But they have to keep the spillway above the hole from failing by being undercut by the water.
But they have to keep the spillway above the hole from failing by being undercut by the water.
Nothing 48 hours of drying and prep followed by 120,000 1/3 cubic yard helicopter delivered buckets of high-early ready mix concrete on top of 500 gabions of one foot diameter rip-rap couldn’t take care of in a heartbeat.
Only problem is that those buckets at one every 30 seconds would take one thousand hours to drop in place.