Jewett Road PM 10.08 Culvert Replacement (Notification of Lake or Streambed Alteration, No. EPIMS-SON-18006-R3)


SCH Number
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Document Title
Jewett Road PM 10.08 Culvert Replacement (Notification of Lake or Streambed Alteration, No. EPIMS-SON-18006-R3)
Document Type
NOE - Notice of Exemption
Document Description
The project is limited to the removal of the existing twin 42-inch corrugated metal pipe (CMP) culverts that are failing and replacement with a 60-inch by 36-inch precast reinforced concrete box (RCB) culvert. The current culverts and proposed replacement culvert length are both 36-feet-long. The replacement culvert is sized for a 100- year storm. A trench will be cut through the pavement and road base to excavate the existing culverts, with equipment working from the roadway. The new culvert will then be placed in the trench in parts, assembled, and backfilled. Rock slope protection will be replaced within the existing footprint of the culvert to contain the backfilled material. All debris will be loaded onto dump trucks for disposal within a permitted and fully legal disposal site, and all excavation will occur within the existing culvert/road footprint. No exposed soils that could lead to future sources of sediment will remain following the completion of construction. Erosion control BMPs will be used and stored onsite. Dewatering of the site will be required if water is present at the site during project activities. All impacts from this project are temporary and will be located within the existing paved road prism.

Contact Information

James Hansen
Agency Name
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency


Unincorporated area
Northern California, San Francisco Bay Area
Other Location Info
The project is located at an unnamed tributary to the Petaluma River, where the unnamed tributary crosses under Jewett Road approximately 0.1 miles north of the intersection of Pepper Road and Jewett Road. The project is located in an unincorporated area of the County of Sonoma, State of California; Latitude 38.284768°, Longitude -122.710064°.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
Project consists of replacement of existing structures with the new structures will be located on the same site and have the same purpose as the structures being replaced.
County Clerk


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