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P~4 • <br />PFABODY COAL COMPANY <br />Wsstsm Division <br />_l,-_~ <br />,~,~ , .~ <br />._ , -~ __ <br />~'=l~ j ~ICj J~ <br />September 12, 1991 <br />Mr. Dan Mathews <br />Colorado Mined Land Reclamation Div. <br />1313 Sherman Street Room 215 <br />Denver, Colorado 80203 <br />RE: Quarterly Sedimentation Pond Inspections -Seneca II Mine <br />Dear Mr. Mathews: <br />1300 Sout11 Yaffe <br />Flagstaff, Arizona 86001 <br />(602) 774-5253 <br />Enclosed is the 3rd quarter inspection for Pond 006 at the Seneca II-W <br />Mine. T'he emergency spillway elevation has been lowered and riprap <br />is being placed in the outfall channel. Also, according to TR-10, the <br />drop inlet riser pipe has been installed on the existing 24" cmp. <br />Conditions appeared stable and acceptable. <br />If you have any questions, please call me. <br />Respectfully, / pp <br />~~~ /~l~~rG~ <br />Ronald J. Gehrke P.E. <br />Senior Engineer <br />swl <br />Enclosures <br />iiir~rriii«rriir~i <br />c: Fred Fest <br />Dennis Jones <br />