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1 <br />ENGINEERING DYNAMICS, INC. <br />NOISE/VIBRATION CONTROL FoR MINES AND QIIARRIES <br />Cooley Gravel Company - South Quarry: Noise impact assessment and <br />compliance monitoring plan to meet Commerce City's restric- <br />tions on nighttime operations (19931. <br />Cooley Gravel Company - Morrison Quarry: <br />abatement services for Cooley sinc <br />designed and fabricated an electronic <br />and wind speed and verify complianc <br />requirements for a 24-hour operating <br />tion measurements confirmed that haul <br />EDI has provided noise <br />e 1977. In 1991, EDI <br />system to monitor noise <br />e with Jefferson County <br />permit. Post-installa- <br />truck noise transmitted <br />to the nearby Willowbrook subdivision was <br />ry limits. <br />well within statuto- <br />Cooley Gravel - Asphalt Batch Plants: EDI provided noise impact <br />assessment and mitigation design for the Thornton Plant in <br />Adams County, CO (1990) and the Sedalia Plant in Douglas <br />County, CO (1989). <br />Sheep Mountain Quarry - Jefferson County, CO: Noise impact <br />assessment and abatement design covering various operating <br />plans and haul truck routes; extensive testimony at public <br />hearings and before the Jefferson County Commission (1988-92). <br />New World Mine EIS - Park County, Montana: First and Second <br />Completeness Reviews covering ambient noise; traffic noise; <br />blast overgressure; equipment noise levels during development, <br />production and reclamation; noise contours; MSHA noise limits <br />for workers and noise levels at worker housing; noise trans- <br />mission to campground sites; effect on wildlife (including <br />endangered species); noise from avalanche control; and <br />powerline corridor noise. The project is 2 miles southwest of <br />the Absaroka-Beartooth Wilderness Area, and 2 miles northeast <br />of Yellowstone National Park (1991). <br />Eastside Coal Company - Silt, CO: Noise assessment for an expan- <br />sion of mine operations; including ambient baseline noise and <br />emissions from mine equipment, employee vehicles, and haul <br />trucks. Data was presented to Garfield County Commissioners <br />and to the Planning & Zoning Commission (1991). <br />New Castle Energy Company - Garfield County, CO: First and Second <br />Completeness Reviews of the environmental assessment report <br />for the Ridge No. 1 coal mine near New Castle, CO. The <br />project was approved with noise control stipulations (1990). <br />Montanore Project EIS - Lincoln County, MT: Noranda Minerals' <br />proposed Montanore Mine is located in northwestern Montana, <br />east of the Cabinet Mountains Wilderness Area, and includes an <br />underground mine, mill, tailings impoundment, water disposal <br />erx~ineerir~g dyr~crnics <br />