Rathburn-Petray Mercury Mine EE/CA, Ukiah Field Office, Bureau of Land Management California

U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
California

Ukiah Field Office

Project Number 7468-010

REVISED DRAFT

ENGINEERING EVALUATION / COST ANALYSIS (EE/CA)

RATHBURN - PETRAY MERCURY MINE

BEAR CREEK WATERSHED

Colusa County, California

Contract Number: NAB030001

Order Number: NAD06EE27

Requisition / Reference Number: R-0609851 / 0001

July 2008

Prepared for:

Bureau of Land Management

2800 Cottage Way

Suite W-1834

Sacramento, California 95825 - 1886

Prepared by:

Ecology and Environment, Inc.

4888 Pearl East Circle, Suite 108

Boulder, Colorado 80301

Rathburn-Petray Revised Draft EE/CA 08-04-08

Table 8-1: Comparative Alternative Analysis
Figure 2-1: Site Location Map
Figure 3-1: Sample Locations
Figure 4-1: Site Conceptual Exposure Model
Figure 7-1: Alternatives - Site Features
Figure 7-2: Alternatives - Petray North
Figure 7-3: Alternatives - Petray South
Figure 7-4: Alternatives - Rathburn North
Figure 7-5: Alternatives - Rathburn South
Figure 7-6: Alternative 5 - Offsite Disposal
Appendix A: Cost Estimates
Appendix B: Photographs
Appendix C: Supporting Data and Documents