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_~ M~~ 1 II I II II IIII IIII III I 3i.ar_ JF ..._~_ ....-,p _aa-. ~ _ ,. ,. ._ 999 DEP ART'dE~tT OF `: ATUR4L 0.ESOURCES O Monte Pascoe, Esecu;r.e O:r=c:or ~IL\ED L~\D RECL.~II~'TIU1 <23 Cantenniai 8ulioinq, t3t3 Sherman Street Denver. Coloraoo 80203 Tel. ;303)855-3567 David C. Shelton Director NOTICE OF INSPECTION ?ND INSPECTION REPORT ~,~ Dr. TidSPECTIQQ. April 8, 1982 ;~ No problems noted at ti.a of inspection. Mr. David Zeeb As a reminder, be sure to file your NAPE OF CPERATOR: CF&I Steel Corporation Annual Report or ;dotice of Intent co Continue on the Permit :~nniversar; Data 2.DDRESS: p. O. Box 3I6 ~ ^J Possible problem(s) - Note recotrWtenda- Pueblo, Colorado 81002 ~ tion(s) below to avoid further complica [ions cr possible violation(s) at the RE: 77-376 "Canon Dolomite FILE NO.: iIINE: Quarry" time of the next irsceccLon. (Please note the instructions indicated by an X to the right.) OBSERVATIO:]S OF Ti9PORL~'`]CE: Possible violation(s) - Noce recot~enda tion(s) below and reply to the Division by [o avcid enforcement action. Possible violation(s) pose(s) an immediata threat of harm co the environment, public orelfare, or continued operation. Enfarceaenc action forthcoming. This inspection was conducted for the special purpose of considering a proposal to amend the presently approved mining plan with regard to the waste rock disposal provisions. The durable rock fills in lower portions of Diablo Canyon were inspected and, while minor evidence of ponded water was observed, no significant impact was detected. Ponded water which results from large rain storms probably infiltrates the fill and passes on down the canyon in a matter of hours. The presently active waste rock disposed site (Area"SA") was inspected and no significant impacts were observed, even though the culvert underdrain described in the approved plan has not been installed. This fill is supposed to be placed such that the bottom layer consists of very large rock in an effort to provide adequate permeability for drainage under the rock fill. It should be pointed out that a "french drain" of this type-must be constructc~' with a great deal of care and deliberation to ensure its long term performance. It appeared that waste rock is being dumped into this section of Echo Canyon in a manner that does not adequately,separate the various rock fractions. This critical portion of the construction is nearly 50~ complete and it is unclear what measures CFS2 can take at this point to ensure that adequate permeability t/ill be maintained over the long term. The culvert underdrain concept probably isn't as good as the durable rock underdrain concept because the likelihood of culvert collapse due to corrosive weakening is greater than the likelihood of complete siltation impairment of the rock underdrain. The active mining operation was inspected and it would appear that an area approximately 200 feet wide, along the southern edge of the designated area has been recently added to the "major disturbance" category. CF&I t/ill incorporate these newly affected lands into the mining plan with the amendment proposal presently in preparation. No significant environmental problems would appear to have been created which cannot be rectified in the reclamation phase. The site which is the subject of the up-coming amendment to create additional waste rock disposal capacity was inspected and the various disposal alternatives and related environmental concerns were discussed. The basic concept is sound and the major concern (drainage/erosion control) shouldn't be too difficult to overcome. Since this entire site is visible from all igles wand for many miles, it would be very helpful if the outslopes of all the large rock ~Zs could be revegetated, at least in part, to minimize the esthetic impact. tation test plots were inspected and they appear to be doing fairly well. There ~O be quite a variety of species doing well establishing themselves in raw waste the most part, the plantings were unidentified (and unidentifiable without seed-heads=