Ariz. Admin. Code § R11-3-602 - Erosion Control and Topographic Contouring

A. The responsible party shall ensure an aggregate mining unit is reclaimed to a stable condition for erosion control and seismic activity.

B. The responsible party shall ensure grading and other topographic contouring are conducted, as necessary, to establish final land forms that are:

1. Suitable for the post-aggregate mining land use objective in the approved reclamation plan, and

2. Stable under static and dynamic conditions as certified by a qualified engineer considering the following:

a. Site-specific seismic conditions,

b. Safety factors consistent with good engineering practices, and

c. The hazard to public safety if failure occurs.

C. The responsible party shall ensure site-specific grading, revegetation, and other erosion control measures are conducted to minimize erosion.

D. The responsible party shall erosion control measures are conducted so permanent piles of aggregate mine overburden and fine materials do not restrict surface drainage, contribute to excessive erosion, or compromise the stability of the reclaimed aggregate mining unit.

E. The responsible party shall ensure a reclamation plan includes:

1. A narrative describing the current topography and proposed final topography of the aggregate mining unit;

2. Measures to be taken including the final slope configuration, to reclam overburden dumps, waste-rock stockpiles, sediment ponds, and fines piles; and

3. Re-grading and reclamation measures to be taken regarding excavations, ponds, open pits, and rock faces unless the Inspector has determined measures under this subsection are impractical under A.R.S § 27-1275.

F. If an excavation, pond, open pit, or rock face is not to be reclaimed under A.R.S. § 27-1275, the responsible party shall include in the reclamation plan measures adequate to restrict access to the hazard and maintain public safety. The measures may include installing and maintaining berms, fences, and other barriers, posting warning signs, or taking any combination of measures adequate to protect the public.

Notes

Ariz. Admin. Code § R11-3-602

Adopted by final rulemaking at 25 A.A.R. 828, effective 5/11/2019.