Fannin County, Texas -- Ever wondered why water doesn’t just seep underneath a dam? A slurry trench—only 3 ft. wide but nearly 60 ft. deep in some areas—explains why.
Crews began work on it just this month. As the trench is dug, it is filled with highly water-resistant materials including bentonite, sand and gravel to form a kind of underground wall.
This wall will be around 23 times less permeable than the regular soil and foundation materials, keeping water from seeping out of the future lake.
