San Ramon, CA Environmental Rules: Erosion Control (2026)
Key Facts
- Rainy season window
- October 15 through April 15
- Plan deadline
- September 1 each year, C7-67
- Governing section
- San Ramon Municipal Code C7-66 to C7-68
- Reinstatement fee after revocation
- Half the original permit amount
- Violation classification
- Misdemeanor, separate offense per day
Summary
San Ramon requires an approved erosion control system on every active grading site before the October 15 to April 15 rainy season under Municipal Code C7-66. Erosion control and stormwater pollution prevention plans must reach the director by September 1 each year, and failure to install protection can trigger city-ordered emergency work billed to the owner.
Where necessary, temporary and/or other devices such as desilting basins, check dams, riprap or other devices or methods, as approved by the director, shall be employed to control erosion and provide safety during the rainy season from October 15th to April 15th. The plan must be approved or waived by the director and all measures necessary to implement the plan in place before October 15th if grading is to be allowed between October 15th and April 15th. No grading work will be allowed between October 15th and April 15th on any single grading site under permit unless an erosion control system has been approved or waived by the director per Section C7-67.
Full Breakdown
Division C7, Chapter IV of the Municipal Code governs erosion control on graded property. Section C7-66 requires cut and fill slope faces and the project site to be prepared and maintained against erosion in accordance with the division and the city's Grading Manual; where cut slopes are erosion-resistant, the director may waive protection. Where erosion control is needed, the code requires temporary or permanent devices, desilting basins, check dams, or riprap approved by the director, and no grading work is allowed between October 15 and April 15 on a permitted site unless an erosion control system has been approved or waived under Section C7-67.
3 Guidebook. A single residential lot project can get the plan waived if an approved erosion control system is already installed before October 15. Section C7-68 places continual maintenance of erosion control devices during the rainy season on the contractor, permittee, or project owner; if they fail to maintain the devices, the director may order emergency maintenance and charge the owner the mobilization cost plus the cost of the work, may revoke the grading permit in writing, and can require a renewal fee equal to half the original permit amount before the permit is reinstated.
Grading done without a valid permit still exposes the property owner to a required erosion control plan and to emergency work costs under the same cost-recovery rule.
Violations & Fines
Grading in violation of the erosion control provisions is a misdemeanor under Section C7-83, with each day of a continuing violation charged as a separate offense; the director can also withhold or revoke building permits and certificates of occupancy on the property and can declare unpermitted or noncompliant grading a public nuisance subject to abatement under Section C7-84.
Frequently Asked Questions
When must an erosion control plan be submitted in San Ramon?
Can grading continue through the winter without erosion control?
What happens if erosion control devices are not maintained?
Sources & Official References
Other rules in San Ramon
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Erosion Control in Nearby Cities
How other cities in Contra Costa County handle erosion control.