PERMFILE72271

• Permit No: M2003091
• IBM Index Class Name: Permit File
• Doc Date: 9/1/2004
• Doc Name: Adequacy Response #2
• From: Lafarge West Inc
• To: DMG
• Media Type: D
• Archive: No

LAFARGE
NORTH AMERICA
Construction Materials
August 30, 2004
SEP 9 1 ~~~4 /
Erica Crosby
Division of Minerals and Geology
1313 Sherman St., Room 215
Denver, CO 80203
Division o/Minerals and Geology
RE: Lafarge West, Inc., Application No. M-2003-091
Duckworth Pit, Adequacy Response #2 /
Dear Erica,
Lafarge received the adequacy review from Division of Minerals and Geology (Division) for the
Duckworth Pit New 112 Application, File Number M-2003-091. The following responses have
been prepared to address the Division's concerns.
1. The Division previously questioned storm water runoff drainage that will be detained in
the adjacent Cottonwood Pit.
The original permit application stated, "...runoff...wil] be detained in the ponds already
existing at the previously permitted Cottonwood Pit...." in error. Stormwater at the
Duckworth site will flow into the property's dewatering trenches, allowed to settle in the
collection areas, and monitored as required by the NPDES permit and Stormwater
Management Plan prior to dischazging. The Revised 112 Reclamation Permit Application
submitted for the last adequacy review had the erroneous text removed.
As previously stated, Lafarge proposes to mine through and relocate the Smith &
Emmons Ditch. Lafarge has not yet submitted a notarized agreement between Lafarge
and the owner of the Smith & Emmons Ditch to mine through and relocate the structure.
Until such agreement is submitted and approved by the Division, Lafarge will need to
revise all maps to reflect the approved mining off-set distance from the Smith and
Emmons Ditch. If such notarized agreements cannot be achieved during this review
period, then a revision to the permit will need to be filed in the future prior to mining
closer than the approved mining off-set distance.
The Ditch Relocation agreement between Lafarge and the Smith & Emmons Ditch
Company has been executed and is attached.
3. Exhibit C depicts the location of the topsoil piles along the top of the mining limits on the
south side of Phase I and the north, south, and east sides of Phase IL Please inform the
LAFARGE NORTH AMERICA INC. -Lafarge Construction Materials
1400 West 64~ Avenue, Denver, Colorado 80221
Telephone: [phone] Facsimile: [phone]