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• Dirt road 3,000-square-foot roundabout was washed out <br /> • Steel safety rails embedded in the concrete along the top of the headgate were <br /> washed away or significantly bent <br /> • One gate mechanism was cracked from the force of the flood (Appendix C <br /> Photo 3) <br /> The headgate showed no major damage once the large debris pile was removed. The <br /> major washout directly below the headgate and the roundabout was backfilled with <br /> approximately 300 cubic yards (cy) of material from the flood outwash located in the <br /> general vicinity of the headgate. Large concrete blocks (2-ft by 2-ft by 6-ft)were placed <br /> as erosion control along the bank of the river just downstream of the diversion structure. <br /> Small boulders, cobble, and gravel from the general vicinity of the headgate was used to <br /> backfill behind the blocks. The sediment that was cleaned out of the Ditch was used for <br /> the remainder of the roundabout fill, creating an interlocking matrix capable of sustaining <br /> vegetation. Louden welded the cracked gate mechanism. <br /> Appendix C Photos 2 and 3 show the headgate after debris had been cleared. Appendix <br /> D Photo Sets 1 through 4 show the headgate, diversion structure and surrounding area <br /> before and after the completed repairs. Louden also cleared the debris piles from beneath <br /> the trailer park bridge west of the headgate(Appendix D Photo Set 5). <br /> 2.2 Diversion Structure <br /> The Ditch's concrete diversion structure is located approximately perpendicular to the <br /> headgate. This diversion structure spans the width of the Big Thompson River and is <br /> used to divert water to the headgate. Damage to the diversion structure included the <br /> following: <br /> • Pocketing in the concrete on the downstream face of the diversion structure <br /> (Appendix C Photo 1) <br /> • A large scour pocket along the bank on the south side of the diversion <br /> structure where the root balls of two trees had eroded out toppling the trees <br /> (Appendix C Photo 5) <br /> • Erosion and undercutting of the diversion toe(Appendix C Photo 4) <br /> Louden Irrigating Canal and Reservoir Company 3 Telesto Solutions,Inc. <br /> r:Vouden chichllouden_d7chlproducts12013_loadiengfneering rye letter111042013Jlnd_ktter120140110_kuden_as_consnucted_flood repave r ocd: January 2014 <br />