1995-05-16_REVISION - M1977378 ‎(2)‎

• Permit No: M1977378
• IBM Index Class Name: REVISION
• Doc Date: 5/16/1995
• Doc Name: Discussion Items for May 17, 1995 Meeting, FAX.
• From: CDPHE-WQCD
• To: DMG
• Type & Sequence: TR14
• Media Type: D
• Archive: No

05/16/1995 13:02 303-782-0390 CDH WQCD WQCC PAGE 02
STATE OF COLORADO
Roy Romer,Governor
Patti Shwayder,Acting Executive Director
Dedicated to protecting and Improving the health and environment of the people of Colorado
4300 Cherry Creek Dr.S. Laboratory Building
Denver,Colorado 80222-1530 4210 E.1 nth Avenue
Phone[phone] Derwer,Colorado 80220-3716
[phone] C,&tmdo Depam=t
Of Publicfhalth
May 12, 1995
Mr.William B. Goodhard
Resident Manager
Sunnysidc Gold Corporation
P.O. Box 177
Silvertonn,CO 81433
RE: Y Discussion Items for May 17,1995 Meeting
Dcar Mr.Goodhard:
In order to facilitate our discussion on May 17,we felt that it would be advantageous to provide a listing of those
areas which still need discussion or those technical items where the Division has questions and seeks clarification.
The purpose of this letter is to provide you with this information. The following is a list of items which need
discussion:
Treatment of Cement Creak
It is the Division uadoratanding that Sunnyside Gold Corporation and Eck Bay Mines("SGC')have committed to
treatment of Cement Creek in an effort to provide a loading deficit in the stream to absorb the anticipated increased
loading from the plugging of the American Tunnel. This concept is acceptable to the Division We do,however,
mead to better understand how the system you proposed will work Could you please provide us with an explanation
of how this will physically be accomplished. In particular, how will the decision be made on the total quantity of
flow to be diverted. What is the anticipated loading removal that SGC is expecting by the diversion and treatment
of C ment Creek? We assume that the zinc loading to be removed from Cement Creek will be equal to the
anticipated loading from the plugging.(See January 13, 1995 letter to Mr.William Goodhard from the Division for
possible loading scenarios.) Has SGC evaluated whether there is sufficient loading in Ccmcat Creek at the point of
the American Tunnel to balance the anticipated loading? Our quick calculations would indicate that it may be
difficult to meet the most optimistic scenario under some low flow conditions. What is the expected quality of the
discharge from the combined system? Will the treatment system be capable of handling the flow both hydraulically
and chemically?
The proms used to decide when to cease treatment of Cement Creek needs to be further developed. Such a decision
should include some level of input from both the Division and Division of Minerals and Geology.