The Small Construction Rainfall Erosivity Waiver applies to sites of what size?

• A. 6-10 acres
• B. 0-0.5 acres
• C. 1-5 acres
• D. 5-10 acres

Answer: (C)

Regulatory thresholds define who qualifies for the rainfall erosivity waiver, and this one is targeted at small construction projects defined by disturbed area. The waiver applies to sites that disturb between 1 and 5 acres, inclusive. That range is chosen to ease requirements for smaller projects while still ensuring basic stormwater controls. Sites smaller than 1 acre aren’t covered, and sites larger than 5 acres aren’t covered either. Therefore, the correct size range is 1-5 acres.