# Relationship history for MSHA mine 4607600

Current hierarchy: **Mack Guy A → Summersville Five-Block Coal Corp → Mine #102**

- 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:** Tim Doug  Johnson → Mine #102; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chloe Ridge Coal Company Inc → Mine #102; 1988-10-01 to 1991-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Tim Doug  Johnson → Chloe Ridge Coal Company Inc; 1988-10-01 to 1991-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Summersville Five-Block Coal Corp → Mine #102; 1991-10-15 to 1993-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Danette B → Mine #102; 1991-10-15 to 1993-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Danette B → Summersville Five-Block Coal Corp; 1991-10-15 to 1993-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Summersville Five Block Coal Corp → Mine #102; 1993-01-18 to 1993-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Trujillo Pat → Mine #102; 1993-01-18 to 1994-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Trujillo Pat → Summersville Five Block Coal Corp; 1993-01-18 to 1993-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Summersville Five-Block Coal Corp → Mine #102; 1993-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mack Guy A → Mine #102; 1993-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mack Guy A → Summersville Five-Block Coal Corp; 1993-11-19 to current/open; source msha-controller-operator-history