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Blast Vibration Analysis: Proposed MMRR Quarry Page 1 BLAST VIBRATION ANALYSIS OF PROPOSED MMRR QUARRY ON THE BLACK HAWK/CENTRAL CITY WASTEWATER TREATMENT PLANT AND SILVER DOLLAR METROPOLITAN DISTRICT FACILITIES INTRODUCTION At the request of the Black Hawk/Central City Sanitation District (BHCCSD) and the Silver Dollar Metropolitan District (SDMD), Leonazd Rice Engineers, Ina (LRE), assisted by Hollingsworth Associates, Inc., undertook a blast vibration analysis of the proposed MMRR Quarry as described below. ` ' Clear Creek District Water Providers, LLC filed Application Number M-2004-067 (amended) with r ~ the Colorado Division of Minerals and Geology (DMG) to permit and construct an aggregate rock quarry on State Highway 119 due east of the City of Black Hawk, Colorado. The proposed MMRR Quarry is located in Gilpin County at or neaz Section 26, Township 3 South, Range 72 West of the u 6th Principle Meridian. A The proposed quarry is within distances of concern to a number of receptors including the BHCCSD i Wastewater Treatment Plant, associated sanitary sewer lines (underground), highway lighting owned, operated, and maintained by SDMD, a gasoline/retail convenience store, potable water wells associated with the wastewater treatment plant and the convenience store, and State Highway 119 itself. Structure, Significant, Valuable, and Permanent Man-made is defined at Colorado DMG Construction Material Rule (CMR)1.1 (48) to mean "a nonportable improvement to real property which has defined, current and recognizable value of an economic nature; generally including but not limited to: buildings, houses, barns, fences, above or below ground utilities, irrigation ditches, maintained or public roads, bridges, railroad tracks, cemeteries, communication antennas, pipelines, water wells, water storage structures, discharge and conveyance structures, etc." CMR 6.4.19 Exhibit S -Permanent Man-made Structures states: Where the mining operation will adversely affect the stability of any significant, valuable and permanent man-made structure located within two hundred (200) feet of the affected land, the applicant may either: (a) provide a notarized agreement between the applicant and the person(s) having an interest in the structure, that the applicant is to provide compensation for any damage to the structure; or (b) where such an agreement cannot be reached, the applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation; or. ~ Leonard Rice Engineers, Inc. November 10, 2005 -Job No. 108tiBCS03D