2015-06-30_HYDROLOGY - C1981010

• Permit No: C1981010
• IBM Index Class Name: Hydrology
• Doc Date: 6/30/2015
• Doc Name: Mid Term Review Memo Surface Water Hydrology June 2015
• From: Robin Reilley
• To: Tabetha Lynch
• Permit Index Doc Type: Other Surface Water
• Email Name: RAR
• Email Name: TNL
• Email Name: DIH
• Media Type: D
• Archive: No

I was assigned review of Trapper Mine permit against the following rules:
2.04.7 (2)
2.04.8(1)-(3)
2.05.3(4)(a -d)
2.05.4(2)(h)
2.05.6(1)(3)(ai-aiii), (bi-v)
4.04(1)(b), (2)-(4)
Mitigation of Impacts
Support facilities
4.05.2(1)-(8)
4.05.5(1)-(2) Sediment control
4.05.6(1)-(7)
water quality and
Sed ponds modeling
effluent limits
and reclamation
4.05.7 DQ and
4.05.9(1)-(21) Impoundments
4.05.13(2)
erosion prevention
design, maintenance
stabilization, inspected
My review of the permit with respect to these Rules follows. Adequacy review
questions are bulleted (*).
Rule: 2.04.7 (2) Hvdroloav Description/Conditions
This is a review of the surface water related sections of the Hydrology Conditions
and includes:
a. Surface water flow rates.
b. Water quality information.
c. Waterbody locations and discharge into water bodies.
Permit Vol. II section 2.7.4 discusses baseline pre mine, surface water conditions
and provides a copy of the Discharge Permit (CO -0032115).
Tables 2.7-15 to 18a provide the water quality and sampling analysis required by
rule 2.04.7(2)(b)(ii). Table 4.8-8 provides operational surface water monitoring
results from 1977 through 1980.
The surface water information required by Rule 2.04.7 (2) has been adequately
provided and includes:
a. Name of watersheds receiving discharges from permit area, location of all
surface water bodies. Maps M30 M50, M51 and M52 (Appendix Q) show
the required hydrologic information and are consistent with requirements
of Rule 2.10 Maps and Plans.
b. A description of the protocol for water quality sampling, analysis and
reporting, and seasonal information on quality.
C. Surface water quality data resides in Appendix C, 2011 AHR with monthly
sampling of Temp, flow, pH, Conductivity, TSS, Sedsol, TDS, Fe, and Al
for NPDES sample points 002 through 024 and site S-1 Flume Gulch and
the parameters below.
o Total dissolved solids or specific conductance corrected to 25° C
Trapper Mid Term Review Prepared by: R. Reilley Page 1
Date: June 2015 Document Location: M\\Coal\rar\MidTermReviews