2024-08-05_REVISION - M1986123 (4)

Home Browse Search

Findings and Resolution Stroh Pit Special Revie-*c Page 7 so additional noise may be perceived as an impact. Applicant updated its professional noise study in February 2018 to add significantly more detail and acoustical data to the analysis as well as additional mitigation to insure all noise generated from the mining operation will be less than 55 dba at any surrounding residential property line. Applicant's noise engineer testified that in measuring noise to determine that noise created only by the mining operation, ambient noise is measured and eliminated from the determination using a scientific calculation. The County Health Department representative confirmed this. Ambient noise is not added to the noise generated by applicant in determining whether applicant exceeds the 55 dba limit. Further review of the application indicated the technical standards required for the approval of this application and demonstrated that it will not result in a substantial adverse impact. Applicant stated that it will mitigate noise by designing the site with large setbacks, installing 10-1-5 foot berms around the pit areas, positioning stockpiles to shield noise, installing a conveyor system, using white noise backup alarms, and implementing noise monitoring. As to concerns about mining near a petroleum pipeline, applicant noted that there is a steel 8"pipeline that runs north/south and bisects the project. The pipeline has been an integral part of the engineering planning of the project from the beginning. Applicant noted it will take great measures to protect the safety of this pipeline, including construction of soil cement slope stabilization to the adjacent pit slopes to project from erosion if flooding were to occur. This specification was reviewed and approved by the Larimer Countv Flood Review Board. Applicant will stake out and not work within the agreed-upon the 100 foot easement as shown in the site plan. In further addressing impacts on properties and their values, the Board notes that the request is a temporary use (7 years) and will, upon completion of mining. result in lakes/water storage with the potential for enhanced view sheds and wildlife habitat which may increase property values. Absent the mining operation, a potential, if not likely, use of this property will be further residential development. The immediate area has been under development for the past 12 years and will continue to develop for several more. The impacts from development are noise, dust and heavy truck traffic—i.e.,many of the same adverse impacts complained about by persons opposing the mine. e. The recommendations of referral agencies haiv been considered. Referral agency comments were included in materials appended to the Development Services Team Staff Report. The need for air and water quality controls, noise mitigation, safety and integrity of water impoundments, drainage and other issues have been identified, incorporated in the evaluation of the special review application and addressed satisfactorily by the applicant. 7