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<br /> <br />O~1555 <br /> <br />From the Determined Eligible Properties List for <br />the National and Colorado Register of Historic <br />Places: <br /> <br />1. Cokedale No. 1jChinese Tunnel <br />2. Bear CanyonjVallaroso <br /> <br />Problem Identification: <br /> <br />Three major problems identified in the watershed are: active <br />storage loss due to sedimentation of Trinidad Lake; water quality <br />impairment from sediment loading; and degradation of the resource <br />base from water erosion. <br /> <br />Candidate plans Considered: <br /> <br />One of the candidate plans considered was the "Land <br />Treatment to Control Erosion" plan. It treats gully, sheet, and <br />rill erosion throughout the watershed and reduces sedimentation <br />of Trinidad Lake. A second plan considered was the "No Action" <br />plan which was used to derive potential benefits for the <br />recommended plan. <br /> <br />Alternatives Considered: <br /> <br />The following alternatives were considered and evaluated as <br />possible solutions to the Trinidad Lake sedimentation problem: <br /> <br />1. construct concrete sills in the canyons. <br /> <br />2. Construct large sediment control structures on the <br />major tributaries to Trinidad Lake. <br /> <br />3. Land treatment to control erosion (includes enduring <br />and management practices). <br /> <br />4. Watershed treatment using management only. <br /> <br />5. NO action alternative is presented for the <br />purpose of comparing the future without project <br />conditions with the treatment alternatives. <br /> <br />project purpose(s): <br /> <br />The primary goals of the project are: to achieve a reduction <br />in sediment loading to Trinidad Lake, thereby prolonging its <br />life; and improving the water quality delivered to the lake. <br />These goals will be attained through increased resource base <br />protection. <br /> <br />3 <br /> <br />