2011-11-17_REVISION - M1981185

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 11/17/2011
• Doc Name: Partial approval with conditions ‎(CN-01)‎
• From: DRMS
• To: R Squared Incorporated
• Type & Sequence: CN1
• Email Name: WHE
• Media Type: D
• Archive: No

Approved Activities
May Day Idaho Mine Complex, M- 1981 -185
4. The Operator may construct ground water monitoring wells at approved locations and
commence the characterization of ambient hydrologic conditions for ground water at
the site. The approved locations are indicated on Figure G -1, Surface and Groundwater
Sample Locations, dated October 10, 2011, with the exception of LP -1. LP -1 is
appropriately located on the east bank of the La Plata River, but should be moved
further east and as close as possible to the property boundaries for Taylor and Linden,
but remain within the approved boundary of affected lands. Necessary equipment may
require a drill rig.
5. The Operator may install storm water control structures (BMPs), as necessary to comply
with the SWMP and the requirements of EPA, Corps of Engineers, WQCD, and La Plata
County. Necessary equipment may include a backhoe or tracked excavator.
6. The Operator may remove mining related debris from Little Deadwood Gulch and
stabilize the drainage channel proximal to the May Day 2 level, as necessary to comply
with the SWMP and the requirements of EPA, Corps of Engineers, WQCD and La Plata
County. Necessary equipment may include a backhoe or tracked excavator, truck(s) to
deliver culverts and riprap materials, and grizzly to sort materials on -site to acquire
appropriate riprap materials.
NOTE: The Operator has not yet attained DRMS approval of the work plan addressing
the removal of mine debris from Little Deadwood Gulch and stabilization of the drainage
channel proximal to the Chief Portal. DRMS has required total removal of all
inappropriately placed materials from the drainage channel at Chief Portal, but the
Operator has counter - argued removal of all materials will destabilize the Chief Portal.
DRMS has required the Operator to demonstrate how total removal of the obstruction
to Little Deadwood Gulch would destabilize the Chief Portal. The Operator has
requested, and DRMS has approved, this issue to be resolved through follow -up
Technical Revisions and /or Amendments, to be submitted subsequent to the issuance of
the partial approval with conditions. This issue is not yet resolved and the Operation is
not authorized to implement unapproved designs.
The above issues were discussed with the Operator on November 16, 2011. The, Operator
requested to include a front end loader, or wheel loader, to the equipment list. The request to
include a front end loader is approved. All other activities discussed during the November 16,
2011 meeting, and not specifically listed above, must be submitted in writing for Division
review and approval.
Therefore, the list of heavy equipment necessary to accomplish the limited activities currently
approved by DRMS include the following:
• Drill rig for geotechnical information;
• Drill rig for ground water monitoring wells;
• Backhoe and /or tracked excavator;
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