# Relationship history for MSHA mine 1517457

Current hierarchy: **Wesley  Childers → Bevins & Bolden Coal Company Inc → No 2 Mine**

- 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:** Dennis Allen  Ramey → No 2 Mine; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wesley  Childers → No 2 Mine; 1993-07-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sweatbee Coal Company → No 2 Mine; 1993-10-01 to 1994-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Dennis Allen  Ramey → Sweatbee Coal Company; 1993-10-01 to 1994-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Bevins & Bolden Coal Company Inc → No 2 Mine; 1994-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wesley  Childers → Bevins & Bolden Coal Company Inc; 1994-03-08 to current/open; source msha-controller-operator-history