06_Geotech Report DHS Segment O-4(Special) 20080606.pdf

This document provides details for a federal solicitation for design-build services. The United States Section of the International Boundary and Water Commission is seeking proposals for the design and construction of rehabilitation improvements to approximately 800 linear feet of levee at the Edinburg Pump Station in Hidalgo County, Texas. The proposed project includes design and construction of earthen embankment, concrete floodwalls, associated ramps, seepage remediation, raising the levee elevation as needed, additional geotechnical investigations and testing, and assessment of structures within the levee for rehabilitation. Major construction elements comprise preparing right-of-way, stockpiling excavated material, levee widening, erosion control, installing two new sections of floodwall with bollard walls, constructing floodwall foundations, replacing an existing gatewell structure, backfilling and grading embankment material, installing an aggregate roadway surface, removing and replacing chain link fencing, and revegetation.