# Relationship history for MSHA mine 3503053

Current hierarchy: **Louis A  Fowler → John L Fowler Trucking → Fowler's 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

- **operator_operates_mine:** John L Fowler Trucking → Fowler's Pit; 1981-03-01 to 2009-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Ola V  Fowler → Fowler's Pit; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ola V  Fowler → John L Fowler Trucking; 1981-03-01 to 2009-10-14; source msha-controller-operator-history
- **operator_operates_mine:** John L Fowler Trucking → Fowler's Pit; 2009-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Louis A  Fowler → Fowler's Pit; 2009-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis A  Fowler → John L Fowler Trucking; 2009-10-15 to current/open; source msha-controller-operator-history