S.D. Admin. R. 74:29:07:09

Current through Register Vol. 51, page 67, December 16, 2024

Section 74:29:07:09 - Surface runoff diversions

Surface runoff diversions must meet the following general requirements:

(1) In soils or other unconsolidated material, the sides of diversion ditches may be no steeper than two horizontal to one vertical. The sides and, in ditches carrying intermittent discharges, the bottom must be stabilized by seeding with grasses or other methods specified in the reclamation plan as soon as practicable;

(2) In rock, the sides of diversion ditches must be stable;

(3) Rock riprap, concrete, geosynthetic liners, geosynthetic filter media, soil cement, or other methods must be used where necessary to prevent erosion;

(4) Culverts or bridges must be installed where necessary to allow access;

(5) Diversion ditches must be constructed to minimize hazards to humans, wildlife, or livestock;

(6) Surface runoff diversions around milling or processing facilities using potentially toxic chemicals or materials must be capable of carrying the flow from the six-hour probable maximum precipitation event without causing erosion;

(7) All other surface water diversions must be capable of carrying a minimum of the two-year six-hour precipitation event without causing erosion; and

(8) Diversion ditches may not discharge on topsoil storage areas, spoil, or other unconsolidated material such as newly reclaimed affected lands.

S.D. Admin. R. 74:29:07:09

14 SDR 111, effective 3/3/1988.

General Authority: SDCL 45-6B-81.

Law Implemented: SDCL 45-6B-41, 45-6B-45.

Definition of probable maximum precipitation, § 74:02:08:01.