I-580 WESTBOUND HOV LANE ($135M)
Alameda County Congestion Management Agency
Development of drainage and signage contract documents and construction support for two construction contracts including preparation of drainage, water pollution control and sign sheets, technical specifications, cost estimate and Storm Water Data Report
Widen westbound I-580 to construct a new HOV lane from west of Greenville Road Undercrossing to the San Ramon Road/Foothill Road Overcrossing – a distance of approximately 13 miles. The project also includes bridge widening, extensive retaining walls, and ramp improvements.