Hidden Valley Landfill (Thun Field)

Regulatory timeline

1. June 10, 1986Proposed for the NPL
2. March 31, 1989Established on the NPL (final listing)
3. September 28, 2000Construction completed

Projected reinspection cycle

CERCLA requires a five-year review while hazards remain on site. These dates are projected from this site's cleanup timeline — they are estimates, not EPA-published dates. Check the site progress profile for the actual review schedule.

1. September 28, 2025Projected five-year review (reinspection), cycle 5
2. September 28, 2030Projected five-year review (reinspection), cycle 6
3. September 28, 2035Projected five-year review (reinspection), cycle 7

Official EPA records