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SUMMARY AND CONCLUSIONS The blasting at the proposed MMRR Quarry is likely to cause some damage to the wastewater treatment facility and is likely to cause damage and disruption of the instrumentation. 2. The blasting at the proposed MMRR Quarry is likely to cause damage to the lighting facilities including damage to the foundation and the lights. 3. Further vibration studies should be conducted once site specific data is available. The results of these studies should be provided to the structural engineer as well as the instrumentation vendors to deternine the affects. PURPOSE AND SCOPE OF WORK This report presents the results of a vibration study of the Black Hawk/Central City Sanitation District Wastewater Treatment Plant and Silver Dollar Metropolitan District Lighting Facilities, Black Hawk, Colorado. The study was conducted for the purposes of estimating the velocities to be expected at the wastewater treatment facility and the lighting facilities caused by the blasting at the proposed MMRR Quarry to be located immediately to the north of the wastewater treatment facility across state highway 119. The study was conducted in accordance with our proposal number POS-58 to Mr. Joe Bernosky, Leonard Rice Engineers, Inc. dated October 28, 2005. The work consisted of a site visit to the wastewater treatment facility to inventory the structures and to determine the locations of the various structures in relation to the proposed MMRR Quarry. The available information was reviewed and estimations of the expected velocities were calculated. This report has been prepared to summarize the data obtained during this study and to 1 present our conclusions and recommendations based on the proposed quarry operations, the subsurface conditions and the nature of the facilities. PROPOSED CONSTRUCTION It is proposed to construct and operate a quarry operation to the north of the Black Hawk/Central City Wastewater Treatment Facility across state highway 119. The operation