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<br />peregrine falcon, and Mexican wolf. <br />listed as: ~he Mexican stoneroller, <br />Shiner, Blunthose Shiner, and Concho <br /> <br />Threatened species are <br />Big Bend turtle, Chihuahua <br />River pupfish. <br /> <br />Without protection and management of lands adjacent to the <br />river, over-grazing, proliferation of private camps, and possible <br />development of vacation home subdivisions will intensify. These <br />factors will adversely affect rare plants and wildlife habitat, <br />resulting 'in loss of vegetation, increased siltation, woil loss <br />and soil compaction in high use areas. <br /> <br />The canyons of the ,Rio Grande contain numerous historical <br />and archeological sites which constitute a non-renewable source <br />of data concerning man's presence in the region over the last <br />10,000 years. Archeological sites range from Paleo-American hu~ters <br />and Neo-American hunters and gatherers, to Coahuiltecan Indians <br />and Apaches. Typical historical sites include evidence of presidios, <br />trails, candelilla wax plants, villages, railroad construction camps, <br />mines, and ranching~ Lack of adequate protection for these archeo- <br />logic and historic sites will result in increased disturbance and/or <br />destruction of an irreplaceable resource. <br /> <br />Overall, without adoption of the proposal, .many of the natural <br />scenic and recreational attributes of the Rio Grande Wild and Scenic <br />River would be lost. <br /> <br />Problem Area 3, ABA 1305. Water Supply and Related Problems in <br />the Lower Rio Grande Valley. <br /> <br />The Lower Rio Grande Valley of Texas includes Starr, Wil1acy, <br />Hidalgo and Cameron Counties, encompassing 4,241 square miles. -This <br />area, due to its favorable climate, unique recreational and retirement <br />potential and port facilities, has the capacity for significant <br />economic growth and improvement in the quality of life of its resi- <br />dents. Although the economy is heavily agriculturally oriented, <br />other economic sectors have gained significantly in recent years _ <br />most notable textiles, food processing and packaging, and petrole~~ <br />refining and petro-chemical production. The port of Brownsville <br />consistantly ranks near the top among the Nation's ports in value of <br />fishe~products landed, princ~pai1y shrimp. The most important in- <br />dustries in the Valley are irrigated agriculture, petroleum refining <br />and petrochemical production, synthetic textile production and food <br />processing, all of which are intensive water using sectors of the <br />economy. <br /> <br />003107 <br /> <br />59 <br />