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rear-cu-ul uo:-~7 u~rJ~ rwuua nu y/V+SL/t4Lbl P.04 <br />• <br />and intersected the bench located another 50 feet up slope. Placing rip rap at the toe of the scarp <br />will aot alter the continuation of this process, as it is no longer fluvial but rather colluvial. <br />Therefore, we will not be doing any work at this specific site. <br />We aze requesting the CORPS provide us written documentation that the work completed to date <br />is consistent with the permit and that it is acceptable to the CORPS. It is recognized that the <br />project has been reduced significantly from that originally proposed and permitted. The CORPS <br />indicated that before they could provide comment back on the adequacy of the work they would <br />like a summarization of those changes and why they were necessary. Our rationale is provided <br />in this memo. In addition we are providing a marked up copy of the original drawings showing <br />how the completed work differs from the original proposal. The changes that were made were <br />documented in two memos to the Corps, the first dated November 14, 1997 and the second <br />December 4, 1998. <br />Tn our Environmental Analysis titled, "San Miguel River Restoration (Stabilization) Projecr, <br />Apri, 19iv, fivz envirvn:«ental isst:es were idzntifiec' that, at t.':e time, i^itia~~d the reed fer <br />action. <br />1. Accelerated streambank erosion and lowering of the water table have resulted in a loss <br />of, or impacts to, aquatic and riparian habitat. <br />2. Affects on the aesthetic values of the azea. <br />Increased sediment delivery downstream is currently impacting habitat and water <br />quality in the lower reaches. <br />4. The recreational fishery is being impacted due to a loss of habitat, sedimentation and <br />erosion. <br />5. The stream has lost its "sediment transport capabilities" through the braided portions of <br />the channel. <br />Our decision was to implement an altcmative that would: <br />Rehabilitate and stabilize the South Furk San Miguel River and the muinstem San Miguel <br />River above its cont7uencc with the South Fork; <br />Halt further headcutting of the channel by installation of grade control swctures; <br />Reduce accelerated bank erosions; <br />Create a single channel and eliminate the braided pattern which now exists; <br />Enhance aquatic and riparian habitat quality; <br />Reduce the potential impact of future flood damage; <br />Improve the visual, aesthetic ,biological and physical qualifies of the riverine <br />environment. <br />