# Relationship history for MSHA mine 4605811

Current hierarchy: **Robert R  Bowling → Layland Coal Company → Kim Lynn 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Layland Coal Company → Kim Lynn Tipple; 1978-05-01 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Berwind Corporation → Kim Lynn Tipple; 1978-05-01 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Berwind Corporation → Layland Coal Company; 1978-05-01 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Bowling → Kim Lynn Tipple; 1980-07-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Layland Coal Company → Kim Lynn Tipple; 1982-01-01 to 1982-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Critchley Vernon → Kim Lynn Tipple; 1982-01-01 to 1982-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Critchley Vernon → Layland Coal Company; 1982-01-01 to 1982-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Pocahontas Coal Sales Inc → Kim Lynn Tipple; 1982-08-27 to 1987-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Bowling → Pocahontas Coal Sales Inc; 1982-08-27 to 1987-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Swartz James C Jr → Kim Lynn Tipple; 1987-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Processing Resources Inc → Kim Lynn Tipple; 1987-12-09 to 1988-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Burchett Keith → Kim Lynn Tipple; 1987-12-09 to 1988-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Burchett Keith → Coal Processing Resources Inc; 1987-12-09 to 1988-05-09; source msha-controller-operator-history
- **operator_operates_mine:** D & A Resources Inc → Kim Lynn Tipple; 1988-05-10 to 1990-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Swartz James C Jr → D & A Resources Inc; 1988-05-10 to 1990-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Pocahontas Coal Sales Inc → Kim Lynn Tipple; 1990-10-04 to 1992-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Bowling → Pocahontas Coal Sales Inc; 1990-10-04 to 1992-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Brickey Sale Corp → Kim Lynn Tipple; 1992-04-22 to 1993-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Goff Sammy → Kim Lynn Tipple; 1992-04-22 to 1993-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Goff Sammy → Brickey Sale Corp; 1992-04-22 to 1993-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Layland Coal Company → Kim Lynn Tipple; 1993-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Bowling → Kim Lynn Tipple; 1993-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Bowling → Layland Coal Company; 1993-05-19 to current/open; source msha-controller-operator-history