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PUBLIC WORKS DEPARTMENT
1111H STREET, P.O. BOX 758
GREELEY, COLORADO 80632
EBSITE: WWW.CO.WELD.CO.US
PHONE: (970)
356-4000, EXT. 3750
FAX: (970) 304-6497
COLORADO
May 21, 2010
Weld County Planning Department
Colorado Division of Reclamation, Mining, & Safety GREELEY OFFICE
Attention: Jared Ebert
1313 Sherman Street, Room 215 MAY 2 4 9n1(1
Denver, CO 80203
Re: Lafarge West, Nelson Pit, Permit No. M-1974-070 RECEIVED
Dear Mr. Ebert,
Weld County Public Works received your notice for the reclamation release of the Nelson Pit on May 18,
2010. As stated in our March 10, 2010 letter to DRMS, the mining activity has impacted the way in which
the FEMA mapped floodplain (Boulder Creek)functions. FEMA's floodplain regulations (44CFR 60 and
65) require that changes such as water surface elevations, floodplain boundaries, and floodway
boundaries be documented and accepted through the Letter of Map Revision process (LOMR). To date,
Weld County has not been informed of any pending LOMR for the Nelson Pit.
DRMS should be aware that FEMA, the State of Colorado Water Conservation Board, and Weld County
have floodplain regulations which potentially impact how the site can be used after reclamation. Pending
CWCB regulations will make it so that all state agencies will have to comply with the Federal, State, and
Local floodplain regulations. These agencies also have regulations in place regarding the erosional
stability of the fill that may be left in the Boulder Creek Floodplain at the completion of mining.
In order to ensure that citizens in unincorporated Weld County are not adversely impacted the changes
that have occurred in the floodplain due to the mining process, Weld County respectfully requests that
DRMS not to release any portion of the mine site until such time as FEMA has approved a LOMR which
documents the impacts that the mining activity has had on the floodplain and unincorporated Weld
County citizens.
Sincerely,
•
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M1i
Clay Kimmi, P.E., CFM c�
Drainage and Floodplain Engineer
Weld County Public Works
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M\PLANNING-DEVELOPMENT REVIEIMUSR-Use by Special Review\SUP-260 Nelson Pit\USR-1346 DRMS Letter 5-21-10.docx
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