Rockwell International Corp Allegan Plant

⚠ Superfund · Ready for anticipated reuse

The site’s long-term remedy prescribed in a 2002 Record of Decision (ROD) and an associated 2016 ROD Amendment addressed source materials and contaminated soil and groundwater.

Location

CityAllegan
CountyAllegan County
StateMichigan
Coordinates42.53667, -85.85000

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 07/01/1983
  2. Proposed to the National Priorities List — 04/10/1985
  3. Finalized on the National Priorities List — 07/22/1987
  4. Remedial Investigation Started — 03/31/1988
  5. Remedy Selected — 07/11/1995
  6. Final Remedy Selected — 09/30/2002
  7. Final Remedial Action Started — 04/19/2005
  8. Construction Completed — 09/27/2016
  9. Deleted from National Priorities List — Not Yet Achieved
  10. Most Recent Five-Year Review — 04/14/2025

EPA references

Understanding this Superfund site

Rockwell International Corp Allegan Plant is a federal Superfund site in Michigan. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.

Current status: Ready for anticipated reuse. EPA considers this site ready for anticipated reuse, meaning cleanup has progressed enough for certain land uses. This does not necessarily mean all contamination has been removed — institutional controls like deed restrictions may limit how the land can be used.

EPA has identified 10 contaminants of concern at this site, including 2-methylnaphthalene, 9h-fluorene, aroclor 1254. Contamination has been detected in solid waste, free-phase napl, groundwater, soil.

If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.