The project A 30 x 30ft raw water intake tunnel was planned for Lake Travis’ new Water Treatment Plant. Case Foundation was brought in to drill the shafts allowing pipe piles to support the structure. The challenge The work had to be completed from an oshore oil rig type platform, perched almost 70 feet above water, with drilling down to a nal depth of 263ft. The solution Lake Travis - raw water intake tunnelCase installed large diameter shafts to this extreme depth and completed the work safely and ahead of schedule. Using a Wirth pile top reverse circulation drill rig, Case Foundation drilled a 12ft, 6 inch diameter shaft 90ft into the bedrock stratum, with an overall depth of 263ft from the drill platform to the tip of shaft – the largest and deepest Case Foundation has ever installed

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