Sterling Construction sees the silver lining even in wastewater and pavement. The heavy civil construction company specializes in the building, reconstruction, and repair of transportation and water infrastructure. The general contractor and its subsidiaries (Texas Sterling Construction, Ralph L. Wadsworth Construction, and Road and Highway Builders) primarily serve public sector clients in Texas, Utah, and Nevada. State highway and bridge work accounts for about 70% of Sterling's revenues. Transportation projects include excavation and asphalt paving of highways and roads, as well as construction of bridges and rail systems. Water projects include work on sewers and storm drainage systems.