Upstate South Carolina Minimum and Recreational Flow

Upstate South Carolina, South Carolina

Confidential Client

The project includes improvements to two diversion dam structures that create a reservoir in upstate South Carolina. The creation of an in-river recreational whitewater area downstream of the Long Bypass Reach (LBR) diversion dam is one of only a few of its kind in the country and serves as a catalyst for economic development to benefit the surrounding area. This portion of the work included construction of a temporary access road along the riverbed and the installation of approximately 22,912 cu yd of unique concrete structures to train and direct the water through a series of switchbacks and channels.

At the Short Bypass Reach (SBR) diversion, the installation of a pneumatic Obermeyer spillway gate system required significant demolition and reconstruction of the existing concrete spillway crest and installation of post-tensioned stranded rock anchors for dam stability.

Because this project was in and around a river with limited vehicular access, most of the work was performed either in the dry riverbed or via barges. Our team self-performed rock grinding, access road construction in the riverbed, rebar installation, concrete formwork and placement, and mechanical piping. We also provided all marine and hoisting equipment required to support the work.