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Continue to ChatC and M Gravel Pit Map - Boulder County, CO https://www.yellowmaps.com/usgs/topo.cfm?map=co-1683940-c-and-m-gravel-pit
C and M Gravel Pit Map - Boulder County, CO https://www.yellowmaps.com/usgs/topo.cfm?map=co-1683940-c-and-m-gravel-pit