Superfund Explanation of Significant Difference for the Record of Decision (EPA Region 8): Silver Bow Creek/Butte Area, Silver Bow and Deer Lodge, MT, August 31, 1998
This document presents an Explanation of Significant Differences from the Record of Decision (ROD) for one Streamside Tailings Operable Unit (SSTOU) of the Silver Bow Creek/Butte Area National Priorities List (NPL) Site. The significant differences discussed in this ESD are: An increase in the volume of tailings/impacted soil in the operable unit; Modifications to the alignment of Silver Bow Creek and the channel profile (i.e., elevation profile); Use of a temporary stream diversion during and after construction to facilitate dewatering and excavation of near-stream tailings and to enhance floodplain and streambank revegetation efforts; Changes in the criteria for in-stream sediment removal as a result of other design changes; Modifications to the mine waste relocation repository (MWRR) design; The inclusion of sediment basins to contain contaminated overland flow run-on from off-site mine waste sources; Elimination of treatment wetlands as the end land use in Subarea 1; Changes in the estimated schedule to implement the SSTOU remedy; and An increase in the estimated cost of the SSTOU remedy.
- Research Organization:
- Environmental Protection Agency, Office of Emergency and Remedial Response, Washington, DC (United States)
- OSTI ID:
- 6481843
- Report Number(s):
- PB-98-963125/XAB; EPA-541-R98-116
- Resource Relation:
- Other Information: See also PB96-964402
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superfund Record of Decision (EPA Region 8): Silver Bow Creek/Butte Area NPL site, Warm Springs Ponds Operable Unit, Upper Clark Fork River Basin, MT. (First remedial action), September 1990
Superfund Record of Decision (EPA Region 8): Silver Bow Creek/Butte Area, MT. (Second remedial action), June 1992. Interim report
Related Subjects
ARSENIC
CADMIUM
COPPER
MONTANA
POLLUTION CONTROL
REMEDIAL ACTION
SEDIMENTS
SOILS
US SUPERFUND
ZINC
CONTROL
DEVELOPED COUNTRIES
ELEMENTS
LAWS
METALS
NORTH AMERICA
POLLUTION LAWS
SEMIMETALS
TRANSITION ELEMENTS
USA
540250* - Environment
Terrestrial- Site Resource & Use Studies- (1990-)
540350 - Environment
Aquatic- Site Resource & Use Studies- (1990-)