# Relationship history for MSHA mine 1517180

Current hierarchy: **Hayes Clyde L → Laro-Lee Enterprises Inc → Alma #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:** Lester Douglas M & James E Blair → Alma #1; 1976-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** TECO Energy Inc → Alma #1; 1988-04-26 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Ward David R → Alma #1; 1991-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jerold & Jeffrey Coal Company Inc → Alma #1; 1992-01-01 to 1992-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Lester Douglas M & James E Blair → Jerold & Jeffrey Coal Company Inc; 1992-01-01 to 1992-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Company Inc → Alma #1; 1992-10-19 to 1992-11-17; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Company Inc; 1992-10-19 to 1992-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Ultra Coals Inc → Alma #1; 1992-11-18 to 1993-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Ward David R → Ultra Coals Inc; 1992-11-18 to 1993-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Company Inc → Alma #1; 1993-08-05 to 1995-03-30; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Company Inc; 1993-08-05 to 1995-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Laro-Lee Enterprises Inc → Alma #1; 1995-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hayes Clyde L → Alma #1; 1995-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hayes Clyde L → Laro-Lee Enterprises Inc; 1995-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Alma #1; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Company Inc; 2015-09-21 to 1992-11-17; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Company Inc; 2015-09-21 to 1995-03-30; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → Alma #1; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Company Inc; 2019-06-16 to 1992-11-17; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Company Inc; 2019-06-16 to 1995-03-30; source msha-controller-operator-history