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Continue to ChatHole-in-the-Ground Map - Lake County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1143660-hole%2Din%2Dthe%2Dground
Hole-in-the-Ground Map - Lake County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1143660-hole%2Din%2Dthe%2Dground