PERMFILE106811

• Permit No: C1980005A
• IBM Index Class Name: Permit File
• Doc Date: 1/26/2005
• Section_Exhibit Name: Tab 12 Operation Plan
• Media Type: D
• Archive: Yes

• SCC has two Petroleum Contaminated Material Stockpiles locations: as initial
stockpile area below the PECOCO impoundment, and another area adj aceat to the
Solid Waste Disposal area (as shown oa Exhibit 12-1, Operations Plaa). SCC
will use two petroleum contaminated material stockpiles. Oae area will be
used for landfarmiag the petroleum contaminated material (primarily soil)
while the second area will be used for final disDOSal. Landfarmiag reeucee
the petroleum coaceatrations by microbial action and by ^bakiag^ is sunlight.
Whoa the concentration of total petroleum hydrocarbons (TPH) is the
contaminated material is leas than 500 mg/kg, the material is placefl is the
Solis Waste Disposal area. Berms ere constructed around the stockpile areas
to refluce surface water run-oa and to contain surface water runoff.
The Colorado Department of Public Health anfl Bnvironmeat, Hazardous Materials
and Waste Maaagemeat Division (HI9W6ID) regulates landfills. Za the HMWMD's
^Regulations Pertaining to Solifl Waste Sites and Facilities, Part 1^ (6CCR
1007-2) an exemption to obtaining a "certificate of Deaignation^ is granted
to mines Dermittefl by the CMLRH (see section 1.6.2).
9.19.111) HACKFILLING AND GRADING
9.19.111) Timing of Backfilling and Grading. The Seneca II Mine, according to the
regulations, is considered an area strip mine. Rough backf illing and grading
• will be completed within 180 days following coal removal and will not be more
than four spoil ridges behind the active pit. Please see Page 13-99 for
further discussion of this topic. Home minor areas approximately 100 feet
each side of the haul road ranq~s may be delayed to allow grading to occur
with the reclamation of the ramp. This will allow the blending of the spoil
to a landform compatible to the approximate original contours Isee Exhibit
12-9). The backf illing and grading schedule (along with topsoil variance
areas) are shown on Exhibit 13-2, Sackf illing and Grading Scheflule, and
further described in Tab 13. Haulage and road access that will be retained
as Dermanent roads will be final graflefl and reclaimed is 2005. The
office/ahoD facilities area will not be final graded anfl reclaimed until
2012. The Petroleum Contaminated Material Stockpile and the sol ifl waste
disposal area are also scheduled for final grafting anfl reclamation is 2012.
These two areas serve ae material disposal eitea for ongoing shop maintenance
operations. The schedule for reclaiming these facilities is dependent uDOn
the completion of all final reclamation activities at the Seneca II-W and
Yoast Mines. They need to remain operational until all of 3CC's heavy
equipment has been removed and there are no longer any mine management or
vehicle maiateaance activities.
4.14.112) Method of Backfilling and Gradin g. All areas within the five-year permit
application to be disturbed by surface coal mining operations will be
• returned to approximate original contour as shown on Exhibit 12-9, Poatmining
Contour Map. Most spoil will be "side cast" by a dragline into the adjacent
open
TR-36 12-53 Revised 11/04