APPCOR12555

• Permit No: C1981047
• IBM Index Class Name: Application Correspondence
• Doc Date: 2/18/1982
• Doc Name: MEMORANDUM BLUE RIBBON PERMIT APPLICATION REVISED JANUARY 25 1982
• From: MLR
• To: RICH DOMINGUE
• Media Type: D
• Archive: No

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STATE OFCOLORADO RiCRAROD LAMfA Gov erno~
DEPARTMENT OF NATURAL RESOURCES
D. Monte Pascoe. Executive Director
MINED LAND RECLAMATION
423 Centennial Building, 1313 Sherman Street
Denver, Colorado 60203 Tel. [phone]
David C. Shelton
Director
MEMORANDUM
T0: Rich Dolllingue
FROM: Jerry Zimpfer
DATE: February 18, 1982
RE: Blue Ribbon Permit Application, revised January 25, 1982.
I have completed my review of the alluvial valley floor sections of the
Blue Ribbon permit application with revisions through January 25, 1982.
The applicant has identified 24 acres of unconsolidated streamlaid deposits
within the permit area. Blue Ribbon's size estimation is overly conservative.
Tom Gillis has planimetered the area based on information provided by U.S. Steel
and has found the same area to consist of two bodies of alluvium with a combined
area of 10 to 11 acres. Thus the area only marginally meets the OSM size
criteria for alluvial valley floors. Other information in the permit document
indicates that there is nDi~sufficient water to support agricultural activities.
(However, the information concerning the regional practices is extremely weak.)
On the basis of this information and a recent visit to the site, the Division
could determine that this area is not an alluvial valley floor.
Unfortunately the mapping of unconsolidated streamlaid deposits was limited to
the permit area itself in the vicinity of the surface facilities. In order
to complete the alluvial valley floor determination, the applicant should
submit a map of unconsolidated streamlaid deposits for the entire permit area
and adjacent areas, (I believe Roy has already requested this map.) The
adjacent area should begin 'z mile above the permit area and continue to the
North Fork of Gunnison. All deposits greater than 50 feet in width and
exceeding 10 acrLS in size should be identified. (A USGS 7.5 minute topographic
map is an acceptable base for this reconnaissance mapping.) If this mapping
identifies additional areas of unconsolidated streamlaid deposits, the applicant
should include additional discussion, on a case-by-case basis, existing or
historic flood irrigation the capability of flood irrigation, and the existence
of subirrigation.
Additional information on the North Fork of Gunnison would not be necessary.
This area has already been identified as an alluvial valley floor in the Mt.
Gunnison findings document. The permit application contains sufficient infor-
mation to show that mining would not car`~e material damage to the surface and
ground water that supply the alluvial valley floor.
Let me know if you or the applicant have any questions.
cc: Roy Cox
Ed Bischoff