2008-04-22_PERMIT FILE - C1981017 ‎(15)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/22/2008
• Section_Exhibit Name: Chapter II-B Operation Plan - Permit Area
• Media Type: D
• Archive: No

Chapter II
• Permit approval will be requested as the pile is
reaching the Phase III capacity.
(2) Sutey -Construction, Planning.
Planning for the waste pile concentrated on the geotechnical conditions of the
proposed site, control of surface water runoff and the detailed design of the refuse
pile.
Construction of the pile, which entails placement of the refuse, is done according to
federal/state coal waste pile design specifications, which require:
- Side slopes of the pile should not exceed 1 v:2h;
- The grade at the top of the pile shall not exceed 3%;
- Waste shall be spread in approximately horizontal
layers of not more than 24" thickness;
- The waste shall be compacted by the construction
equipment travelling over the surface of the pile;
- Compacted waste shall have a dry density of at least
90 percent ofthe maximum dry density.
- A bench will be constructed every 50' vertically that
will slope into the pile and have a maximum grade
• not more than 10%.
The drainage control plan was prepared by Geo-Hydro and is found in Ex.lI-B-App.S
A-1 through 11; hydrologic control structures are addressed specifically in Exh.
II-B-S-App.5-3,4,5,9 & 11. Also, sections B, C & D of Attachment 5 to App. II-B-7.
A berm and perimeter ditch, 8 to 10 feet from the toe, runs along the lower end of
the topsoil stockpile.
The access road was constructed by improving an existing, abandoned roadway
from the wash plant to a junction with the existing access road. This improvement
included widening of the road to a 30-foot width, surfacing with gravel, and the
reconstruction of a bridge at the creek crossing.
For sealing the Sutey exploration drill hole, Mid-Continent followed the following
procedure: The casing was cut off three feet below present ground, a spider
placed at 15 feet plus or minus, and the hole filled with concrete. The general area
was be backfilled and graded, to be covered over by the coal refuse fill.
In preparing for Phase II, Mid-Continent retained Golder & Assoc. to review the
sediment pond design for adequacy, and any necessary modifications.
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