs.

Gianelli Pumping Plant ... discharge generation (San Luis Reservoir water moving out of the reservoir into O'Neill Forebay) ranged between zero cfs and 760 cfs over the time period. The 5/15 average was zero cfs. Discharge pumping (O'Neill Forebay water moving into San Luis Reservoir) ranged between zero cfs and zero cfs over the time period. The 5/15 average was zero cfs.

O'Neill Pumping Plant (Federal CVP) ... discharge generation (O'Neill Forebay water moving into the DMC) varied between zero cfs and 155 cfs over the time period. The 5/15 average was zero cfs. Discharge pumping (DMC water moving into O'Neill Forebay) ranged between 150 cfs and 775 cfs over the time period. The 5/15 average was 775 cfs.

Dos Amigos Pumping Plant ... ranged between zero cfs and 1,375 cfs over the time period. The 5/15 average was 417 cfs.

South Bay Pumping Plant ... ranged between 83 cfs and 180 cfs over the time period. The 5/15 average was 83 cfs.

Barker Slough Pumping Plant ... ranged between 86 cfs and 109 cfs over the time period. The 5/15 average was 109 cfs.

 

Status of the Temporary Barriers

 

 

Status of the Temporary Barriers as of May 13, 2022:

 

Middle River Barrier

In-water work started on May 10, 2022, at 4 pm.  The closure of the weir is expected to occur on May 16, 2022. 

 

Old River Tracy Barrier

In-water work started on May 11, 2022, at 8 am.  The closure of the weir is expected to start on May 27, 2022 and completed on May 28, 2022.

 

Grant Line Canal Barrier

In-water work is scheduled to start on May 17, 2022, and closure of the weir to start on June 1, 2022, and completed on June 4, 2022.

 

Environmental Compliance

As required by the environmental permits, pre-construction surveys were conducted in advance of construction.  Environmental monitors will be present during all phases of construction including the in-water work.  Environmental education will be provided to the crew members prior to starting work.  Required discrete turbidity and dissolved oxygen monitoring data will be collected during the in-water work phase of the construction. 

 

Water Temperature

Monitoring of water temperature at the San Joaquin River at Mossdale Bridge station (MSD) will be conducted as part of the 2019 National Marine Fisheries Service Biological Opinion on Long-term Operations of the Central Valley Project and State Water Project which states, “Barriers would include at least one culvert open to allow for fish migration when water temperatures are less than 71.6°F (22°C).”

 

Water Level Modeling

Modeling was conducted for the simulation period from May 4, 2022, through May 30, 2022, with the following modeling assumptions:

·       The Middle River Barrier will be closed on May 17.

·       The Old River at Tracy Barrier will be closed on May 30.

·       The Grant Line Canal Barrier will be closed on June 4.

DWR will continue to monitor and report water levels and conditions.

 

Aquatic Weed Issues

Presence and accumulation of aquatic weeds in the TBP areas will be monitored and reported to CA Department of Parks and Recreation Division of Boating and Waterways Aquatic Invasive Species Branch.