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County staff maps known mines, recommends internal dashboard and public education rather than parcel‑level publish
Summary
Staff compiled a countywide list of known mines (39 total; 23 on public lands), proposed an internal geospatial dashboard for planning and a public web page of high‑level educational information, and advised against publishing parcel‑level mine hazard maps to avoid attracting exploration.
County planner Alex Keeble Toole briefed supervisors on a year of stakeholder engagement and a county mines inventory intended to inform planning and public safety work. Staff said they identified 39 known mine sites in Nevada County and noted 23 are on public lands, a distinction that affects remediation options and the county’s ability to leverage…
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