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TO: <br />FROM: <br />.DATE: <br />SUBJECT: <br />James E. Chandler <br />County Administrator <br />DIVISION HEAD CONCURRENCE: <br />Robert M. Keatng, , CP <br />Community Developme toDirector <br />Boling, AICP <br />Development <br />THROUGH: Stan <br />Chief, Current <br />John W. McCoy, <br />Staff Planner, <br />vAt <br />Current Development <br />October 19, 1989 <br />A REQUEST TO AMEND SECTION 25.1(t)b.5.6 RELATING TO <br />THE REQUIRED SEPARATION DISTANCE BETWEEN MINING <br />OPERATIONS AND SUBDIVISIONS HAVING NO PUBLIC WATER. <br />is requested that the data herein presented be given formal <br />consideration by the Board of County Commissioners at its regular <br />,,meeting of November 28, 1989. <br />�% y• ;. <br />BACKGROUND AND PROPOSED REQUEST: <br />L. <br />.Mosby and Associates Inc. has submitted an ordinance amendment on <br />rtehalf-of Todd Smith to amend the mining special exception specif- <br />w is land use criterion that requires a separation distance between. <br />:ymining operations and platted subdivisions that have no public <br />.water service. _The specific land use criterion currently reads: <br />"6. The site must not be located within one thousand (1,000) <br />feet of any platted subdivision that is not serviced by <br />public water." <br />This .provision . was put in place to help protect homes on .platted <br />lots with wells from adverse groundwater impacts of mining and <br />de -watering. Oftentimes de -watering occurs in conjunction with <br />mining operations. This de -watering can lower the ground water <br />table surrounding the subject site and can adversely affect <br />shallow wells used by single family residences. The applicant is <br />requesting that the criterion be modified to allow mining that <br />:_..does not involve de -watering closer than 1000' to a platted <br />subdivision that has no public water service. <br />At its regular meeting of October 26, 1989, the Planning and <br />"'::Zoning Commission voted 6 to 1 to recommend approval of the <br />: ordinance revision to the Board of County Commission. <br />ANALYSIS: <br />The subject criterion as it stands does not take into account the <br />fact that some types of mining operations do not remove and/or <br />circulate any groundwater. These types of "non -de -watering" <br />mining can be wet or dry operations. In a wet mining operation, <br />an operator could extract material from a pit with a dragline or <br />other device and pile material until it is loaded into trucks for <br />distribution. Wet digging would occur within the groundwater yet <br />the groundwater table would remain constant. <br />In a "non -de -watering" dry mining <br />strip material via a bull dozer <br />groundwater table. The material <br />NOV 28 Od9 <br />operation, the operator would <br />or other machine down to the <br />would be stockpiled and then <br />13 <br />6 <br />BOOK F'' ��. 0 <br />