Mac and Black Jack Mines: Technical Reports

Technical reports related to Mac and Black Jack Mines, located in the Smith Lake Chapter and Mariano Lake Chapter of the Navajo Nation. The Sites include Mac No. 1, Mac No. 2, Black Jack No. 1, and Black Jack No. 2.

• Mac and Black Jack Mine EE/CA Report (pdf) (136 MB, October 6, 2023)
  Final Engineering Evaluation/Cost Analysis (Final EE/CA) report on the Mac and Black Jack mine sites, located in the Smith Lake Chapter and Mariano Lake Chapter of the Navajo Nation. The Sites include Mac No. 1, Mac No. 2, Black Jack No. 1, and Black Jack No. 2.
• Removal Site Evaluation (RSE) and Interim Removal Action Phase 1 Report (pdf) (14.2 MB, August 22, 2017)
  This report characterizes the lateral extent of contamination along with the geological formations of the four Mac and Black Jack Mines.
• Removal Site Evaluation (RSE) and Interim Removal Action Phase 2 Report (pdf) (11.6 MB, June 12, 2025)
  This report provides information of the mitigation of physical hazards at the Mac and Black Jack Mines.
• Removal Site Evaluation (RSE) and Interim Removal Action Phase 3 Report (pdf) (18.9 MB, September 10, 2018)
  This report summarizes the soil sampling results and defines the vertical extent of contamination of the Mac and Black Jack Mines.