GENERAL54078

• Permit No: M1994117
• IBM Index Class Name: General Documents
• Doc Date: 4/23/1996
• Doc Name: LAND APPLICATION SYSTEM GOLD HILL MILL OPERATOR COM INC PN M-94-117
• From: DMG
• To: EVAN FREIRICH
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Depanment of Nalu ral Resources
1313 Sherman St., Room 215
Denier, Colorado 80203
Phone [phone]
FAY: (3031 83?-8106
DATE: April 22, 1996
TO: File No. M-94-117
FROM: Allen Sorenson ~~
~I~~~
DEPARTMENT OF
NATURAL
RESOURCES
Ruy Romer
Gueernor
lames S Lochhead
Executive Director
RE: Containment of Ground Water Iaf loxa to the Hazel-A Micnae~B. long
Adit, Coliaa Oro Molino, Inc., Gold Hill Mill, Division Director
Permit No. M-9~-117
Voice mail message from Ric Fanyo, Attorney for COM, Inc., received
4/12/96 at 9:15 a.m., and follow-up discussion at - 1:30 p.m.:
COM, Inc. inspection of Hazel-A adit on afternoon of 4/11/96 revealed that
ground water inflow from the back (roof) of the Hazel-A adit was occurring
at a location outby of the coffer dam/pump-back system. This was
described as a significant ground water inflow stream relative to the
dripping that has been observed inby of the coffer dam. The ground water
inflow originates from a geologic structure (fracture or small fault), and
is not related to the borehole that serves as a conduit for piping and
electric lines into the adit. This recently developed ground water inflow
(this inflow was not occurring at the time of the Division's 4j2j96
inspection) had filled the depression in the sill of the adit that is
present between the portal hatch and the coffer dam, and had resulted in
a discharge of water outside the portal hatch. In response to this
situation, Mr. Fanyo stated that a sump pump would be installed in the
depression in the sill outby of the coffer dam, and any water collected
there would be pumped back behind the Hazel-A bulkhead. It is the
Division's position that the water discharged from the Hazel-A adit in
this instance was not a result of any failure of the approved bulkhead,
coffer dam, or pump-back system. It is also the Division's opinion that
operation of a sump pump outby of the coffer dam will be sufficient to
contain the ground water inflows within the adit. The burden is on COM,
Inc. to maintain the Hazel-A adit in a zero-discharge configuration.
Voice mail message from Ric Fanyo, Attorney for COM, Inc., received
4/12/96 at 6:30 p.m.:
Mr. Fanyo reported that a sump pump had been installed in the depression
in the sill outby of the Hazel-A coffer dam, and that this installation
was proving to be sufficient to prevent discharge from the Hazel-A adit.
Carl Mount inspected the Hazel-A adit on 4/18/96 and verified that the new
sump pump was operating as described.
cc: Ric Fanyo (via facsimile)
Carl Mount, DMG
Kathy Sullivan, WQCD (via facsimile)