A beautiful day for some field work/spelunking for a 2,000-ft-long culvert in Black Hawk for a LOMR we are completing. Mike and Mat don safety wear to check out culvert slope and conditions.
A beautiful day for some field work/spelunking for a 2,000-ft-long culvert in Black Hawk for a LOMR we are completing. Mike and Mat don safety wear to check out culvert slope and conditions.
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