Erosion Control: Corona vs Riverside
How do erosion control rules compare between Corona, CA and Riverside, CA?
Corona and Riverside have similar restriction levels.
Corona, CA
Riverside County
Corona requires erosion and sediment control measures on all grading and construction sites under Municipal Code Title 15 and the California Building Code. Hillside areas in south Corona near the Cleveland National Forest face stricter requirements due to steep slopes and wildfire-burn scar runoff potential.
View full Corona rules →Riverside, CA
Riverside County
Any grading project that could transport silt or sediment into the public right-of-way or city storm drain system must install perimeter erosion/sediment BMPs (silt fence, straw wattles, etc.) and may be required to post a bond under Riverside Municipal Code Title 17.
View full Riverside rules →Key Facts Comparison
| Fact | Corona | Riverside |
|---|---|---|
| - | - | |
| Code citation | - | RMC Title 17 — Grading; §17.24.010.D (bonding) |
| Grading permit threshold | - | More than 50 cubic yards of soil disturbance |
| Perimeter BMP cost (bonding) | - | ~$2.00/linear foot + $1,000 install flat rate |
| State permit trigger | - | 1 acre disturbance — Construction General Permit + SWPPP |
| Administering department | - | Public Works Department, (951) 826-5341 |
Highlighted rows indicate differences between cities.
Corona FAQ
Riverside FAQ
Do I need erosion control for a small backyard grading project in Riverside?
If you disturb 50+ cubic yards of soil you need a grading permit, and any site that could send sediment toward the street or storm drain must install BMPs (silt fence, wattles, or gravel bags). Smaller exempt projects (RMC §17.12.010) still must not allow sediment to enter the storm drain — that is independently an MS4 violation.
What is the bonding requirement for grading in Riverside?
Under RMC §17.24.010.D, grading permits with elevated silt/sediment transport potential may require a bond, cash deposit, or other approved security to guarantee completion. The city estimates BMP costs at roughly $2/linear foot plus a $1,000 installation flat rate for bonding calculations.
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