Laserfiche WebLink
1 <br />1 • <br />1 <br />1 <br />1 <br />STATE OF COLORADO <br />Hloherd D. Lamm, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WILDLIFE <br />Jeck R. Grleb, Director <br />6060 Broatlway <br />Denver, Coloratlo 80216 825-1192 <br />June 6, 1983 <br />Mr. Scott Jones <br />Environmental Coordinator <br />Snowmass Coal Company <br />PO Box 980 <br />Carbondale Colorado 81623 <br />RE~EI~~"D <br />JUN ~ <br />~w~~ ~µym. <br />Dear Scott, <br />' Thank you for the opportunity to review the data for Snowmass Coal Company's <br />proposed fish ladder/weir design for North Thompson and Middle. Thompson Creeks. <br />The basic design concepti.s acceptable and adequate except that the actual ladders <br />need to be extended either in width or length or both as the di.-nensions during high <br />' water flows appear to be minimal. <br />I recommend either extending the fish ladder downstream (require extended splash <br />' • plate under ladder) or extend the length of the fish ladder from seven feet to a minimum <br />of twelve feet or to the edge of the side~vall of the weir. The notches in the Ladder <br />should be off set to correspond with the center of the seven foot wide upper notch. <br />' This would allow a more adequate resting area out of the main flow of the creeks. <br />No removal of the overstory should occur and any riparian vegetation removed <br />' during construction should be anchored in khe pool created and below the mid water <br />line to provide habitat for aquatic insect forms. <br />' The bottom of the upstream pool which is created by the weir should have natural <br />rock configurations with large boulders for resting/escape cover (bottom should not <br />be graded, leveled, smoothed etc. ). <br />If the Colorado Division of Wildlife can be of further assistance or if more information <br />' is needed please feel free to call on us. <br />' Sincerely, , C~ed <br />l<~YV1~~ O ~'~~J <br />' ames O. Goodyear John Seidel <br />District Wildlife Manager Area Wildlife Manager <br />• 0323 Elk Range Drive <br />' Carbondale Colorado 81623 <br />' DEPARTMENT OF NATURAL RESOURCES, Monte Poscoe, Executive Director • WILDLIFE COMMISSION Wilbur Redden, Chairman <br />Donald Fernandez, Vice Chairman • James Smith, Secretary • Jean K. Tool, Member • Vernon C. Williams, Member <br />Michael Higbee, Member • Sam Caudill, Member • Richard Divelbi;s, Member <br />~.4 <br />