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May 15, 2001 <br />Mr. Bruce Humphries <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />1 <br />999 <br />CLIMAX MOL BDENUM COMPANY <br />o Subsidiary of Pnelpe Oodge Carpor+mron <br />• <br />HENDEp90N C <br />RECEIVED gunty Road 3 <br />n `I` ( 0(, y 9302 Cuunl y Road 3 <br />Parshau, Co+o•ad.• 80468 <br />(3031 559-3221 <br />Fax (970) 7 ?5.0038 <br />MAY 18 2001 <br />Division of Minerals and Geology <br />RE: 1 -Dam Wellfield Project - Technical Revision TR -10 Submittal, Henderson Mill, Permi <br />No. M -77 -342 <br />Dear Mr. Humphries: <br />The Henderson Mill is planning to install a groundwater interception wellfield below our tailing:. <br />impoundment. Per our earlier conversations regarding this project with Mr. Allen Sorenson, this, <br />type of facility is considered a "permit condition protective of groundwater" under Rule 3.1.7. <br />Currently, seepage from Dam No. 1 is collected in a surface collection canal and is pumped bacl <br />into the main tailings water pool. This wellfield will expand our ability to capture tailing:. <br />seepage to the subsurface or groundwater zone. <br />The following document, "Scope of work: 1 -Dam wellfield for groundwater capture project," <br />presents the scope of work (design and construction management) to be cotpleted for a <br />groundwater extraction well system to be installed within the alluvial channel downgradient from <br />Dam No. I. It should be noted that drilling for the project to install piezometers and to site tilt- <br />extraction wells must begin prior to completion of the final design report. Henderson will submi <br />the final design report to the Division of Minerals and Geology once is has been completed. <br />Please call if you have any questions or are in need of any further information. 1 can be reached <br />at (303) 569 -3221 ext. 2214. <br />Very truly yours, <br />r/-12 <br />Erich Bower <br />Environmental Engineer <br />Climax Molybdenum Company <br />Enclosure <br />Cc: Allen Sorenson - DMG <br />Anne Beierle - Climax <br />Rich Wagner - Climax <br />Dan Stewart - Climax <br />Mike McDonald - Climax <br />