1996-05-06_REVISION - M1977378

• Permit No: M1977378
• IBM Index Class Name: Revision
• Doc Date: 5/6/1996
• Doc Name: Cement Creek Diversion and Water Treatment and Alkaline Injection
• From: Sunnyside Gold Corp
• To: DMG
• Type & Sequence: TR19
• Media Type: D
• Archive: No

TR-019 Request
Page 2
MINING PLAN
Cement Creek Diversion
This project involves the temporary diversion and treatment of
waters from Cement Creek. Treatment will be provided by the
existing American Tunnel water treatment facility. Diversion
into this facility will require the construction of a
diversion headgate in Cement Creek and a gravity system to
transport the water to be treated to the existing reagent feed
building.
Construction of the diversion system will entail the
excavation of a graded roadway along the east bank of Cement
Creek to a point where the graded roadway intersects the
Cement Creek stream channel and the diversion structure can be
constructed. The target roadway grade will be 2% - 4%.
Within the roadway will be buried a corrugated polyethylene
pipe to carry the diverted Cement Creek water into the
treatment system. Any excess diverted water that will not be
taken into the treatment system will be diverted back to the
stream channel at the reagent feed building. Treated water
will reenter the stream channel at the discharge of the
treatment system through SGC's CDPS permitted discharge point
AT-004.
All planned work for this project is within the permit area
for the American Tunnel. The permit boundary was expanded
through AM-004 to accommodate this project. Construction will
start after the Consent Decree and Order negotiated with WQCD
is formally accepted by both parties and the District Court,
City and County of Denver, State of Colorado that has
jurisdiction over SGC's Complaint for Declaratory Relief
against WQCD. This will be a voluntary settlement without
litigating the issue of responsibility for permitting seeps
and springs that may emerge or increase in flow as a result of
closing the valves on the bulkheads.
The new disturbance required will be less than 0.5 acres for
the access road/pipeline bench. Since it will be excavated
along a sidehill that undisturbed has 2:1 slopes, the cut-fill
access road slopes will range from 1:1 to 1 :5:1. For a 12'
wide access, it will require a new disturbance of 20'-30' wide
by approximately 4001 . See enclosed map.
This diversion and treatment of Cement Creek will continue
until no longer needed to maintain water quality as defined in
the Consent Decree or is terminated under terms of the Consent
Decree.