# Relationship history for MSHA mine 4406537

Current hierarchy: **Addington Bill → Two M Coal Company Inc → Mine #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Roger  Coleman → Mine #1; 1981-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amvest Corporation → Mine #1; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Murphy Ronald D → Mine #1; 1988-10-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Murphy Mining Inc → Mine #1; 1989-08-01 to 1993-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Murphy Ronald D → Mc Murphy Mining Inc; 1989-08-01 to 1993-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Big Fist Coal Company → Mine #1; 1993-05-07 to 1995-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Coleman → Big Fist Coal Company; 1993-05-07 to 1995-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Davis Jerry M Et Al → Mine #1; 1993-11-10 to 1995-07-05; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Coal Company Inc → Mine #1; 1995-01-04 to 1995-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Amvest Corporation → Powell Mountain Coal Company Inc; 1995-01-04 to 1995-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Thor Coal Mining Company → Mine #1; 1995-01-31 to 1995-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Davis Jerry M Et Al → Thor Coal Mining Company; 1995-01-31 to 1995-07-05; source msha-controller-operator-history
- **operator_operates_mine:** Two M Coal Company Inc → Mine #1; 1995-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Addington Bill → Mine #1; 1995-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Addington Bill → Two M Coal Company Inc; 1995-07-06 to current/open; source msha-controller-operator-history