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Continue to ChatTunnel Number 6 Map - Malheur County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1116738-tunnel-number-6
Tunnel Number 6 Map - Malheur County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1116738-tunnel-number-6