2015-11-16_PERMIT FILE - C1981019A ‎(4)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 11/16/2015
• Section_Exhibit Name: 4.05 Hydrologic Balance
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
4.05.16 Discharge of Water into an Underground Mine
No surface water will be diverted into any underground mine workings.
4.05.17 Post -mining and Rehabilitation of Sedimentation Ponds, Diversions, Impoundments, and
Treatment Facilities
No treatment facilities are planned. Approved permanent sedimentation ponds, stock ponds, and
permanent diversions will be left in place. These structures will be maintained in an appropriate condition
before the Permit area is abandoned by repairing any necessary portions, cleaning sediment and debris
out, establishing appropriate vegetation and providing soil stabilization.
4.05.18 Stream Buffer Zones
In accordancd with Rule 4.05.18, no land within 100 feet, or greater if required by the Division, of a
perennial stream, an intermittent stream, or an ephemeral stream with a drainage area greater than one
square mile, shall be disturbed by surface and underground coal mining operations unless the Division
specifically authorizes surface or underground mining operations closer to, or through such a stream.
Additionally, the area not to be disturbed shall be designated a stream buffer zone and marked as
specified in Section 4.02.5.
The locations of the disturbances that have occurred within 100' of a stream buffer zone are described
below and are depicted on Map l OC.
Good Springs Creek
Two sediment ponds were constructed within 100 feet of Good Springs Creek. The sediment ponds
include Streeter Pond and Gulch A Pond. During construction (during the late 1970's and early 1980's)
and to date these ponds have not created any adverse impacts to Good Springs Creek. These structures
are not anticpated to have any long term impacts to Good Springs Creek.
Other structures have been constructed or previously existed within 100 feet of Goodsprings Creek and
they include Colowyo's access road off of Highway 13 where it crossing Goodsprings Creek and
Colowyo's guard shack. Colowyo constructed the access road to the mine and the guard shack at the
beginning of the Colowyo Mine. To date the access road and guard shack have not created any adverse
impacts to Good Springs Creek, and these very long term structures are not anticpated to have any long
term impacts to Good Springs Creek.
West Fork of Good Springs Creek
The access road to Secton 28 Pond off of Highway 13 was not a new disturbance when Colowyo began
using it to construct and access the Section 28 Pond. Rather it was premining, pre-existing "ranch" road
that accessed an old ranch home and surrounding valley area for the property. Colowyo made minor
upgrades to the road when the Sectoin 28 Pond was constructed. The majority of these upgrades were to
allow proper draining through swales across the road. To date the pre -mining ranch road and updagrades
have not created any adverse impacts to the West Fork of Good Springs Creek, and it is not anticipated
that this road will have any long term impacts either to the West Fork of Good Springs Creek.
Colowyo also has two surface water monitoring and two groundwater monitoring structures (flumes and
wells) installed within the stream buffer zone to the West Fork of Goodsprings Creek. This includes
LWFGSC, UWFGSC, A-7 and A-8 as presented on Map l OC. All four monitoring structures have not
and will not create any adverse impacts to the West Fork of Goodsprings Creek.
Rule 4 Performance Standards 4.05-18 Revision Date: 9/23/15
Revision No.: MR -145