1997-03-28_HYDROLOGY - M1977378

• Permit No: M1977378
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/28/1997
• Doc Name: Backfill Borrow Areas for Howardsville Mill.
• From: DMG
• To: Sunnyside Gold Corp
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

. _ II I 'II I II I II'lll 'll
999
5TATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources pprt
1313 Sherman St, Room 215 RECEIVED
Denver,Colorado 80203
Phone.[phone]
FAX [phone] APR 071997
DEPARTMENT OF
� 1 NATURAL
March 28, 1997
Division of MlnOrtilm at�dp,a9r RESOURCES
Larry Perino co ernnoer
R'unnyside Gold Corporation James Lochhead
P.O. BOX 177 Executive Director
Silverton CO 81433 Michael B Long
� Division Director
RE: Backfill Borrow Areas for Howardsville Mill, Permit No. M-84-049,
Sunnyside Mine', Permit N'o. M-77-378, Consent Decree, Sunnyside Gold Corp.
Dear Mr. Perino:
In response to your inquiry regarding locations of material borrow areas for the
Howardsville Mill, I have enclosed a copy of a portion of Exhibit C map. Locations for
rockfill and backfill borrow areas are highlighted in blue. During our conversation, you
had also inquired whether capping material for the Howardsville Mill Lower Tailing Pond
could be salvaged from the embankments for the existing overflow ponds. Overflow
pond embankments are highlighted in yellow.
Permit documentation for the Howardsville Mill indicates that the overflow ponds existed
prior to permit issuance, but does not describe the overflow ponds sufficiently to clarify
their original purpose. Permit documentation state that the embankments were
constructed from alluvial and colluvial material. Reclamation Plan states that the
embankments will be graded level and seeding during final reclamation.
The overflow ponds do not appear to assist mill operations. Rather than providing a
hydrologic benefit, the overflow ponds may neutralize the result of the upland diversion
ditch, by impounding drainage and increasing the elevation of alluvial flow under the
permitted tailings ponds.
Subsequent to operator approval, DMG could approve utilization of the overflow pond
embankments for cover material over the Lower Tailings Pond.
Sincerely,
Wallace H. Erickson
Environmental Protection Specialist
cc: Jerry Sandell, TUSCO
Joe Baldwin, P & G Milling & Mining