2008-11-24_PERMIT FILE - C1996083A ‎(14)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 11/24/2008
• Section_Exhibit Name: 2.04 Information on Environmental Resources
• Media Type: D
• Archive: Yes

2.04.7 Hydrology Description
•
Water Right Summary
Water Right Spring/Pond Designation Decree Date Owner
Hubbard Creek 1.25 Miles Instream 0.011 CFS 12/31/1882 BLM
Terror Creek 2.5 Miles Instream 0.012 CFS 12/31/1882 BLM
There are four unnamed, generally east to west flowing, ephemeral gulches
which are tributary to Terror Creek within the permit and adjacent area. These
gulches are expected to be typically dry with flow occurring during spring
snowmelt and after significant precipitation events. On the west facing slope of
Terror Creek, the unnamed west to east flowing ephemeral gulches which are
tributary to Terror Creek are not currently within the long term mine plan area.
•
Stephens Draw bisects the southwestern portion of the permit area. It is
characterized by steep to nearly vertical canyon walls. This Draw is an
intermittent stream with greatest flow to be expected during spring snowmelt and
significant precipitation events. Stockpond P-1 is located in Stephens Draw in
the southwest corner of the permit area. Monitoring performed during 1984
shows this pond had discharge that ranged from 3 to 20 gallons per minute. Flow
monitoring for Stephens Draw immediately below the pond show flows ranging
from a seep to 1.58 gpm for the period of September 1995 through September
1998.
Four unnamed ephemeral drainages are located within the permit area between
Stephens Draw and Hubbard Creek. From west to east they are named A-Gulch,
B-Gulch, C-Gulch and D-Gulch. These gulches would only be expected to have
flow during spring snowmelts and significant precipitation events. During 1995
and 1996 no discharge was observed from these drainages.
Stockponds Within Permit and Adjacent Area:
Numerous stock ponds, all having a storage volume less than 20 acre-feet, have
been identified within the permit and adjacent area. These ponds are man-made
and historically serve as stockponds. Limited domestic stock use has been made
of these ponds in recent years. The ponds are sited to collect run-off during the
spring season and some are located to accumulate flow from colluvial springs
and seeps. Although the ponds are a significant hydrologic feature of the permit
area and their existence is currently important to wildlife, total contribution of
these ponds to the local water budget is not significant.
Surface Water on Mine Site:
Surface water runoff associated with the surface operations is controlled by the
drainage plan. All surface runoff is either routed through sedimentation ponds or
treated with some form of alternative sediment control.(b)(i) Minimum, maximum,
and average flow data identifying seasonal variations of low flow and peak
discharge rates are presented in this section and in Volume III, Exhibit 3.

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2.04 - 34 - 09/26/08