National Environmental Policy Act (NEPA)

Walnut Hill Roadway Extension

City of Dallas and Dallas County, Texas

Preliminary Environmental Corridor Screening

dse is providing preliminary environmental screening of an approximate one-mile segment of a planned urban arterial roadway corridor in south Dallas, Texas. The screening is intended to provide information and data to support preliminary roadway planning efforts. The proposed alignment passes through an area with historical industrial activities, landfills, and sand and gravel operations. Efforts include literature and map reviews, limited soil vapor and soil sampling, and verification of the potential for other environmental conditions such as threatened and endangered species, floodplains and jurisdictional wetlands. Soil vapor and soils data indicated the presence of elevated concentrations of methane and chlordane along the project corridor. dse summarized this screening effort in a report that outlines the results of the field efforts, identifies other potential concerns found during the screening, and provides concepts for addressing the identified concerns.