4 Va. Admin. Code § 25-31-400

Current through Register Vol. 41, No. 6, November 4, 2024

Section 4VAC25-31-400 - Overburden, refuse, spoil and waste fills

A. Overburden, refuse, spoil and waste disposal fills with the capability to impound water, sediment or slurried tailings, slimes or refuse in a liquid, or semi-liquid state, shall be designed and constructed in accordance with 4VAC25-31-500.

B. Overburden, refuse, spoil and waste disposal fills that do not have the capability to impound water or other liquid or semi-liquid materials, shall meet the requirements of this section.

C. Fills that are not impoundments shall be designed to meet the requirements of this section and use current, prudent engineering practices.

D. The plans and specifications for fills shall consist of an engineering design report that includes engineering calculations, drawings, and specifications. These shall take into account the size, location, and hazard potential of the fill and will include the following as necessary:

1. A site plan showing the location of the structure, associated access, surface and subsurface drainage systems, sediment control structures, and the proposed fill configuration.

2. Cross sections and profiles showing the original ground, proposed fill profile, location of terraces and constructed slopes.

3. Design details for all surface and subsurface drainage control structures.

4. A narrative description of site preparation, foundation evaluation and preparation, materials placement, material handling, and sequencing of construction.

5. A closure and final reclamation plan for the fill and associated structures.

E. Fills shall be constructed, operated, and maintained such that they perform in accordance with their design and purpose throughout the life of the fill.

F. Fills shall be constructed with slopes no steeper than two horizontal to one vertical for predominantly clay soils and no steeper than three horizontal to one vertical for predominantly sandy soils or must exhibit a static safety factor of 1.5 for other steeper slopes.

G. Fills shall be constructed, maintained and inspected to ensure protection of adjacent properties, preservation of public safety, and to provide prompt notice of any potentially hazardous or emergency situation.

H. Fills shall be closed and abandoned in a manner that ensures continued stability and compatibility with the post-mining land use.

4 Va. Admin. Code § 25-31-400

Derived from Virginia Register Volume 19, Issue 24, eff. September 11, 2003.

Statutory Authority

§§ 45.1-161.3 and 45.1-180.3 of the Code of Virginia.