Superfund Repository & Library

Use the search box below to find official documents and research. The box can will search by id number, title, rdu, ou, and author.

Operable Units

1) Mill Creek

2) Flue Dust

3) Old Works/East Anaconda Development Area
(OW/EADA)—This OU is divided into sub-areas.
  • Golf Course
  • Industrial Area   (this includes the Arbiter Complex)
  • Red Sands
  • East Anaconda Yards
  • Drag Strip
  • Mill Creek Addition
  • Aspen Hills 

4) Community Soils

5) Anaconda Regional Waste, Water and Soils (ARWW&S)—This OU is divided into fifteen Remedial Design Units.
  • Stucky Ridge
  • Lost Creek
  • Smelter Hill Uplands
  • Anaconda Ponds
  • Rail Road / Blue Lagoon
  • South Opportunity
  • North Opportunity
  • Opportunity Ponds
  • Fluvial Tailings
  • Warm Springs Creek
  • Cashman Concentrate
  • Slag
  • Old Works Groundwater
  • Smelter Hill facility
  • Mt. Haggin Uplands

Operable Unit 5 Remedial Design Units' (RDUs) Areas and Explanation:
RDU's 1 – 7
RDU 8 – 15

RDU Map
Click to enlarge.

Site Overview


Use the Site Overview to garner information on the different Operable Units and Remedial design units.

Help & Contact


If you have trouble searching feel free to email or call the Arrowhead Foundation for assistance on the contact page.