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Freeway through a Superfund Site

by Thomas M. Monchak, (M.ASCE), Transportation Mgr.; Daniel, Mann, Johnson, & Mendenhall, Phoenix, AZ,
Charles K. Eaton, (M.ASCE), State Traffic Engr.; Arizona DOT, Phoenix, AZ,


Serial Information: Civil Engineering—ASCE, 1995, Vol. 65, Issue 11, Pg. 56-59


Document Type: Feature article

Abstract:

The Red Mountain Freeway is the centerpiece of a 171 km $2.6 billion system of freeways and expressways under construction in Maricopa County, Ariz. For 3 km in Tempe, the freeway passes through the Indian Bend Wash Superfund Site, which was placed on the National Priorities List in 1983 because of contaminated ground water. To skirt potential hazardous-waste deposits, Arizona DOT is building 1.6 km of the Red Mountain Freeway in the floodplain of the Salt River. Also, the department negotiated with EPA a one-of-a-kind formal Agreement and Covenant Not to Sue under which ADOT would not be responsible for any existing ground-water contamination within the purchased right-of-way and, in return, would clean up all landfill material in the freeway construction work area.

Subject Headings: Highways and roads | Groundwater pollution | Waste sites | Mountains | Infrastructure construction | Construction sites | Construction materials

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