RUSLE Annual Soil Loss
Tons per acre per year a disturbed site sheds by the USDA public-domain RUSLE method, A = R x K x LS x C x P, plus the site total - the driver that sizes every SWPPP BMP. A bare 5-acre site (R 150, K 0.32, LS 1.5) loses 72 tons/acre/yr; a blanket dropping C to 0.10 pulls it to 7.2. Every factor is user-entered; the permitting AHJ governs.
Formula and source
a_tons_ac_yr = r_factor x k_factor x ls_factor x c_factor x p_factor; site_tons_yr = a_tons_ac_yr x acres.
RUSLE (Revised Universal Soil Loss Equation) by name - the USDA public-domain method (Agriculture Handbook 703); every factor user-entered.
Audience
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Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.