The Loop 303 Outfall Drainage System project is located just west of Cotton Lane, extending 4-1/2 miles from approximately Van Buren Street south to the north bank of the Gila River through the jurisdictions of the City of Goodyear and unincorporated Maricopa County. The northern portion of the project from Van Buren Street to the Union Pacific Railroad is along the corridor of the planned Loop 303 freeway.
The new outfall drainage system will collect and carry 100-year stormwater runoff to the Gila River and reduce the chance of property damage and flooding the future freeway and adjacent areas during a major storm event. Drainage improvements include construction of a concrete-lined channel, box culverts, storm drain pipe, retaining walls and landscaping. Additional improvements include street and irrigation system reconstruction for the Roosevelt Irrigation District (RID) and Buckeye Water Conservation and Drainage District (BWCDD).