2002-05-24_REVISION - M1995057

• Permit No: M1995057
• IBM Index Class Name: Revision
• Doc Date: 5/24/2002
• Doc Name: Review of Proposed Techinical Revision
• From: DMG
• To: Gunnison Gravel
• Type & Sequence: TR1
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
May 24, 2002
Warren Wilcox /
Gunnison Gravel `/
P.O. Box 42
R~ ~ F~eF~
C~i~ ,
Mqr ~~~;
~r~7siono~~ire~~8 ~O~
Gunnison, CO 81~ / e •-~°" /
/ rr /
Re: Rudibaugh Pit, Permit M-1995-057, Review of Proposed Technical Revision (TR-O1).
Dear Mr. Wilcox,
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING•SAFETY
Bill Owens
Governor
Greg E. Walther
Executive Director
Michael 8. Long
Division Director
I have reviewed the proposed changes to the above-named permit, as described in your April 16,
2002, letter. The addition of a wash plant is a simple change to Exhibit C (Mining Plan), but a bit
more information is necessary for us to fully assess the proposal. I have listed the items needing
to be addressed below.
1. Please provide better description of the locations of the equipment you listed, the pump sump
to be located on the irrigation ditch, and the settlement pond.
2. Please show these locations on a revised Exhibit E (Mining Plan Map). These items may be
sketched on a reduced-size permit map. Anew survey of the site is not needed, but changes
made to the site since the original maps were submitted in 1995 should be included on this
map. This should include general depiction of areas where mining is finished and the surface
shaped, where activities are still ongoing, etc.
3. Please verify that the irrigation ditch you mention is the "Huff and Dice Ditch" which is
described in the original application. That ditch crosses the eastern comer of the permit area,
and it is presumed that your proposed activity will affect the portion of the ditch lying within
the permit azea boundary. Please confirm this.
4. The original application states that the Rudibaughs are the last users of water from the Huff
and Dice Ditch, and there are no other downstream.users. Lf this is the ditch to be affected,
please confirm that there are still no other downstream users.
5. Please show that the use of water you propose is an allowed use of water from this ditch.
6. It is known that the material underlying the excavated material is porous. Please describe
how the settlement pond will retain its water long enough to clarify it and return it to the
imgation ditch. If sealing the pond is needed, please describe such activity.