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County staff to begin countywide mineral resource lands analysis; overlay would protect active mines from nuisance claims
Summary
San Juan County planning staff told commissioners they will inventory commercially significant mineral sites, coordinate methodology with state agencies, and propose a Mineral Resource Lands overlay to protect active, permitted operations while maintaining noise and reclamation requirements.
Planning staff told the commission on Nov. 21 that San Juan County will begin a countywide analysis to identify commercially significant mineral resource lands and develop a Mineral Resource Lands overlay (MRO) as part of the periodic comprehensive-plan update.
"The Growth Management Act requires the county to set regulations to conserve natural resource lands," Sofia said, explaining that mineral resource lands (agricultural, forest and mineral resources) must be designated on official maps and that the county previously deferred mapping minerals. Staff said the MRO is intended for commercially significant, active extraction sites and that the county will develop a methodology using state guidance and in coordination with the Department of Commerce and the Department of Natural Resources.
Sofia said the overlay does not change base land-use designations but provides protections for mining operators from nuisance claims while existing county regulations, including the county noise ordinance and DNR permitting and reclamation requirements, still apply. "The county noise ordinance still applies," she said, and DNR surface-mining permits and reclamation plans are important criteria for identifying candidate sites.
Commissioners asked whether all existing gravel pits are on the county's lists; Sofia said staff has a list from six to seven years ago of roughly eight operations that may be commercially significant and will inventory additional sites and provide a report to the commission. Commissioners raised concerns about dust, traffic and storage yards for aggregate materials; Sofia said staff will address those operational questions in future reports and consider whether related code changes are needed.
Staff said they will conduct public hearings and a site-specific redesignation process for any map amendments and aim to complete the work during the periodic update cycle ahead of the 2027 deadline.
