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<br />. <br /> <br />. <br /> <br />location of irrigation head gates, individual attempts to protect streambanks, and overgrazing of <br />riparian vegetation. <br /> <br />Down cutting in the channel that followed straightening has resulted in a considerable reduction of <br />the height of the water table. This has caused reductions in the size and health of the riparian <br />corridor. In some areas, minimal vegetation cover has made forage scarce for both livestock and <br />wildlife. <br /> <br />Down cutting has also produced water quality problems. Some segments of the river, especially <br />those close to irrigation ditches, have higher velocities, which contribute to downstream increases <br />in sediment and bedload. Because of erosion and increased bedload, the general morphology of <br />stream has been altered to such a degree that it offers minimal habitat for fish and other aquatic life. <br /> <br />In the project area, twenty-seven ditch companies divert water from the Alamosa River to irrigate <br />approximately 50,000 acres of/and and to provide water for livestock. In summer, the river near <br />Capulin is dewatered due to agricultural withdrawals. Terrace Irrigation Company stores the water <br />of the Alamosa River watershed, depleting the water supply in winter months. <br /> <br />An Assessment of the Riparian Corridor of the Alamosa River, conducted in 1996 by the NRCS <br />Intermountain Riparian/Wetlands Resource Technician Team, determined that the riparian areas <br />have very good potential for recovery. "Cottonwoods, numerous willow species, and the herbaceous <br />components should respond favorably to proper management" says the report. Increasing the vigor <br />of plant cover in the riparian area is extremely important to the whole system. It will provide more <br />forage capability, canopy cover, pH buffering, sediment filtration, and bank stability. <br /> <br />The ARWRP, the A-LJWCD, and the landowners along the stream wish to design and construct <br />restoration features which will allow the Alamosa River to function once again as a natural stream. <br /> <br />MAPS( attached) <br />Descriptions of map and project area: <br /> <br />The ARWRP has developed its' own map which separates the stream into segments I through 4. <br />Segment I begins at the Terrace Reservoir and number 4 ends downstream at Hwy.285. Scale <br />I n= 50,000. <br /> <br />All these segments are in segment 9-10 as identified by the Colorado Department of Public <br />Health and Environment, Water Quality Control Commission's Classifications and Numeric <br />Standards. However, the characterization used in this map has no relation with the report and is <br />used for convenience to describe the project. <br /> <br />Segment 1. Terrace Reservoir to one mile above the Gunbarrel Road (approximately 8 <br />miles). There has been little alteration in this reach. Channel instability is due to <br /> <br />Page -2- <br />