# Relationship history for MSHA mine 1512807

Current hierarchy: **Donn A  Chickering → Elc Inc → Mine C-22**

- 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:** Hamilton Thelma G & Kerry → Mine C-22; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Branson → Mine C-22; 1972-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Richard Coal Company → Mine C-22; 1981-04-01 to 1981-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Thelma G & Kerry → Richard Coal Company; 1981-04-01 to 1981-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Praise Coal Company → Mine C-22; 1981-08-04 to 1988-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Joseph-John & Bobby → Mine C-22; 1981-08-04 to 1988-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Joseph-John & Bobby → Praise Coal Company; 1981-08-04 to 1988-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Ike Coal Company Inc → Mine C-22; 1988-01-05 to 1988-11-28; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Branson → Ike Coal Company Inc; 1988-01-05 to 1988-11-28; source msha-controller-operator-history
- **controller_controls_mine:** Derek  Potter et al → Mine C-22; 1988-11-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → Mine C-22; 1988-11-29 to 1990-09-03; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Potter et al → Potter Mining Company Inc; 1988-11-29 to 1990-09-03; source msha-controller-operator-history
- **controller_controls_operator:** David W  Potter et al → Potter Mining Company Inc; 1988-11-29 to 1990-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Sunnyside Mines Inc → Mine C-22; 1990-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & L Coal Company Inc → Mine C-22; 1990-09-04 to 1990-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Kyle Lawrence → Mine C-22; 1990-09-04 to 1990-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Kyle Lawrence → S & L Coal Company Inc; 1990-09-04 to 1990-09-20; source msha-controller-operator-history
- **operator_operates_mine:** J & L Coal Inc → Mine C-22; 1990-09-21 to 1991-06-12; source msha-controller-operator-history
- **controller_controls_mine:** James L  Griffith et al → Mine C-22; 1990-09-21 to 1991-06-12; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith et al → J & L Coal Inc; 1990-09-21 to 1991-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Sunnyside Kentucky Inc → Mine C-22; 1991-06-13 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sunnyside Mines Inc → Sunnyside Kentucky Inc; 1991-06-13 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Elc Inc → Mine C-22; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donn A  Chickering → Mine C-22; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Elc Inc; 1992-06-01 to current/open; source msha-controller-operator-history