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Continue to ChatSeven-Thirty Mine Map - Boulder County, CO https://www.yellowmaps.com/usgs/topo.cfm?map=co-1683748-seven%2Dthirty-mine
Seven-Thirty Mine Map - Boulder County, CO https://www.yellowmaps.com/usgs/topo.cfm?map=co-1683748-seven%2Dthirty-mine