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Colorado Division roject of Reclamation, <br /> Mining & Safety <br /> NATIONAL 410 PROJECT <br /> Gilpin County, Colorado <br /> Permit No. P-1981-014— PO/Contract# OE-PKA-09-080 <br /> Project Location and Background Shaft 1 <br /> The National 410 Project site is located 0.5 miles south of R <br /> the Town of Central City in Gilpin County, Colorado. The <br /> site lies at the end of a private road with a gated entrance <br /> on the north side of Virginia Canyon Road west of the <br /> Central City Parkway overpass. This project consisted of ,, 'N''• ....,.. . 4iii <br /> securing two (2) shafts using a polyurethane foam closure -' ``'.'' <br /> without access. . <br /> Shaft 2 1 <br /> The purpose of this project was to reclaim a hard rock <br /> mine located on private land in accordance with the 07' <br /> approved mining and reclamation plan. The National 410 <br /> Prospecting Notice of Intent (NOI) was terminated and <br /> the bond was forfeited on July 22, 2004. The Division of The National 410 shafts prior to reclamation. <br /> Reclamation, Mining and Safety reclaimed this site using _: . :,'' ;, , ; , ,,,').;4 ) <br /> the forfeited bond money, and severance tax money. ` 44* $ L <br /> F ' n' fr r <br /> The project consisted of safeguarding the two shafts using '` ;'- , -, f�tt <br /> polyurethane foam closure method — including a bottom :y4� pr$+ �.,g4,�„�°y.' ^ r(?VA <br /> form, PVC ventilation pipe, and backfillingthe top4. A - ; �' , Akt,t;`t r r <br /> A. eo Vele,/ <br /> several feet of the shafts. 4 " <br /> Construction Summary <br /> tipr <br /> The dimensions of the shafts were: l ' <br /> • Shaft One - Five (5) feet wide by nine (9) feet .. <br /> long and twenty-five (25) feet deep. <br /> • Shaft Two - Four (4) feet wide by seven (7) feet Shaft One-close-up-prior to reclamation. <br /> long and (durably plugged at) fifteen (15) feet Owner: <br /> deep Harold Caldwell—Private Landowner <br /> After clearing all loose timbers that enclosed the top of <br /> the shaft, a plywood bottom form was placed at General Contractors: <br /> approximately twenty-five (25) feet down inside the Berry Trucking&Excavating Inc. <br /> timbered lining of Shaft One. 8561 South Ammons, Littleton,CO 80128 <br /> DRMS Project Manager: Deb Zack <br /> For Shaft Two, the plug at the fifteen (15) feet deep base Colorado Division of Reclamation,Mining,&Safety <br /> of the shaft served as the bottom form. <br />