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r PUBLIC WORKS DEPARTMENT
1111H STREET, P.O. BOX 758
I Planning Department GREELEY, COLORADO 80632
Weld County WEBSITE: WWW.CO.WELD.CO.US
W�`P�. GREELEY OFFICE
PHONE: (970) 356-4000, EXT. 3750
HAR 1 107010 FAX: (970) 304-6497
COLORADO DECEIVE[?
March 9, 2010
Colorado Division of Reclamation, Mining, & Safety
Attention: Jared L. Ebert
1313 Sherman Street, Room 215
Denver, CO 80203
Re: Platte Sand & Gravel, LLC, S&H Mine, Permit No. M-2000-158
Dear Mr. Ebert,
Weld County Public Works is familiar with this permit as it is currently being reviewed by FEMA under a
Letter of Map Revision (LOMR). The LOMR was submitted to FEMA to gain their acceptance of the
existing floodplain and floodway conditions. Weld County has had discussions with the applicant's
engineer regarding the water storage component of the reclamation plan. Weld County understands that
fill will be placed in the floodplain to provide embankments around the reclaimed gravel pits to maximize
the amount of water storage available.
DRMS should be aware that FEMA, the State of Colorado Water Conservation Board, Weld County, and
the Town of Milliken have floodplain regulations that potentially impact how the site can be used after
reclamation. The agencies have regulations regarding the erosional stability of the fill to be placed in the
South Platte River Floodplain. FEMA also has regulations that require a conditional letter of map revision
(CLOMR) be approved prior to the placement of any fill in the floodplain. The CLOMR has to show what
kind of impacts the proposed project will have on the 100-year flood water surface elevations on
properties upstream, downstream, and adjacent to the pit. The CLOMR must be submitted per FEMA
requirements and must show that the 100-year flood water surface elevations are not increased on
adjacent properties without the property owner's written consent. Once the CLOMR is accepted by
FEMA, the applicant can begin placing fill in the floodplain and create the embankments for the water
storage reservoirs. Once the project is completed, FEMA requires that another LOMR be completed
showing the as-built condition and the affects of the embankments on the water surface elevations on
adjacent properties.
In order to ensure that Weld County citizens are not adversely impacted by the change in the reclamation
plan, Weld County respectfully requests that a condition requiring the applicant to obtain a CLOMR for
water storage from FEMA be added to DRMS conditions of approval. Weld County also requests that a
condition be added to the DRMS conditions of approval requiring the CLOMR to be converted to a LOMR
prior to final reclamation release.
Sincerely,
ir[`lJ r
;/Clay Kimmi, P.E., CFM
Drainage and Floodplain Engineer
Weld County Public Works
Original: .fared Ebe19, DRI1S
PC: USR-1306
CC: Platte Sand & Gra,el, I I.C. 1'_U. bus /80, Littleton, CO 80160
Kim Ogle, Planning Servicrtc 2010-0546
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M9PLANNING-DEVELOPMENT REVIENAUSR-Use by Special Review\USR-1306\DRMS Letter&&10.docx
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