The Twin Cities Army Ammunition Plant (TCAAP) site is located in the City of Arden Hills, Minnesota, a first-ring suburb of the Minneapolis and St. Paul metropolitan area. The property was part of a government-owned, contractor-operated facility originally used for the production of small arms ammunition during World War II. Additional production facilities and re-tooling of some of the small caliber ammunition shops allowed for production of artillery ammunition beginning in 1944. TCAAP was also used to produce ammunition for the Korean Conflict and the Vietnam Conflict. Production continued through 1976 when the facility was placed on standby status. TCAAP is currently listed as a federal Superfund site due primarily to solvent and heavy metals contamination issues.

The City of Arden Hills and its developer for the site are preparing to receive a land transfer of 585 acres of the TCAAP site for redevelopment. This project represents a unique opportunity for the City to reclaim a major suburban brownfields site.

Since 2002, Tetra Tech’s role in the project has involved reviewing existing site data and identifying gaps in the assessment data; developing and implementing a remedial investigation plan to further define the extent and magnitude of contaminant impacts; interacting with state and federal regulators regarding cleanup standards; and evaluating risk associated with development of the property.

Tetra Tech’s extensive experience in brownfields redevelopment and military base revitalization work will be a key component of the final remedy selections and land use recommendations for the site.

Highlight:
“The redevelopment of the arsenal, particularly the TCAAP Excess Property, will both harmoniously expand and strategically complement and enhance the Arden Hill’s community and region.” –City of Arden Hills, Vision and Goals, Arsenal Reuse, January 2004.