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999 <br /> January 5, 2000 Tutuepo' "ate'1nr, <br /> Consultants for t_and, Mineral and water BAN 0 <br /> Ms. Erica Crosby 11forr <br /> Division of Minerals and Geology o1 Morals <br /> 1313 Sherman St., Room 215 <br /> Denver, Colorado 80203 <br /> RE: Adequacy letter dated December 16, 1999 regarding Technical Revision 002 to Hall <br /> Irwin Construction Company Permit No. M-83-090 <br /> Dear Ms. Crosby: <br /> Following a discussion with Jeff Gregg of Hall Irwin, here are responses to your individual <br /> comments from December 16. <br /> 1. The'reclaimed ponds should be labeled from west to east on the north side of the river, 1, 5, <br /> and 4,and on the south side of the riven from west to east,2 and 3. It is my understanding <br /> that,there was a Technical Revision some years back to change the numbering on the original <br /> 1983 Reclamation Plan. <br /> 2. Hall Irwin commits to having a representative from Sinclair Pipeline Company present on <br /> site during the spillway construction. <br /> 3. The 1998 flood inundated most of the three ponds on the north side of the river, however the <br /> only evidence of significant damage occurred where flow was concentrated between ponds 5 <br /> and 4. This damage will be,mitigated and controlled in the future by the construction of a <br /> spillway. All other locations where water enters and exits the ponds seem to be able to <br /> withstand the erosional forces of the river and it is not thought that additional spillways are <br /> necessary. <br /> Please feel free to call if you have any questions or additional comments. Thanks. <br /> Sincerely, <br /> TUTTLE APPLEGATE, INC. <br /> Dana Moore, EIT <br /> CC, Jeff Gregg, Hall Irwin Construction Company <br /> TA File#99-203 <br /> 11990 Grant St. Suite 304 • Denver, CO 80233 5441 Boeing Drive. •Suite 200 • Loveland,CO 80536-8855 <br /> (303)452-6611 • Fax(3031 4;;9-27.r4 147fn dui-QAAA-a F,,;tarn%A11-,177 <br />