# Relationship history for MSHA mine 0102133

Current hierarchy: **John R (Reed)  Marine Jr → Al-Tenn Coal Company Inc → Gulf States Pit**

- 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:** Joe E  Powell → Gulf States Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pickens Sand & Gravel Company → Gulf States Pit; 1979-01-01 to 1982-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Joe E  Powell → Pickens Sand & Gravel Company; 1979-01-01 to 1982-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Al-Tenn Coal Company Inc → Gulf States Pit; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John R (Reed)  Marine Jr → Gulf States Pit; 1982-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R (Reed)  Marine Jr → Al-Tenn Coal Company Inc; 1982-05-01 to current/open; source msha-controller-operator-history