EPA ID# OR7122307658
EPA Region 10
Lake County

2nd Congressional District

Other Names: Lucky Lass/White King Mine, Fremont National Forest Uranium Mines (USDA), Fremont National Forest/White King and Lucky Lass Uranium Mines (USDA)
Last Update: April, 2010

Hide details for Site DescriptionSite Description

The White King Mine is located approximately 18 miles northwest of Lakeview within the Lakeview Ranger District, Fremont National Forest, Lake County, Oregon. The mine is situated on both National Forest land and private land. The Lucky Lass Mine is situated 1 mile northwest of the White King Mine and is also on National Forest land. The nearest residence to the site is 12 miles away. The site encompasses 140 acres affected by uranium mining activities which occurred during the 1950s and 1960s. Major features at the White King Mine include the White King Pond (formed when water collected in an open-pit mine), and two stockpiles of overburden material. The White King pond occupies approximately 13 acres and contains about 80 million gallons of water. The two stockpiles contain a combined volume of almost one million cubic yards of material. Major features a the Lucky Lass Mine include the Lucky Lass Pond and the overburden stockpile. This pond covers approximately 5 acres. The Lucky Lass overburden stockpile covers about 14 acres and contains approximately 260,000 cubic yards of material. The radioactive ore and soil stockpiles at the site pose some risk to residents or recreational users. The White King pond contains acidic water which requires periodic neutralization. The site is typically covered by snow approximately 6 months of the year.

Site Responsibility: This site is being addressed through state and federal actions.

NPL Listing HistoryDates
Proposed Date:06/23/1993
Removed Date:
Withdrawal Date:
Final Date:04/25/1995
Deleted Date:

Show details for Threats and ContaminantsThreats and Contaminants

Hide details for Cleanup ProgressCleanup Progress

Early Actions: Between September 1995 and April 1996, EPA performed an early action during which erosion control measures were installed to protect the ore and soil stockpiles, and to prevent further spreading of contaminants to site soils and the creek.

Pond Neutralization: In August 1998 approximately 9,000 lbs of hydrated lime was applied to the White King Mine Pond in an attempt to neutralize the acidity. Monitoring of the pond continued until November 19, 1998. The results at that time indicated that the pond was neutralized from a pH of 4-5 to 6-7. Further monitoring of the pond was conducted during the summer of 1999. Approximately 10 tons of limestone rock was added to the pond in October 1999 to provide longer term stabilization of the pH. Monitoring of the pond water pH continues on an annual basis.

Long-Term Actions: The Feasibility Study was completed in August 1999 and a Proposed Plan was issued for public comment on October 1, 1999. Two extensions to the comment period were requested which were granted by EPA. The comment period closed on January 10, 2000. The Record of Decision was completed in September 2001. The remedy for the site includes consolidating and capping the most highly contaminated soils from both mine Sites at the White King Mine area and continued neutralization of the acidity in the White King Pond.

EPA completed negotiations with Potentially Responsible Parties (PRPs) to conduct the Remedial Design and Remedial Action. A Consent Decree was published in the federal register October 26, 2005 for a 30 day comment period.
Pursuant to a Unilateral Administrative Order the PRPs completed the remedial design in Spring 2005 and began cleanup work in the Summer of 2005. By October 2005 the PRPs had completed the following activities:

1. Re-contour the White King Protore Stockpile so that it is no longer within the Augur Creek floodplain.
2. Removal of off-pile areas where there is mine-related waste above remediation levels and placement of these material on the regraded Protore Stockpile, referred to in the design documents as the Consolidated Stockpile.
3. Excavation of the White King Overburden Stockpile and placement on the Consolidated Stockpile.
Placement of 20 inches of cover soil on portions of the Consolidated Stockpile.

Beginning in the Summer of 2006 the remaining work at the site was begun. This included placement of final covers at the White King Consolidated Stockpile, re-contouring and covering of the Lucky Lass Overburden stockpile, and construction of a wetland in the vicinity of the former White King Overburden stockpile.

During 2007, 2008, and 2009 an annual operation and maintenance inspection was conducted by EPA, ODEQ, Oregon Department of Energy, and the Forest Service. In addition annual groundwater, pond water, and Augur Creek monitoring were conducted during this period of time. In 2009 repairs were made to the Consolidated Stockpile in order to address damage from erosion in one small area. No additional repairs were required at either the White King or Lucky Lass sites.

The first Five-Year review is scheduled to be completed in May 2010.

Hide details for Regional ContactsRegional Contacts

PHONE NUMBER:206-553-2806
PHONE NUMBER:(503)326-6994
Information pertaining to this site is housed at the following location(s):
Lakeview Ranger District (Administrative Record)
Fremont National Forest
HC 64, Box 60
Lakeview, Oregon 97630

Lake County Library (Administrative Record)
County Courthouse
513 Center Street
Lakeview, Oregon 97630