Alamo Creek Box Culvert Headwall Repair at Old Ranch Road, City of San Ramon


SCH Number
Public Agency
City of San Ramon
Document Title
Alamo Creek Box Culvert Headwall Repair at Old Ranch Road, City of San Ramon
Document Type
NOE - Notice of Exemption
Document Description
The proposed project is the repair of an existing culvert that carries Alamo Creek under Old Ranch Road. The culvert is a triple 10-foot by 10-foot reinforced concrete box culvert approximately 99.25 feet in length. The project proposes to construct a new headwall in front of the existing headwall and buttress supports on the channel side at the north end of the culvert. The existing wall would ramin in place and would act as the formwork for the backside of the new headwall. The new headwall would have two buttresses that would be doweled into each of the existing box culvert walls and into the roof of the existing box culvert. The buttresses are an extension of the existing box culvert interior walls. A temporary cofferdam with bypass pipe will be required in the channel during construction. The project also includes the removal of approximately 30 cubic yards of silt that is located at the south end of the culvert and is blocking drainage in the eastern cell. All access to Alamo Creek will be via the northwest quadrant which was previously gunnited (covered with concrete and rocks) to minimize erosion. Construction is anticipated to require approximately 60 days. Construction is anticipated to begin in the summer of 2005 and be complete before November 1, 2005.

Contact Information

Peter Phoon
Agency Name
City of San Ramon
Contact Types
Lead/Public Agency


San Ramon
Contra Costa

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15301, 15302
Reasons for Exemption
Project will repair an existing structure. The project applicant will obtain a Section 404 permit from the U.S. Army Corps of Engineers (Corps) (and comply with the federal Endangered Species Act requirements) and a Section 401 water quality certification from the Regional Water Quality Control Board. The project will also require the issuance of a streambed alteration agreement from the California Department of Fish and Game. Compliance with these permits will ensure that the project has no potential to cause a significant effect on the environment.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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