02-1J350 Diddy Roost Culverts Project
Summary
SCH Number
2025091124
Public Agency
California Regional Water Quality Control Board, Central Valley Redding Region 5
(RWQCB)
Document Title
02-1J350 Diddy Roost Culverts Project
Document Type
NOE - Notice of Exemption
Received
Posted
9/24/2025
Document Description
The Project consists of the replacement of 26 culverts and 11 drainage inlets. Of the 26 culverts, 25 will be replaced by cut and cover while the remaining culvert will be replaced with trenchless methods.
The culverts being replaced by cut and cover will be upsized to a minimum diameter of 24” for maintenance purposes. The remaining culvert replacement will be upsized to a minimum of 36” for constructability purposes. Replaced systems will receive inlet and outlet treatments including headwalls, drainage inlets, and flared end sections. Rock slope protection will be placed at systems at Postmile 45.45 and Postmile 50.00.
Contact Information
Name
Lynn Coster
Agency Name
Central Valley Regional Water Quality Control Board
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Name
Azeddine Bahloul
Agency Name
California Department of Transportation
Job Title
Project Manager
Contact Types
Project Applicant
Phone
Location
Coordinates
Cities
Ingot, Round Mountain
Counties
Shasta
Regions
Northern California
Other Location Info
Postmile 41.1 to 55.3 on State Route 299
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Title 14, Article 19, Section 15301, Existing Facilities
Reasons for Exemption
This project is categorically exempt under CEQA section 15301 because the project involves activities to repair and maintain existing transportation facilities involving negligible or no expansion of existing or former use.
County Clerk
Shasta
Attachments
Notice of Exemption
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