Black Crack fissure - photo and video

[Frank S]

I would probably pump 2part fast expanding closed cell foam along the thing until it was sealed over or pump a mud slurry into it until it was full, but then again I am also an advocate for bulldozing and blasting out a footing to construct a mile thick dam across the lower end of big ditch in Arizona eventually allowing it to fill to the brim with the water of the Colorado river