Atlantic Richfield removes and consolidates ~40,000 cubic yards of impacted materials under the Colorado Smelter TCRA. The Lower Area One Expedited Response Action (ERA)56 is initiated by Atlantic Richfield, eventually removing over 1 million cubic yards of accessible mine waste and tailings along Silver Bow Creek.
A consent order with EPA is signed by Atlantic Richfield and other potentially responsible parties (PRPs) to conduct a Remedial Investigation/Feasibility Study (RI/FS).57
Walkerville TCRA II is completed by Atlantic Richfield,58 addressing 12 additional waste dumps. The Butte Priority Soils ERA for Residential Soils/Source areas begins, leading to ongoing metal abatement for contaminated residential yards and attics under what is now referred to as the Residential Metals Abatement Program (RMAP).59
U.S. EPA issues a Record of Decision (ROD) containing the selected, final remedy for BPSOU.67 Butte-Silver Bow County (BSB) and Atlantic Richfield68 reach an agreement that provides funding to BSB to complete certain portions of the remedy. The Butte Historic Landmark District is expanded. Design and construction of the final BPSOU remedy begin.69 The Butte lead abatement program is re-named the "Residential Metals Abatement Program," building on the multi-pathway program initiated by U.S. EPA with funding from Atlantic Richfield in 1994, in cooperation with Montana DEQ and Butte-Silver Bow County.70
Butte Reclamation Evaluation Program begins.71
Upgrades of the subgrade vault pumping system and control building of the MSD subdrain system are completed by Atlantic Richfield.72
The State, the U.S., and Atlantic Richfield reach a final settlement for remediation of the upper Clark Fork River site and settle all remaining State claims for natural resource damages and restoration costs for Butte Area One, the Smelter Hill Uplands, and the upper Clark Fork River.73
Atlantic Richfield completes the Granite Mountain Memorial75 and begins Silver Bow Creek stream bank and floodplain removal near the confluence with Blacktail Creek.
Atlantic Richfield expands groundwater capture system of Lower Area One76 during the Butte Reduction Works Open Area Excavation project.
EPA reports that the majority of capping is complete.77
February 4—US EPA releases an amended Record of Decision for the Butte Priority Soils Operable Unit and portions of the Butte Area site.
February 13—US EPA, the State of Montana, the consolidated City and County government of Butte-Silver Bow (BSB) and Atlantic Richfield Company announce a proposed partial Consent Decree for the Butte Priority Soils site.