Dredging Underway

barge on river with excavator on it

Planned Dredging for 2022

The Upper Napa Federal O&M channel consisted of Reaches 1 through 3.  Reach 1 from Third Street to Oak Street, Reach 2 from Oak Street to Imola Avenue, and Reach 3 from Imola Avenue to the southern end of Kennedy Park. Dredging Operations commenced September 26 and concluded Nov. 23, 2022.   

Reach 1 was completely dredged to design depth of 10 feet MLLW.  Reach 2 (Napa Yacht Club area) was partially dredged to design depth; approximately 6 feet MLLW, prior to the upland disposal site reaching capacity.  Reach 3 was not dredged at all.

If you have any questions, you can email or contact USACE or NCFCWCD with the information below.

USACE Email: cespn-pa2@usace.army.mil

USACE Phone Line 1 (415) 503-6804

NCFCWCD Email: joseph.panchesson@countyofnapa.org

NCFCWCD Phone Line: 1 (707) 259-8600

Napa River O&M Dredging Map (9-9-2022)

Public Meeting Slides (April 21, 2022)

Napa River

NAPA RIVER
OPERATIONS AND MAINTENANCE

PROJECT LOCATION AND DESCRIPTION

The Napa River Channel is a shallow draft channel approximately 16 miles long, that is mainly used for light commercial and recreational navigation. The Channel extends from the City of Vallejo, which is located on San Pablo Bay, northward to the City of Napa. The Operations and Maintenance (O&M) schedule provides for a six-year cycle of maintenance dredging for the Channel to a depth of 15 feet Mean Lower Low Water (MLLW) from the Mare Island Strait Causeway to Asylum Slough (downstream portion) and 10 feet MLLW to the head of navigation at the Third Street Bridge in the City of Napa (upstream portion).  The channel was last dredged in FY22 approximately 35,000 cyds of material was removed during the operation. 

 

TOTAL FUNDING

 

TOTAL COST

 N/A

FEDERAL COST

N/A

NON-FEDERAL COST

 N/A

 

 

FISCAL YEAR 2022 ALLOCATION

$4,750,000

FY 2023 ALLOCATION

$0

COST TO COMPLETE

 N/A

 

FY 22 accomplishments

  • Maintenance dredging was completed.

FY 23 accomplishments

  • Complete Geospatial Land Data Migration into the Corps Map system.

ISSUES AND OTHER INFORMATION

  • The Napa County Flood Control and Water Conservation District is the NFS.
  • The NFS has been actively pursuing additional Congressional funding.  .
  • The project is on a 6-year cycle.  However, in FY17, major winter storms caused a large amount of runoff silt to fill the channel with depths in some locations of -2 ft or less.
  • The channel was dredged in FY16 and approximately 70,000 cubic yards of material was removed.
  • Two of three reaches of the channel was dredged in FY22 and approximately 35,000 cubic yards of material was removed.  The third reach was not dredged due to capacity issues at the upland disposal site.  Approximately 8,800 cubic yards of material was not dredged at Reach 3.
  • The project delivery team continues to coordinate with the NFS on closeout of the FY22 dredging episode. The NFS is also implementing a large flood-reduction project with the Sacramento District, USACE. Maintenance of the navigation channel in the Napa River will benefit the Napa River flood reduction project.

CONGRESSIONAL INTEREST 

  • 4th District, Rep. Mike Thompson
  • 8th District, Rep. John Garamendi

POINT OF CONTACT

  • Deputy for Project Management, (415) 503-6593.

Updated on 14 February 2023

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