All 136 lake bridge drill shafts were constructed on A. H. Beck barges using a A. H. Beck manufactured custom hydraulic drill attached to 135 ton Lieberr. A 50’ x 60’ barge was used to provide 3,560 cyds. of specially designed mix using A. H. Beck Volumetric mixers. A total of 3200 tons of rock, 2700 tons of sand and 1500 tons of cement had to be ferried out onto lake to produce the concrete. Permanent Casing was used on all lake piers. Water depths ranged from 4’ along the banks to 24’ at deepest points.
GENERAL CONTRACTOR: Austin Bridge & Road
OWNER: CPS Energy San Antonio