2004-09-14_GENERAL DOCUMENTS - M1993041

• Permit No: M1993041
• IBM Index Class Name: General Documents
• Doc Date: 9/14/2004
• Doc Name: Compliance with Permit Stipulations
• From: Banks and Gesso LLC
• To: DMG
• Media Type: D
• Archive: No

®A G R A
Earth & Environmental
III 1111111111111111
999
~ECE~~lEL'
DEC 0 7 1994
December 5, 1994
Division of Micetals & Geo(og;
Mr. Bill York-Feirn
Colorado Division of Minerals & Geology
1313 Sherman St., Room 21 b
Denver, CO 80203
Subject: File No. M-93-041, Revision No. AM-001
Dowe Flats Mina, Southdown, Inc.
Response to Adequacy Comments
Sk\~~y~-
Dear Bill:

AGRA EaM 8
Environmental. Inc.
17301 W. Collax Avenue
suite 170
Golden, Colorado 80401
Tel [phone]
Fax [phone]
AGRA Project E94-7033
This letter responds to your adequacy comments dated November 28, 1994. Your comments
follow in bold type and our response is immediately thereafter in regular type.
1. Exhibit D -Please provide en update on how disturbed wetlands will be mitigated on the
Dowe Flats site. What is the status of Southdown, Inc: s application fora 404 permit with
the Army Corps of Engineers?
The entire project was initially designed to avoid wetlands disturbance. Recent leakage of the
St. Vrein Supply Canal created a linear stringer of wetlands in the central portion of the mine
in the vicinity of year 10 of the planned mining. As you know, Southdown cooperated with
the Northern Water Conservancy District to line the ditch and prevent future leakage. The
U,S. Army Corps of Engineers was consulted on the lining and had no difficulty. The lining
was successful; and we believe, with time, the only wetland in the mine disturbance area will
disappear. Southdown will remap this wetland prior to any disturbance, seek Corps
concurrence, and obtain necessary permits at that time, if required. There is currently rto
pending 404 permit and no plans to disturb any wetlands.
Is the Exhibit C-2 Map also a map of the maximum disturbance on the site during the life of
the minaT Are Exhibit L Reclamation Cost estimates based upon the Exhibit C-2 Map? Is the
maximum disturbance at any one time, therefore, 95 acresT
Exhibit C-2 does depict the maximum acreage of disturbance over the fife of the mine (i.e.,
95 acres). The reclamation costs in Exhibit L were calculated for the maximum disturbance
as you had previously requested on the original permit.
Will relocated County Road 47 be closed during 6lastsT Are the blasting times and blasting
frequencies known at this time?
Engineering 6 Environmental Servkes