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Stipulation No. ?: The permittee will accomplish inspections of the Streeter Canyon ?ill and submit certified inspection reports to the regulatory authority in accordance with the requirements of the plan 3esigned in accordance with Rule 2.05. These inspections and certified inspection reports will include specific examination and discussion of the facial conditions of the fill, in order to determine whether the development of perched water tabl=s within the fill is affecting its surficial slope stability. Further, if the required engineering inspections determine that surficial slope failure conditions are imminent, or if surficial slope failure manifests itself within Streeter Canyon Fi11, the permittee will prepare and submit to tae regulatory authority detailed engineering plans to abate any imminent or manifested slope stability problem. Any appropriate remedial activity shall commence immediately following the approval of the detailed engineering plane by the regulatory authority. Status: Resolved in the State Decision Document dated July 10, 1987, for the permit renewal application approval. Special Federal Condition: Three sites (5MF401, 404, and 405) recorded and recommended for further testing is 1975, require further investigation before Final eligibility e determination can be made. OSMRE xi 11 field check these sites, update the site(s) status, and make final eligibility recommendations. Until this time, these site shall be protected from impacts by avoidance. Should one or more of these sites be determined eligible for listing to the NRHP, the operator shall confer with and obtain the approval of OSMRE and the Colorado SHPO, concerning the development and implementation of mitigation measures as appropriate. Status: Resolved in the OSMRE letter to Colowyo Coal Company dated November 19, 1985• All of the special conditions attached to the Federal permit-mining plan approval have been resolved. Therefore, the mining plan approval has no special conditions. The standard conditions of the existing mining plan approval are attached to this memorandum (Attachment A). An "Experimental Practice" for the Stye=_ter Fi11 on the Colowyo mine was approved by Colorado MLRD on August 26, 1982 and approved by OSMRE on September 10, 1982 pursuant to 30 CFR 785.13. Subsequently, OSMRE approved an amendment to the Colorado State regulatory program that allowed alternative design standards for excess spoil fill. On August 28, 1986, Colorado MLRD terminated ~he Streeter Fill "Experimental Practice" and redesignated it as en excess spoil fill, designed and constructed using "alternative design standards" pursuant to Rule 4.09.1(3)• All monitoring requirements for the fill remained as originally approved to insure the stability requirements of, Co lorado Rule 4.09 were met. The Federal approval of the Experimental Practice was terminated when OSMRE approved the Colorado State program amendment which allowed the spoil handling practice.