I-83 at 29th Street Bridge Repairs, MD State Highway Administration (SHA)

Baltimore, MD

Geotechnical oversight for subsurface exploration using GPR and an SPT boring to locate voids beneath 6-lane interstate located at toe of Druid Park Lake Dam, over 50' high. Included construction documents, coordinated with State Dam Safety; shop drawing review; and on-site construction inspection for support of excavation, low-mobility grouting to stabilize approach slab for bridge, high-mobility grouting to fill voids to repair sinkhole damage and reconstruct several storm drains.