Colfax, N.C. – UMA Geotechnical Construction, a North Carolina-based geotechnical contractor serving the Mid-Atlantic Region, this past May helped its customer avoid failure of retaining wall structures during the demolition of a bridge spanning Blanket Creek in the Winston-Salem area. UMA, under its subcontract with Kernersville, North Carolina-based National Bridge Builders, installed 14 ground anchors on the two…