State Route 29 Culvert Permanent Restoration Project (EA 04-0Q820) (Notification of Lake or Streambed Alteration, No. EPIMS-NAP-26858-R3)


SCH Number
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Document Title
State Route 29 Culvert Permanent Restoration Project (EA 04-0Q820) (Notification of Lake or Streambed Alteration, No. EPIMS-NAP-26858-R3)
Document Type
NOE - Notice of Exemption
Document Description
The Project is limited to the SR-29 Permanent Culvert Restoration Project. Caltrans will rehabilitate and repair an existing 42-inch alternative pipe culvert (APC) along SR 29 from PM 11.6 to PM 13.0. The repair/rehabilitation will include replacement of the existing APC and other damaged drainage structures. The existing 42-inch APC drains stormwater runoff from the SR-29 and Trancas Street interchange south toward Napa Creek. Open trench excavations will remove and replace the existing culvert north of Napa Creek, initiating at the existing headwall and extending approximately 35 feet to the north and upslope. The existing headwall will remain in place, the culvert will be excavated, replaced, and backfilled. Open trench excavations will include complete removal of the existing culvert and 7.5-foot wide trenching up to 15 feet deep where necessary. Shoring will be used at locations where trench depth is more than 5 feet. Tree removal will be performed where open trenching or pit excavations interfere with roots systems or trees occur within the direct path of the trench. Three riparian trees located within the path of the planned trench excavation will be removed.

Contact Information

Robert Stanley
Agency Name
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency


Northern California, San Francisco Bay Area
Other Location Info
The Project is located on State Route (SR) 29 from post mile (PM) 11.6 to 13.0 within the City of Napa, Napa County, in the State of California.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
This Project involves the repair and maintenance of an existing public facility involving a negligible or no expansion of the former use prior to construction.
County Clerk


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