Deer Valley Road Safety Improvements
Summary
SCH Number
2025031364
Public Agency
Contra Costa County
Document Title
Deer Valley Road Safety Improvements
Document Type
NOE - Notice of Exemption
Received
Posted
3/28/2025
Document Description
The purpose of this project is to provide roadway safety improvements along four curves on Deer Valley Road. This project consists of installing dynamic/variable speed feedback signs and roadside warning signs, installing guardrail, and widening curves. Curve 1 will install two speed feedback signs, widen the shoulder by six feet for approximately 350 linear feet, and place shoulder backing along the edge of the pavement. Curve 2 will install one speed feedback sign and replace the existing Chevron warning signs to a more reflective material. Curve 3 will widen the existing pavement by two feet, install one speed feedback sign, and approximately 500 linear feet of new guardrail. Curve 4 will widen the gravel shoulder to six feet from the edge of pavement and install eight Chevron warning signs along the curve and install two speed feedback signs. Ground excavation to a depth of approximately six feet will be necessary for installation of speed feedback signs and guardrail. Vegetation trimming may be necessary. Three mature eucalyptus trees will be removed to increase visibility on one curve. The project is in the East Contra Costa County Habitat Conservation Plan (HCP) and will comply with HCP requirements. Real estate transactions and utility relocations will be necessary. Construction is anticipated to begin in summer 2026 and take approximately two months to complete; temporary traffic control is expected to last for approximately the same period. Emergency vehicles will have access at all times.
Contact Information
Name
Claudia Gemberling
Agency Name
Contra Costa County Public Works Department
Job Title
Principal Environmental Analyst
Contact Types
Project Applicant
Phone
Location
Coordinates
Cities
Brentwood
Counties
Contra Costa
Regions
San Francisco Bay Area
Cross Streets
Balfour Road
Zip
94513
Schools
Heritage High School, Adams Middle School
Waterways
Briones Creek
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301(c)
Reasons for Exemption
The project consists of minor alterations of an existing roadway to increase roadway safety with no expansion of use pursuant to Article 19, Section 15301(c) of the CEQA guidelines.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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