2001-03-14_REVISION - M1977378

• Permit No: M1977378
• IBM Index Class Name: REVISION
• Doc Date: 3/14/2001
• Doc Name: Stipulations for Approval
• From: DMG-Allen
• To: DMG- Wally
• Type & Sequence: TR25
• Media Type: D
• Archive: No

III IIIIIIIIIIIIIIII
999
5TATE OF COLOMDO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver,Colorado 80203 D I V I S I O NA O F
LSNERPhone.[phone] M I FAX:[phone]
GEOLOGY
RECLAMATION
DATE: March 14, 2001
MINING-SAFETY-'TO: Wallace Erickson G Owens
Governor
Greg E.Watcher
FROM: Allen Sorenson Executive Director
444 Michael B Long
Division Director
RE: Stipulations for Approval,Sunnyside Gold Corporation,Sunnyside Mine,
Technica Revision TR-0?5,Permit No.M-1977-378
Stipulation No. 1
The degree of irregularity of the blasted surface of the tunnels through the reach of the proposed concrete
bulkheads, after the scaling and washing operations,must be quantified and shown to be sufficient to
prevent shear failure along the concrete-rock interface under the applied hydraulic thrust and in accordance
with the design criteria for irregularity specified in the TR-025 application.
Stipulation No. 2
The Division of Minerals and Geology will require that a copy of all documents related to technical revision
TR-025 be placed on permanent file (recorded) with the San Jaun County Clerk and Recorder and that
Sunnyside Gold provide an affidavit or receipt indicating the date on which the documents were placed with
the county clerk and recorder. A permanent filing is deemed necessary in the case that any activity that may
take place in the area in the distant future may require reference to the plans and designs for the bulkheads,
and a filing with the county clerk is seen as the best way to ensure that the information will be available.
Stipulation No. 3
American Tunnel Bulkhead No. 2 will be provided with a sampling port that will allow measurement of
hydrostatic pressure behind the bulkhead and will allow samples of the impounded water to be collected
for analysis. Bulkhead No. 2 will remain accessible for inspection and monitoring until it can be
demonstrated that the bulkhead's performance is acceptable. The demonstration of acceptable
performance must include, but may not be limited to:
• Engineer's construction report and certification that the bulkhead was installed in accordance with
the approved design and specifications. The construction report will include documentation of
pertinent observations during construction, listing of the results of quality control and quality
assurance tests, and a discussion of any problems encountered during construction and their