Department of Environmental Quality

DEQ Home/ Land Quality/ Environmental Cleanup/ ECSI/ Site Summary

Environmental Cleanup Site Information (ECSI) Database Site Summary Report - Details for Site ID 4418, Oregon Bonanza Mine

This report shows data entered as of June 19, 2018 at 10:38:52 AM

This report contains site details, organized into the following sections: 1) Site Photos (appears only if the site has photos); 2) General Site Information; 3) Site Characteristics; 4) Substance Contamination Information; 5) Investigative, Remedial and Administrative Actions; and 6) Site Environmental Controls (i.e., institutional or engineering controls; appears only if DEQ has applied one or more such controls to the site).  A key to certain acronyms and terms used in the report appears at the bottom of the page.

Note: DEQ may have posted online documents related to this site. If so, they would be available for viewing or downloading on ECSI Summary Page

Go to DEQ's Facility Profiler to see a site map as well is information on what other DEQ programs may be active at this site.

Environmental Cleanup Site Information (ECSI) Database Site Summary Report - Details for Site ID 4418, Oregon Bonanza Mine

General Site Information

Site ID: 4418 Site Name: Oregon Bonanza Mine CERCLIS No:
Address: 38S/5W/S16  
  County: Josephine Region: Western
Other location information: (10-18-05;KLS/SAS) The former Oregon Bonanza Mine Site is located in the Lower Applegate Area Mining District at an elevation of approximately 2,100 to 2,300 feet above mean sea level. Approximately 1,300 feet of mine workings were located on the south side of the Powell Creek drainage just over 3 miles north of Williams in Section 16 of Township 38 South, Range 5 West in Josephine County (Figure 1 and 2). Eighty acres of land were patented and the tax lot is currently zoned forest commercial (FC).
Investigation Status: Suspect site requiring further investigation
Brownfield Site: No NPL Site: No Orphan Site: No Study Area: No
Property: Twnshp/Range/Sect: 38S , 5W , 16 Tax Lots: 001200
  Latitude: 42.2622 deg. Longitude: -123.2893 deg.  Site Size: Approx. 80 acres
Other Site Names:

Site Characteristics

General Site Description:
Site History: (10-18-05;KLS/SAS) The early history of the mine is unreported. In 1936, the property was purchased by R.C. Hanford and associates from Edward Layton. In 1939, the Powell Creek Mining Company took possession of the mine [Oregon Metal Mines Handbook, 1951]. From 1936 through 1940, the mine was operated continuously with roughly 1,300 feet of underground workings, including shafts. The equipment on site included a compressor, a drifter, a stoper, a hoist, a blower with air pipe, a gas engine, a ton mine car, 2 pumps, a compressor house and a shed. The historical reports did not mention the presence of a stamp mill; the ore was reportedly hand sorted and shipped to a mill at the nearby Humdinger Mine. By 1940, the mine buildings were in ruin and the adits were caved in [Gold and Silver in Oregon, 1968].
Contamination Information:
Manner and Time of Release:
Hazardous Substances/Waste Types:
Environmental/Health Threats:
Status of Investigative or Remedial Action: (10-18-05;KLS/SAS) Based on the available information for the former Oregon Bonanza Mine, DEQ finds that further action is necessary. DEQ recommends that an expanded preliminary assessment (XPA) be conducted. The XPA should include, but not necessarily be limited to, a site inspection and evaluation of:

the nature and extent of mining wastes including the types and concentrations of metals in the waste rock pile and the drainage pit; and
the potential future use of the property and potential risks to human health or the environment such as exposure to contaminated soil.

The XPA should include sampling of surface soil and mine wastes. Samples should be analyzed for metals including arsenic, lead, and iron as well as PCBs and petroleum products. Other analyses may also be warranted.

The priority for further action at the Site is considered low based on the Site Assessment Prioritization System (SAPS) score.
Data Sources:

Substance Contamination Information

Substance Media Contaminated Concentration Level Date Recorded
No information is available

Investigative, Remedial and Administrative Actions

Action Start Date Compl. Date Resp. Staff Lead Pgm
State Expanded Preliminary Assessment recommended (XPA)  (Primary Action) 10/18/2005 10/18/2005 Kristy Sewell SAS
View Full Report Showing Action History

Key to Certain Acronyms and Terms in this Report:

You may be able to obtain more information about this site by contacting Kristy Sewell at the Western regional office or via email at If this does not work, you may contact Gil Wistar at (503) 229-5512, or via email at or contact the Western regional office.