GENERAL37207

• Permit No: M1994117
• IBM Index Class Name: General Documents
• Doc Date: 6/19/1995
• Doc Name: FAX COVER
• From: DMG
• To: COM INC
• Media Type: D
• Archive: No

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Gold Hill Mill Adeouacv 2 June 20. 1995
along with any supporting documentation.
3. The Division can permit the site without requiring bond for mill
building demolition and reclamation at this time. If at some point
Boulder County notifies the Division that the mill building cannot
remain as a beneficial post-operational feature under local zoning
regulations, the bond will have to be increased to cover the cost of
building demolition and removal and building site reclamation.
4. It is clear based on observations made during the Division's 6/7/95
inspection report, that the Gold Hill Mill water management plan, as
it is described in the application and as it is operated at the
site, is not sufficient to prevent discharges of tailing pond water
to Cash Gulch. A new water management plan must be provided in
order to gain application approval. A water balance must be
included that demonstrates that the mill can be operated as a zero
discharge facility, or, alternatively, COM, Inc. must obtain a CDPS
permit from the Health Department that allows discharge to Cash
Gulch.
5. Please specify the minimum height to which the decant risers will
extend above the tailing surface (if, in fact, the risers remain a
component of the water management plan), and describe what methods
will be employed to prevent the risers from becoming plugged with
snow or debris.
6. Please provide a commitment to conduct quality assurance testing
during embankment construction and liner installation, and to
provide documentation of test results to the Division in the form of
as-built certification reports. Provide a list of the types of
testing that will be completed (e.g. proctor tests, and
moisture/density tests for embankment materials), and commit to a
minimum frequency at which these tests will be conducted.
7. It is the Division's view that the Gold Hill Mill permit could be
issued upon application approval and submittal of a bond in the
amount of $38,277.00. This is the amount determined to be adequate
for the mill site under permit M-83-141. The amount of required
bond would be revisited at the time that tailing pond expansion is
initiated. Please commit to providing written notice to the
Division prior to initial site work related to tailing pond
expansion. The Division and Board reserve the right to revisit the
amount of required bond at any time for good cause shown.
8. The process water line from the Time Mine borehole to the mill was
installed in a trench and buried. Both the borehole and the buried
pipeline are disturbances that must be reclaimed, and as such must
be included in the permit area.
These issues must be addressed prior to permit application approval, and