# Relationship history for MSHA mine 4605909

Current hierarchy: **John Mitch Potter → Coal-Mac LLC → Holden No 22 Preparation Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Richard H  Abraham et al → Holden No 22 Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Holden No 22 Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Holden No 22 Preparation Plant; 1978-12-01 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1978-12-01 to 1981-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Enoxy Coal Inc → Holden No 22 Preparation Plant; 1982-01-01 to 1988-07-20; source msha-controller-operator-history
- **controller_controls_mine:** ENI → Holden No 22 Preparation Plant; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ENI → Enoxy Coal Inc; 1982-01-01 to 1988-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Holden No 22 Preparation Plant; 1988-07-20 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Mining Company → Holden No 22 Preparation Plant; 1988-07-21 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Mining Company; 1988-07-21 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Holden No 22 Preparation Plant; 1989-10-19 to 1997-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Holden No 22 Preparation Plant; 1993-07-01 to 1994-12-27; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Holden No 22 Preparation Plant; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Island Creek Coal Company; 1993-07-01 to 1994-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Talon Resources Inc → Holden No 22 Preparation Plant; 1994-12-28 to 1999-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Abraham et al → Talon Resources Inc; 1994-12-28 to 1999-10-17; source msha-controller-operator-history
- **controller_controls_mine:** William D  Abraham → Holden No 22 Preparation Plant; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Holden No 22 Preparation Plant; 1997-07-01 to 2019-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Land Company Inc → Holden No 22 Preparation Plant; 1999-10-18 to 1999-11-07; source msha-controller-operator-history
- **controller_controls_operator:** William D  Abraham → Falcon Land Company Inc; 1999-10-18 to 1999-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Ace Trucking Inc → Holden No 22 Preparation Plant; 1999-11-08 to 2001-01-07; source msha-controller-operator-history
- **controller_controls_mine:** James R  Grimmett → Holden No 22 Preparation Plant; 1999-11-08 to 2001-01-07; source msha-controller-operator-history
- **controller_controls_operator:** James R  Grimmett → Ace Trucking Inc; 1999-11-08 to 2001-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Lewis et al → Holden No 22 Preparation Plant; 2000-10-01 to 2006-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Rio Group Inc → Holden No 22 Preparation Plant; 2001-01-08 to 2003-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Lewis et al → Rio Group Inc; 2001-01-08 to 2003-07-16; source msha-controller-operator-history
- **controller_controls_operator:** William B  Brown Jr et al → Rio Group Inc; 2001-01-08 to 2003-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Coal-Mac LLC → Holden No 22 Preparation Plant; 2003-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Coal-Mac LLC; 2003-07-17 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Coal-Mac LLC; 2003-07-17 to 2019-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Abraham et al → Holden No 22 Preparation Plant; 2006-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Abraham et al → Rio Group Inc; 2006-10-02 to 2003-07-16; source msha-controller-operator-history
- **controller_controls_mine:** John Mitch Potter → Holden No 22 Preparation Plant; 2019-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Mitch Potter → Coal-Mac LLC; 2019-10-23 to current/open; source msha-controller-operator-history