Twin Cities Army Ammunition Plant

The Twin Cities Army Ammunition Plant was a United States Army ammunition plant located in Ramsey County, Minnesota in the current boundaries of the suburbs of Arden Hills and New Brighton, bounded by County Road I to the north, I-35W to the west, U.S. Route 10 to the southwest, County Highway 96 to the south, and Lexington Avenue to the east.

[2] The soil, sediments, groundwater, and surface water surrounding the plant were contaminated with base neutral acids, metals, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, volatile organic compounds, pesticides, cyanide, and explosives.

The Minneapolis-Saint Paul area emerged as a potential GOCO candidate primarily on the basis of labor supply.

In April 2013, the County executed a competitively bid contract with Carl Bolander & Sons of St. Paul for the demolition of all structures on site, and the full remediation of the site to residential soil values [6] As of October 2013, Bolander and Sons had removed all of the above grade buildings but one, and had begun soil remediation activities.

The JDA meets monthly, on the first Monday of the month, at Arden Hills City Hall at 5:30 p.m.[7] In 1987 the TCAAP was positively identified as the source of Volatile organic compound (VOCs) contamination in New Brighton's water supply, first identified in July 1981.