# Relationship history for MSHA mine 0102315

Current hierarchy: **Lemmon Glyen → Alabama Georgia Mining Company Inc → Stimpson**

- 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:** R & R Coal Company → Stimpson; 1981-05-01 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Charles Bailey & Charles Bailey Ii → Stimpson; 1981-05-01 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Charles Bailey & Charles Bailey Ii → R & R Coal Company; 1981-05-01 to 1982-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Georgia Mining Company Inc → Stimpson; 1982-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lemmon Glyen → Stimpson; 1982-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lemmon Glyen → Alabama Georgia Mining Company Inc; 1982-04-07 to current/open; source msha-controller-operator-history