Pinole Creek Bank Erosion Repair
Summary
SCH Number
2023070458
Public Agency
Contra Costa County
Document Title
Pinole Creek Bank Erosion Repair
Document Type
NOE - Notice of Exemption
Received
Posted
7/21/2023
Document Description
The purpose of the project is to repair a bank failure that is approximately 30 feet
long by 15 feet wide, located on the eastern side of Pinole Creek behind the Gateway Shopping Center. The project consists of removing the failed bank material within the eroded area by excavating a keyway trench at the toe of the embankment, with intermittent benches as the excavation progresses up the slope. The bank will then be reconstructed by backfilling with suitable material. Rock slope protection will be placed to protect against erosion; the rock voids will be filled with native soil and a native seed mix. A temporary water diversion system will be used to dewater the work area. Construction depths will vary among project elements; the maximum depth of excavation will be approximately 5 feet for installation of the keyway. The repair will extend approximately 100 feet long in order to transition the grade of the bank failure repair area to the adjacent channel slopes. The adjacent access road and trail will be repaved. Real Estate transactions, including temporary construction easements, may be necessary. Construction is anticipated to occur in 2024. Work will take place during the dry season and is anticipated to be completed in approximately 25 working days. The adjacent trail will be closed to the public during the entire period of construction. Temporary traffic control will be required. Appropriate best management practices for water pollution control will be implemented to protect the creek. Tree and vegetation
trimming will be necessary. Applicable regulatory permits will be obtained before construction.
Contact Information
Name
Alex Nattkemper
Agency Name
Contra Costa County Public Works Dept.
Job Title
Environmental Analyst
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Location
Coordinates
Cities
Pinole
Counties
Contra Costa
Regions
Citywide
Cross Streets
Henry Avenue
Zip
94564
Total Acres
0.59
Jobs
5
Parcel #
401-230-CCC
State Highways
SR-4
Railways
Union Pacific, BNSF
Airports
N/A
Schools
Collins, Stewart, & St. Joseph Elementaries, Pinole Valley High
Waterways
Pinole, Duncan, Faria, Ohlone, Refugio, Garrity, Appian, & Wilkie Creeks, San Pablo Bay
Township
2N
Range
4W
Section
22
Base
Diablo
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Article 19, Section 15301(d)
Reasons for Exemption
The activity consists of the repair of a damaged portion of an existing flood control facility to meet current standards of public health and safety involving no expansion of existing use.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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