2014-04-04_REVISION - M1978056

• Permit No: M1978056
• IBM Index Class Name: REVISION
• Doc Date: 4/4/2014
• Doc Name: Reply to OMLR inspection of December 12, 2013 TR03
• From: Varra Companies, Inc.
• To: DRMS
• Type & Sequence: TR3
• Email Name: PSH
• Media Type: D
• Archive: No

Varra Companies, Inc.
OFFICE OF SPECIAL PROJECTS
8120 Gage Street Frederick, CO 80516 Telephone [phone] Fax [phone]
Friday 4 April 2014
Colorado Office of Mined Land Reclamation (OMLR)
Division of Reclamation Mining and Safety
ATTN: Peter Hays, E.P.S.
1313 Sherman Street, Room 215 APR 0 4 2014
Denver, Colorado 80203
Divi�ion of reclamation,
M
Subject: Technical Revision — Varra Companies, Inc. ining &Safety
Durham Sand & Gravel Pit — M1978 -056
Reply to OMLR inspection of 12 December 2013.
ATTACHEMENTS:
• Technical Revision Submittal Fee — Check #: 36251 in the Amount of $216.00.
• Proof of Placement — Weld County Clerk to the Board.
• Army Corps of Engineers (A.C.E.) submittal of 14 November 2013.
• Army Corps of Engineers (A.C.E.) letter of Approval dated 21 November 2013.
This Technical Revision JR) is intended to satisfy the concerns expressed in the 12
December 2013 OMLR inspection Report inspection report. Two copies of the TR are
included along with the required fee and proof of placement with the Weld County Clerk
to the Board, and related attachments (see above). We are attempting to obtain a
letter of concurrence from Weld County respective of the A.C.E. approved work, and
will forward as part of this Technical Revision upon receipt.
As part of this submittal, some clarification of the observations and conditions of the
OMLR inspection report of 12 December may prove helpful. In prior discussions with
FEMA, it was conveyed to us that the flow of authority for floodplain management is as
follows: The A.C.E. creates a map, which it gives to FEMA, which it gives to Weld
County to enforce, and accordingly, from that FEMA provides insurance available to the
flood area. It is therefore Weld County that oversees the enforcement of the map.
No change to elevations or the map are proposes in the repair of the designed berm.
This berm is a reduction of a natural berm to an elevation established through and
approved CLOMAR. Nothing in the CLOMAR is changed by the proposed use of earth fill
to meet the established elevation. The only difference is it will not include a defective
design in the form of a concrete sill, the reconstruction of which would create needless
expense and no benefit to the floodplain.
The concrete sill was put in place to protect the basin from lower flood flows. During
the September 2013 high waters that approximated a 100 year event, waters eventually