The Columbus Downtown Development Corporation will restore 7,000 linear feet of the Scioto River while creating 33 AC of new green space for the city. The project will improve the health of the river and community, creating an attractive destination. Over time, the Main Street Dam had altered the natural channel and over-widened the river banks having an adverse effect on the river’s health. The dam will be removed and the river re-engineered to reduce the width from 550 feet to 210 feet. This will be done by building embankments and retaining structures within the limits of the existing riverbed to support parks, trails and recreational activities while retaining storage capacity in the event of a flood.
We assessed impacts of excavating near existing river structures including seven railroad/highway bridges, a major trunk sewer, and the addition of new river embankments. This included drilling and sampling from a barge-supported drill rig. The weight impact of embankment fill on the trunk sewer was modeled using finite-difference methods. Designs for drilled shaft and auger cast-in-place pile retaining structures were developed for decorative wall and entertainment features.