# Relationship history for MSHA mine 1508105

Current hierarchy: **Thomas R  Hamilton → Nally & Hamilton Enterprises, Inc. → Hamilton Tipple**

- 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:** Thomas R  Hamilton et al → Hamilton Tipple; 1974-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy E  Hamilton et al → Hamilton Tipple; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Company Inc → Hamilton Tipple; 1975-03-03 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy E  Hamilton et al → Bledsoe Coal Company Inc; 1975-03-03 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Processing Company Inc → Hamilton Tipple; 1979-02-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Geo-Energy Ltd → Hamilton Tipple; 1979-02-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Geo-Energy Ltd → Bledsoe Coal Processing Company Inc; 1979-02-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul J  Sturgill → Hamilton Tipple; 1983-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Elk Creek Coal Company Inc → Hamilton Tipple; 1985-04-01 to 1987-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Big Elk Creek Coal Company Inc; 1985-04-01 to 1987-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → Hamilton Tipple; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interstate Coal Company Inc → Hamilton Tipple; 1987-10-15 to 1995-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Interstate Coal Company Inc; 1987-10-15 to 1995-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Corporation → Hamilton Tipple; 1995-06-20 to 2010-02-10; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Hamilton Tipple; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bledsoe Coal Corporation; 1995-06-20 to 2010-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Nally & Hamilton Enterprises, Inc. → Hamilton Tipple; 2010-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Hamilton et al → Nally & Hamilton Enterprises, Inc.; 2010-02-11 to current/open; source msha-controller-operator-history