# Relationship history for MSHA mine 3503004

Current hierarchy: **Jerry L  Storedahl → Les Darr Trucking Company → Deer Island 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:** Tuss Tom → Deer Island Pit; 1979-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tuss Crushing Company → Deer Island Pit; 1980-04-01 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Tuss Tom → Tuss Crushing Company; 1980-04-01 to 1981-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Les Darr Trucking Company → Deer Island Pit; 1981-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry L  Storedahl → Deer Island Pit; 1981-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry L  Storedahl → Les Darr Trucking Company; 1981-06-24 to current/open; source msha-controller-operator-history