Laserfiche WebLink
Q MWH <br />February 16, 2005 <br /> <br /> <br />FEB 1 1 2005 <br />Division of Minerals and Geology <br />F®1~ <br />114r. James R. Burnett <br />Colorado Division of Minerals & Geology Dialelon of Minerals and Geology <br />1313 Sherman Stteet-Room 215 <br />Denver, Colorado 80203 <br />(303) 866-3567 <br />Re: Oxbow Mining -Supplemental Information of Hubbard Creek Fansire <br />Dear Mr. Burnell: <br />Enclosed you will find changes made to Permit No. C-1980-022 TR-49 in response to your <br />Preliminary Adequacy Letter dated January 31, 2004. Changes included in this summary are: <br />• The Hubbard Creek fan facility has been added to Table 2.05.4-T1, Surface Disturbance <br />Summary, and text has been added to Section 2.05.4 describing the reclamation schedule <br />of the site. Text has also been added to Section 2.05.4 describing postmine land usage. <br />• Cross-sectieaal details of the Pond F emergency spillway and the plunge pool HCP-1 have <br />been added ro Map 2.05-M5J aad a Sedcad rnn of the emergency spilhvay has been added <br />to Exhibit 2.03-E3, Section 10. The Pond F Summary Table in Section 6 of Exhibit 2.03- <br />E.3 has been revised m include 10-year, 24-hour peak settleable solids eoe::entcation and <br />the 2S,-year, 24-hour peak discharge correspond to the Sedcad runs in S~cticn 10. <br />Additional Sedcad utility runs were performed on ditches HCD-1; HCD-2, 1ICD-3, and <br />HCD-4 at varying slopes and the results are summarized in the Channel and Riprap <br />Dimensions table on blap 2.05-MSJ, Sheet 2. These Sedcad runs are included in Exhibit <br />2.03-E3, Section 10 and replace the 25-year, 24-hour utility runs for these ditches. Figure <br />1, Channel Designs, has been added to Exhibit 2.03-E3, Section 7 also summarizing the <br />design of these ditches. <br />Table 1, Hubbard Creek Fasnim Culvert Summary, and Table 2, Hubbard Cteek Fansite <br />Plunge Pool Summuv, have been added to Exhibi[ 2.03-E3, Section 8 providing a culvert <br />schedule and details on the plunge pool. <br />Additionally, call outs have been added to Map 2.05-El-HFS, Facility Designs, referring to the <br />details 1, 2, and 3 on Map 2.05-bISJ. <br />If you have any questions please contact Jim Kiger ox myself. <br />Sincerel}' yours, <br />M~`~H <br />ohn V. Red~~ . <br />Engineering Manager <br />cc: JimKigex/Oxboww/enclosures <br />Y ~IrPi(LbullWl!¢LRFIT.nwrv.J <br />1/H/0) <br />P.G. Box 774018 Tel: 970 679 6260 Delivering Innovative Projects and Solutions Worldwide <br />1475 Pine Grove Road, Suite 109 Fax: 970 879 9048 <br />Steamboat Springs, Colorado <br />80477 <br />