2015-03-09_PERMIT FILE - C1981012A

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 3/9/2015
• Section_Exhibit Name: Section 2.05 Operation and Reclamation Plan
• Media Type: D
• Archive: Yes

K11
Mine. Exhibit 40 Jansen Load out contains a detailed description of all facilities and
associated modifications related to the load out facility. In general, a retaining wall,
truck weight station, feed hopper, conveyor belt, and load out bin will be constructed.
This load out facility will be temporary and will be used in an interim period until
NECC can complete construction of the railroad to the mine. It is anticipated that
this temporary load out facility would be used until 2012.
(4) Ponds, Impoundments and Diversions
The Sediment and Surface Water Control Plans are shown on Maps 13 and 14 for the
East Portal and West Portal respectively. The Operator submitted these plans as a
technical revision to the permit. These revisions have been necessary because of
preparation plant construction; refuse area construction, and the need for more
efficient routing of disturbed water as well as ease of maintenance of the overall
drainage system. The area north of Ditches D11, and D19 to the Highway 12
easement were graded, covered with subsoil and topsoil, mulched and seeded during
August and September of 1990.
The Operator has three sediment ponds, which collect surface disturbance runoff
from the East Portal area. These ponds are 004, 007 and 008. A fourth pond, pond
005, was reclaimed in 2003, as the area serviced by this pond was never used for
mining related activities. These sedimentation ponds and associated diversion ditches
have been designed according to Section 4.05.6 of the DRMS Regulations. In
addition, the diversion structures have been designed utilizing the requirements of
4.05.3 and 4.05.4. Typical sections of the emergency spillways and embankments of
each sediment control structure are shown in Figure 3, Typical Embankment Cross
Section. Typical diversion sections are provided on Map 13 Sediment and Surface
Water Control Plan- East Portal. Table 20, Ditch Data, is a summary of the diversion
(ditch) data relating to Map 13. Table 21, Culvert Sizing and Figure 23, Culvert
Sizing Nomograph, provide backup for culvert sizing as per requested drainage
modifications. Table 23, Sediment Pond Dimensions, is a summary of sediment pond
dimensions.
The Operator will control West Portal drainage using ditches, containment areas and
bypass culverts. All structures are shown on Map 14, Sediment and Surface Water
Control Plan -West Portal. Calculations are found in Exhibit 19, Sediment Design
Specifications.
Runoff from the DWDA #3 is routed through a series of diversion ditches and will be
routed to Containment Area No. 2. The sedimentation control plan for the DWDA
#3 is contained in Exhibit 19(22) and was evaluated based on the 100 -year, 24 -hour
event. Runoff from the undisturbed upland areas to the west are diverted around the
pile in ditch D49. Runoff from a small - undisturbed upland area east of the pile is
routed through the diversion ditches and routed to containment area 2.
Ditches 27 and 69 will direct runoff to Containment Area 2. Containment Area 2 has
been designed to contain the 25 -year, 24 -hour event, per Rule 4.05.9(2)(e) and as
Section 2.05 TR -70 03/02/2015