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ACZ ACZ Inc. <br />Engineering and Environmental Services <br />1475 Pine Grove Road, Suite 109 <br />P.O. Box 774078 <br />Steamboat Springs, Colorado 80477 <br />303-879-6260 <br />March 18, 1992 <br />iii iiiiiiiiiiiiiiu <br />999 <br /> <br />Ms. Catherine W. Begej NQR 1 9 X99! <br />Colorado Mined Land Reclamation Division Maned Land <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 co^la~'O+i^^ ~~~ <br />Re: EFCI Southfield Mine (Permit No. C-81-014) <br />TR-13 Modifications to Drainage and Sediment Control Plan/Abatement of NOV C-91-29 <br />Dear Ms. Begej: <br />Accompanying this transmittal is a technical revision request For modrfications to the drainage and sediment <br />control plan for the Southfield Mine. The proposed modifications respond to Condition 2 of Nov C-91-29 <br />and include design Information for a number of ditches and culverts not previously identified or addressed <br />in the existing approved EFCI Permit Application document. EFCI has also included in this response <br />submittal design information on several drainage structures which have been discussed with CMLRD Staff <br />but were not specifically addressed by the NOV. <br />It should be noted that Condition 1 of the referenced NOV related to field maintenance concerns which <br />were addressed by appropriate remedial action prior to the corresponding January 16, 1992 abatement <br />date. <br />The accompanying response submittal is formatted in a comment/response format to facilitate CMLRD <br />review. Supporting materials, including revised text, tables and maps, are identified and placement <br />instructions provided by the attached Summary of Revisions/Additions. Please review the accompanying <br />information and feel free to contact me with any questions or concerns. <br />Sincerely, <br />ACZ Inc. <br />Jerry ettleto~i~/~ <br />JMN:cmc <br />attachments <br />cc: R. Acre/Southfield (w/o attach) <br />A. Weaver/Southfield (w/attach) <br />C. Carey/Southfield (w/o attach) <br />P. Goldsmith/EFC Denver (w/attach) <br />c' \,wngo'I\~\ permmm\begel.llr <br />OJ/19/99 Bam <br />