2001-02-09_REPORT - C1981025 ‎(2)‎

• Permit No: C1981025
• IBM Index Class Name: Report
• Doc Date: 2/9/2001
• Doc Name: 2000 Annual Hydrology Report ‎(Memo)‎
• From: Byron Walker
• To: File
• Annual Report Year: 2000
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

999
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver,Colorado 80203 D I V I S I O N O F
Phone:[phone] [MINERALS
FAX:[phone] &
GEOLOGY
RECLAMATION
Interoffice MEMORANDUM MINING•S A F E T Y
Bill Owens
to: File C-81-025, North Thompson Creek Mines, 2000 Annual Hydrology Reot>ttnor
from: Byron G. Walker. L,/' Greg E.Walther
Executive Director
subject: Review for Compliance, 2000 Annual Hydrology Report (AHR) Michael B.Long
date: February 9, 2001 Division Director
Rule 4.05.13(4)(b): Ground water and surface water data collection shall be based upon a water
year(October I through September 30), unless otherwise approved by the Division.
The Division has approved submittal on a calendar year basis [Permit Application Package
(PAP) page 4-122].
Rule 4.05.13(4)(c):A hydrologic report shall be submitted to the Division annually withh the date
of submittal determined in consultation with the permittee. The annual hydrologic report shall
contain at a minimum:
The date of submittal of March 30 is stated in the PAP(page 4-122). The report was submitted under
a MINREC, INC. letter of January 2, 2001 and received in the Division of Minerals and Geology
(Division) on January 5, 2001.
Rule 4.05.14(4)(c)(i): Water quantity data obtained from each monitoring site during the water
year•,
Water quantity data was submitted by calendar year in-lieu-of water year. .
Groundwater quantity data of the monitoring program is limited to quarterly measurements of water
level in Wells D-IA and D-2A (PAP page 3-61). These data are reported in compliance with the
permit. Although monitoring of water levels in Mine 3 was discontinued(piezometers PZ-2 and PZ-
3)by previous revisions, mine water levels are included in the report (Appendix III). Measurements
were taken on 06/30 and 09/21/00 through an opening into the mine (Monitoring Hole 8).
Discharges of mine water are included in surface water monitoring. Surface water quantity
monitoring requirements include those of the Colorado Permit Discharge System (CDPS) permit
(PAP page 3-86). The combined total of flows from Mine 1 and Mine 3 are reported, starting in
August of 1995, in compliance with a change to the CDPS permit. The report states (page 5) that
there were no discharges from sedimentation ponds [at CDPS outfalls 002 (Sediment Pond P-9) and
005 (Refuse Pile Sediment Pond)]. Copies of Discharge Monitoring Reports are included in the