PERMFILE131449

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 5/23/2003
• Section_Exhibit Name: Exhibit 14 Hydrologic Monitoring Plan
• Media Type: D
• Archive: Yes

RECEiVE®
AUG 19 2001
Division of Minerals and Geology
and then quarterly, except 008-A V-l, for water quality. The specific sampling schedule for all of the ground
water monitoring wells is described within Table A, Hydrologic Monitoring Sites, while Table B, Hydrologic
Monitoring- Parameter List, describes the constituents to be analyzed.
When the water level measurements are obtained in the alluvial wells, the water level of the adjacent stream will
also be determined using a staff gauge or other similar measuring device, except when snow and ice conditions
preclude these measurement. The staff gauges have been and will continue to be surveyed following installation
to ensure an accurate assessment of the stream elevation. The surveying will be done on a three-year interval,
beginning in the year 2000, unless physical damage to the gauge occurs prior to that time. Each active staff gauge
will be surveyed according to this schedule. Typically, the surveying will de done in the spring or early summer,
unless field conditions precludes this work.
During the late fall and winter months, snow and ice buildup on the stream or measuring device preclude an
accurate assessment of the stream elevation. For this reason, stream water levels are generally obtained from late
March/early April through September. The water level measurement sites are listed on Table A, Hydrologic
Monitoring Sites.
For all wells, water levels will be measured using a standard level probe or pressure gauge before pumping or
bailing of the monitoring well or allowing it to flow for period of time. Measurements will be made relative to a
consistent datum, such as the top of the well casing. Pumping or bailing of the wells prior to water quality
sampling will be done to ensure that water standing in the well bore is removed; thus, representative field
readings and water quality samples can be obtained.
Surface Water, Effluent, and Spriug Monitoring
Monitoring Requirements. Surface water monitoring will document the quantity and quality of area stream
flows, the discharge from sedimentation conVOl ponds, mine water discharge, and the quantity and quality of
springs. Monitoring sites and sampling frequencies are set forth in Table A, Hydrologic Monitoring Sites, and in
TTPDES Permits CO-0027154, CO-0036684, and CO-0042161. Site locations are shown on Map 13A,
Hydrologic Monitoring Plan. Table A specifies two general categories of sampling frequency, "Regular"
monitoring that is done continuously, and "Contingent" monitoring that is done only when there is a discharge
from underground mine pumping. The precise timing of all sampling may vary somewhat from Table A due to
weather conditions.
IVPDESPermits. Copies of the AIPDES permits are located in the mining and reclamation permit in E.xttibit 30
(Volume III), Exhibit ]0 (Volume Vlll), and in Exhibit 44 (Volume IIIA). Data from the NPDES discharge
points will be included with the Annual Hydrologic Report. Copies of the Discharge Monitoring Report are also
forwarded to DMG. The NPDES permits establish effluent limitations for discharges from the following three
parts of the mine:
a) Permit CO-0027154 -Discharge associated with Ponds $, C, D, E, F and T;
b) Permit CO-0036684 -Discharge from Pond E at the Fish Creek Tipple; and
c) Permit CO-0042161 -Mine water discharge at the Fish Creek Dewatering Facility.
USGS Stream Monitoring Stations. The USGS has established continuous stream-flow monitoring stations
along Foidel Creek. The operation and maintenance of the USGS stations aze planned to continue throughout the
life of the mine. TCC may take over these stations in the future depending upon status of agreement with USGS.

TR 01-38 Exhibit 14 - 2 8R8/01