# Relationship history for MSHA mine 1512875

Current hierarchy: **Florida Progress Corporation → Kentucky May Coal Company Inc → Cub Branch**

- 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:** Transcontinental Energy Corp → Cub Branch; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → Cub Branch; 1975-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Transcontinental Coal Company Inc → Cub Branch; 1981-05-01 to 1985-09-08; source msha-controller-operator-history
- **controller_controls_operator:** Transcontinental Energy Corp → Transcontinental Coal Company Inc; 1981-05-01 to 1985-09-08; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Coal & Dock Company Inc → Cub Branch; 1981-06-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amber Coal Company Inc → Cub Branch; 1985-09-09 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Amber Coal Company Inc; 1985-09-09 to 1988-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Smith Daniel F → Cub Branch; 1988-09-27 to 1992-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Somerset Coal Company → Cub Branch; 1988-11-01 to 1989-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Coal & Dock Company Inc → Somerset Coal Company; 1988-11-01 to 1989-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Amber Coal Company Inc → Cub Branch; 1989-03-24 to 1989-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Amber Coal Company Inc; 1989-03-24 to 1989-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Danmar Coal Company → Cub Branch; 1989-06-22 to 1991-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Smith Daniel F → Danmar Coal Company; 1989-06-22 to 1991-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Cub Branch; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hobart  Anderson  et al → Cub Branch; 1990-03-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sarah Ashley Mining Company Inc → Cub Branch; 1991-06-11 to 1992-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Hobart  Anderson  et al → Sarah Ashley Mining Company Inc; 1991-06-11 to 1992-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Blankenship → Cub Branch; 1992-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dynasty Coal Inc → Cub Branch; 1992-10-17 to 1995-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Blankenship → Dynasty Coal Inc; 1992-10-17 to 1995-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Letcher County Coal Inc → Cub Branch; 1995-07-11 to 1996-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Lyon → Cub Branch; 1995-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Lyon → Letcher County Coal Inc; 1995-07-11 to 1996-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Cub Branch; 1996-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1996-03-29 to current/open; source msha-controller-operator-history