Erosion Control: Hesperia vs Rancho Cucamonga
How do erosion control rules compare between Hesperia, CA and Rancho Cucamonga, CA?
Hesperia and Rancho Cucamonga have similar restriction levels.
Hesperia, CA
San Bernardino County
Hesperia's SWMP requires Erosion and Sediment Control Plans (ESCPs) for construction sites, including single-family residences, to prevent sediment discharge into the Mojave River watershed. Projects disturbing one acre or more must enroll under the statewide Construction General Permit (Order 2022-0057-DWQ) via the State Water Board's SMARTS system and prepare a SWPPP signed by a Qualified SWPPP Developer. Standard BMPs include silt fences, fiber rolls, stabilized construction entrances, soil stockpile covers, and post-construction revegetation.
View full Hesperia rules →Rancho Cucamonga, CA
San Bernardino County
Rancho Cucamonga requires erosion control plans for grading over 50 cubic yards per Municipal Code Title 19. Plans must include BMPs effective through the October 1 to April 30 rainy season.
View full Rancho Cucamonga rules →Key Facts Comparison
| Fact | Hesperia | Rancho Cucamonga |
|---|---|---|
| CGP trigger | ≥1 acre of soil disturbance (Order 2022-0057-DWQ) | - |
| Local rule | Hesperia SWMP — ESCP required even for single-family residential construction | - |
| Required roles | Qualified SWPPP Developer (QSD) + Qualified SWPPP Practitioner (QSP) | - |
| Receiving water | Mojave River watershed (Lahontan Region) | - |
| Threshold | - | 50 cubic yards |
| Rainy season | - | Oct 1 to Apr 30 |
| Plan required | - | Civil engineer |
| Citation start | - | 500 dollars |
| Contact | - | (909) 477-2740 |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Do I need a SWPPP for a 0.5-acre site in Hesperia?
No — the statewide Construction General Permit threshold is 1 acre of soil disturbance. However, Hesperia's SWMP requires an Erosion and Sediment Control Plan (ESCP) with BMPs (silt fences, stabilized entrance, sediment controls) for smaller sites, including single-family residential builds. Check with the Engineering Department.
What BMPs are typically required?
Stabilized construction entrance to prevent track-out, silt fence or fiber rolls along perimeter, soil stockpile covers, concrete washout containment, inlet protection for storm drains, and post-construction soil stabilization (revegetation, hydroseed, or rock cover) — per the city's SWMP construction handouts.
Rancho Cucamonga FAQ
Do I need erosion control for a small backyard project?
Projects under 50 cubic yards typically do not require a formal plan, but basic BMPs like silt fencing are still recommended during storms.
What if I start building in summer and finish after October 1?
You must have all erosion control BMPs installed and maintained by October 1, regardless of project completion status.
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