Ukiah Field Office

Chicago & Research Mercury Mines Draft Engineering Evaluation and Cost Analysis

Historic photograph of a retort (furnace) at the Chicago Mercury Mine

Notice of Public Availability of the Administrative Record For the Chicago and Research Mines

The Bureau of Land Management (BLM) announces the availability, for public review and comment, of the Administrative Record and the draft Engineering Evaluation and Cost Analysis (EE/CA), for the Chicago and Research Mine sites (the Site), located near the town of Middletown, in Lake County, CA.  The Administrative Record is the file containing all documents which the BLM has used to support its decisions on appropriate response actions to be taken at the Site. The BLM is performing a “non-time critical” removal action at the Site pursuant to the Comprehensive Environmental Response Compensation and Liability Act of 1980, as amended. The EE/CA will identify the BLM’s preferred alternative for the response actions to be taken at the Site. Other documents will be added to the Administrative Record as cleanup work progresses. The EE/CA and Administrative Record is available for review during normal business hours, Monday – Friday, from 7:45 a.m. - 4:30 p.m. at the BLM’s Ukiah Field Office, located at 2550 N. State St., Ukiah, CA. 

The Chicago and Research mines site is located in the Dry Creek Mining District southwest of Middletown. The Chicago Mine was located in the 1860s and worked intermittently until 1968 when it was quit claimed to the owner of the Research Mine. The Research Mine was located in 1929 and operated intermittently until it closed in 1978. The mines site includes approximately 20 acres of BLM-administered public land.
 
The Bureau of Land Management will hold an open house on December 13, 2011, for review and comment on the draft Engineering Evaluation and Cost Analysis (EE/CA) for the Chicago and Research abandoned mercury mines, located near Middletown in Lake County. The open house will be at The South Lake Fire Protection District Office, 20109 State Highway 175, Middletown, will begin at 7:00 p.m. and is expected to last until 9:00 p.m.
 
The BLM strongly encourages interested members of the public to comment, in writing, on the documents contained in the EE/CA as well as the administrative record. All comments must be received in writing on or before January 6, 2012, to be considered and responded to in the final EE/CA decision. The comment period begins on December 6, 2011.
 
BLM strongly encourages interested members of the public to comment, in writing, on the EE/CA as well as the Administrative Record. Comments received by January 6, 2012, will be considered and responded to in the final EE/CA decision. Comments must be received in writing and can be provided at the open house, through the BLM's website at http://www.blm.gov/ca/ukiah, by email to ChicagoResearchEECA@blm.gov, by fax to (707) 468-4027, or by mail to BLM Ukiah Field Office, attention Gary Sharpe, 2550 N. State St., Ukiah, CA 95482.

DOWNLOADABLE DOCUMENTS

Chicago and Research Mercury Mines EE/CA Report

Appendix A - EECA Field Investigation Summary

Appendix B - Photo Log

Appendix C - HHERA

Appendix D - Field Maps and Volume Calculations

Appendix E - SAIC and ECM Notes

Appendix F - Costs

Chicago-Research Mines Draft EECA Comment Form