2012-08-13_REVISION - M1982090 ‎(2)‎

• Permit No: M1982090
• IBM Index Class Name: REVISION
• Doc Date: 8/13/2012
• Doc Name: TR-04 SUBMITTAL
• From: REARDON STEEL
• To: DRMS
• Email Name: RCO
• Media Type: D
• Archive: No

TECHNICAL REVISON, CAMP BIRD MINE 112 PERMIT (PERMIT NO. M- 1982 -090)
Introduction
Camp Bird Colorado, Inc (CBCI) is in the process of completing a number of permanent improvements to
portions of its private property that occur within the boundary of the Camp Bird Mine 112 permit (Permit
No. M- 1982 -090) (hereinafter referred to as the "112 permit "). These improvements include renovating
the historic homes located adjacent to the access road, renovating the bridge crossing Imogene Creek,
installing barriers and gates to regulate foot and vehicular access through CBCI's property, placing
"Private Property" signage along the perimeter of the property, and repairing utilities that service the
historic homes. All of these improvements are being completed as part of CBCI's regular maintenance
and upkeep of its property, and these tasks need to be completed regardless of future mining activities.
CBCI is including this paragraph in this submittal to provide courtesy notice to the Division of
Reclamation Mining and Safety (DRMS) that these tasks are currently underway. All of these
improvements will be completed in a manner that does not affect the current conditions of the 112 permit.
In addition to the regular maintenance and upkeep, CBCI desires to re- establish access to the Camp Bird
Mine through the 14 level (14L) of the mine. In order to do so, CBCI has identified six essential tasks
that need to be approved by DRMS, will affect the current conditions of the 112 permit, and therefore fall
within the scope of a Technical Revision (TR). These six tasks are listed below and correspond with the
numbered sections of this submittal:
1. Summarize the baseline hydrologic setting and implement a water quality monitoring plan
2. Reconstruct the historic sedimentation pond
3. Install discharge conveyance pipe from the portal to the sedimentation pond
4. Re -grade staging areas and erect an equipment storage building
5. Excavate and stabilize the collapsed 14L portal and rehabilitate the 14L drift
6. Revise the reclamation plan and adjust the financial warranty
Section 1.0 Hydrologic Setting and Monitoring Plan
The 14L water discharge daylights at the toe of the collapsed 14L portal (Photo 1). As a result, activities
related to excavating and stabilizing the portal will be in direct contact with the discharge for a limited
time. No water quality impacts to the discharge are anticipated, however to ensure that surface water
resources are not affected by these activities, CBCI intends to route the discharge to a sedimentation pond
prior to its release into Imogene Creek. Prior to activities that could affect the discharge, it is important
for CBCI to understand the baseline hydrologic setting, and to use the baseline characterization as a basis
from which to compare /monitor the hydrologic setting in the future.
Section 1.1 Baseline Hydrologic Setting
Given the extensive working history and relatively recent activity at the 14L, water quality data is readily
available to determine baseline hydrologic conditions. Water discharges from the 14L portal were
previously authorized under Colorado Discharge Permit System (CDPS) Number CO- 0026981. The
discharge permit was issued by the Colorado Department of Public Health and the Environment — Water
Quality Control Division (WQCD) pursuant to the National Pollutant Discharge Elimination System
program administered by the Environmental Protection Agency. The CDPS permit was originally issued
Technical Revision, Camp Bird Mine 112 Permit (Permit No. M -1982 -090) Page 2