2003-03-24_REPORT - M1977493 - Laserfiche WebLink

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Engineering Construction Report for No. 7 Shaft Cap at Climax Mine by Ellis Environmental Engineering, Inc., February 2003 4.0 Approach Several individuals involved with the project were contacted to gain relevant facts concerning the capping effort. The following people were interviewed by the author: • Mr. Richard Gresham, P.E. - Former Owner and Chief Engineer with Ram Engineering during the design and construction of the cap. • Mr. Matt Kannegaard - Owner of Ram Specialists; worked on the shaft capping job and provided the rough -draft of the As -Built drawing for the shaft. • Mr. Stewart Teuscher - Engineer with Climax Molybdenum Company; original engineering contact for contractors during the design phase of the project. • Mr. Bryce Romig - Environmental Manager at Climax Mine during construction of the No. 7 Shaft cap. Climax Mine's file on No. 7 Shaft was also reviewed for pertinent details pertaining to closure. The following documents were determined to be significant during my review: • Four 8.5 x 14 drawings of various plan and section views of No. 7 Shaft prior to capping. • Ram Engineering letter to Stewart Teushcer, dated May 23, 1996 with two alternatives for shaft plugging (includes sketches of two alternative designs). • Ram Engineering Drawing 181 -A, dated June 30, 1996 with hand - written note "As- Builts". • Ram Engineering Quote for No. 7 Shaft Plug dated June 27, 1996 that lists specifications for beams, re -bar, decking, and concrete. • Several photographs taken by Mr. Bryce Romig during construction. • Test results on three concrete cylinders obtained from the concrete slab dated November 17, 2000 with an attached cover letter from Mr. Richard D. Reiter of Earth Engineering Consultants, Inc. The following additional information was obtained to assist in the engineering review: • Test results from a composite sample of the fill around the shaft cap. Samples were collected by the author on August 20, 2002 and tests were performed by ACZ Laboratories in late August 2002. • Photographs by the author taken during construction in August 1996. • Another copy of Ram Engineering Drawing 181 -A with Mr. Matt Kannegaard's hand- written notation about the steel I -beams used in construction. A site visit to verify dimensions of the final cap was made by the author on August 20, 2002. Direct measurements of the length, width, and thickness were made. The locations for the concrete test cylinders were verified, and soil samples from surrounding fill were collected. 2