[meyer]

Good point on the crane. If it isn’t there for some big lifts, then maybe it doesn’t need to be there. I’m guessing maybe to place the rebar pieces or something like that? Don’t know. I do know that that Ditch Witch has a trailer hitch and could have been towed into place.

[EarthResearcher333]

The large crane "reach" may become strategic for the deployment of the rebar "mats" and for concrete "buckets". The original construction of the spillway used conveyors (IIRC) along the hillside for the concrete deployment. A large crane may be more versatile for other needs besides the fast pace assembly of the finish grade concrete slab layer.