PERMFILE67353

• Permit No: C1981022
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 2.06 Requirements for Permits for Special Categories of Mining
• Media Type: D
• Archive: No

Ste- 2.06.8
the amount of water consumed in the mining operations. It is estimated that total mine consumptive
• use will be less than 100 acre-feet per yEar, or the equivalent of a constant withdrawal rate of 0.14 cfs.
Given an average annual stream discharge for the North Fork of approximately 470,000 acre-feet per
yt az (based on an average annual flow rate of 650 cfs), total mine consumptive use represents
approximately 0.02 percent of the flow in the Nonh Fork, which is insignificant relative to the
quantityof water available for downstream rue.
Downstream water quality in the North Fork will be protected through OMI'S ongoing compliance
with applicable effluent discharge standards under their approved ®PS discharge permit. Normal
mine water discharge is expected to range from 0 to 400 gpm, depending on several factors including
ground water inflow rates, mine water useage rates, and available sump or other storage capacity. For
the mid-range of normal mine water discharge (200 gpm) and typical mine water TDS levek of 2,000
to 4,000 mg/1, discharge of mine water to the Nonh Fork during low flows (60cfs and average TDS
of 150) would theoretically increase stream TDS levels in the North Fork to approximately 178 mg/l,
which does not represent a significant increase. During the irrigation season when TDS levels are
potentially of greatest concern, flows in the North Fork are much higher, so potential water quality
impacts from mine discharge would be significantly reduced.
2.06.9 - Angering
Because the current mining operations are underground operations and any coal that could be
recovered by angering operatioru u weathered, degraded, and burned in outcrop/subcrop areas, OMI
has not and has no current plans to implement or conduct auger mining. The provisions of thu sub-
section are, therefore, not applicable.
2.06.10 -Coal Processing Plants and Support Facilities not Located Within the
• Permit Area
As they relate to OMI's ongoing underground mining activities, coal processing activities are limited
to screening and crushing of the run-of-mine coal to achieve a desired 2-inch minus coal product.
Both coal screening and crushing facilities and all other mine support and ancillary facilities are
located within the mine Permit Area. The only related facility located outside of the mine Permit Area
is the Terror Creek Loadout facility, which receives limited coal from the OMI and other mining
operations in the North Fork Valley. The Terror Creek Loadout is separately owned and permitted,
operating under approved Permit G83-059, as detailed in Section 2,03.4, Identification of Interests.
Because there are no directly-related process or other facilities located ouuide of the mine Perrnit
Area, the provisioru of this sub-section are not applicable.
2.06.11 - In-Situ Processing Activities
OMI has not and has no current plans to implement or conduct in-situ processing in conjunction
with or in lieu of ongoing mining and related operationu. The provisions of this sub-section are,
therefore, not apphcable.
•
PR04 2.06-5 Revised Augtsst 2000