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Mr. Thomas A. Schreiner Page 2 <br />March 9, 2005 <br />cross section of the spillway is shown in Attachment B. Varra Companies will adjust: a) grading, b) stockpile <br />locations, and c) equipment placement such that floodwaters conveyed through the temporary spillway will be <br />unimpeded as they flow from west to east through the pit. The results of a hydraulic analysis associated with <br />this Interim Measure (See Attachment C) indicate that 100-year water surface elevations along the Objector's <br />property will be lower lien the Objector's buildings floor elevations. <br />Any areas disturbed during construction of the Interim Measure will be renegotiated with an appropriate seed <br />mixture. Long-term stability components (such as riprap and a control sill) will be added to the ultimate <br />spillway configuration during construction of the long-term Flood Control Mitigation Plan. Due to tailwater <br />constraints from each of the existing ponds on the site and the Cache la Poudre River backing up into the pits <br />from downstream, erosion of the interim measure will be minimized. The Varra Companies will repair and <br />maintain the interim spillway. <br />This plan was delivered to Weld County, the local floodplain agency, for revieev. We received approval from <br />Weld County as shown in Attachment D. We are anticipating starting construction of the Interim Measure <br />Thursday March 10°i. We anticipate completion of the Interim Measure on or about March 12ih. Varra <br />Companies will be available for a site visit by DMG staff on March 14th or 15'h to inspect the Interim Measure <br />prior to the board meeting on March 16'". <br />We would greatly appreciate your timely review of this submittal. If you have any questions or comments <br />concerning any ofthe enclosed information, please do not hesitate to call Chris Varra at (303) 666-6743 orme <br />at (970) 226-0120. <br />Sincerely, <br />ANDERSON C/O~NSULTING ENGINEERS, INC. <br />~.~~~" ~/ <br />Chris J. Pauley, P.E., C.F.M. <br />Project Manager <br />CJP/vla <br />Attachments: A. Interim Measure Spillway -Plan and Profile <br />B, Interim Measure Spillway -Cross Section <br />C. Interim Measure Spillway-HEC-RAS Output <br />D. Weld County Approval Letter <br />Cc: Chris Varra, Varra Companies, Inc., w/ attachments <br />Kim Ogle, Weld County Planning Department, w/ attachments <br />Michael Bliss, Bliss Produce, Inc., w/ attachments <br />Forrest Leaf, Leaf Engineering, Inc., w/ attachments <br />l:\OI'I:N`Corc03-01\Cq\'COa-01 TSchreiner Interim Mews I I 1-RNi\I_Juc <br />