2020-02-07_REVISION - M1977211 ‎(14)‎

• Permit No: M1977211
• IBM Index Class Name: Revision
• Doc Date: 2/7/2020
• Doc Name Note: Exponent Reort
• Doc Name: Adequacy Review Response
• From: Continental Materials Corp.
• To: DRMS
• Type & Sequence: AM4
• Email Name: TC1
• Media Type: D
• Archive: No

1100318 R0T0 0811 JRW1 5
Curriculum vitae of Jon Wren, Ph.D., P.E. and Philip J. Shaller, Ph.D are contained in
Appendix 1. A list of cases for which Drs. Wren and Shaller provided expert testimony at trial
or by deposition within the past four years is contained in Appendix 2. Dr. Wren’s hourly
billing rate is $295 per hour. Dr. Shaller’s hourly billing rate is $225 per hour. Photographs
taken by Exponent during its investigation are contained in Appendix 3.
2.2 Site Description and Background
Pikeview Quarry is an aggregate quarry that operates under Colorado Division of Reclamation,
Mining and Safety (DRMS) permit number M-1977-211 issued on May 27, 1980. The quarry
has a permitted area of 236 acres and has been in operation since approximately the early
1900’s. The quarry extracts Manitou Formation limestone by drilling and blasting on the lower
portion of an approximately 1,500 foot high ridge that forms a part of the eastern front of the
Rampart Range. Operations occur on the slope in an elevation range of approximately 7,000
feet to 7,900 feet. The top of the west wall of the quarry intersects three peaks that are
commonly referred to as the north peak, middle peak, and south peak.
Photograph 1 shows an aerial view of the Pikeview Quarry in 1998; Appendix 4 contains aerial
photography from 1998. Photograph 2 shows an aerial view of the Pikeview Quarry in 2001;
Appendix 5 contains aerial photography from 2001. Photograph 3 shows an aerial view of the
Pikeview Quarry in 2002; Appendix 6 contains aerial and ground photography taken in 2002.
Photograph 4 shows a panoramic view of the Pikeview Quarry in 2003; Appendix 7 contains
ground photography taken in 2003. Photograph 5 shows an aerial photograph of the Pikeview
Quarry taken in 2006. Photograph 6 shows a panoramic view of the Pikeview Quarry in 2007;
Appendix 8 contains ground photography of the Pikeview Quarry taken in 2007. Photograph 7
shows an aerial view of the Pikeview Quarry in April 2008. Photograph 8 shows an aerial view
of the Pikeview Quarry in August 2009.
2.3 Limitations
This investigation addressed specific conditions relevant to the Pikeview Landslide at the
Pikeview Quarry, and as such, its scope may not be adequate for other purposes. Use of this