# Relationship history for MSHA mine 3303661

Current hierarchy: **Ronald E  Watson → Watson Gravel Inc → New Paris 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ronald E  Watson → New Paris Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Paris Materials Company Inc → New Paris Pit; 1950-01-01 to 1979-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Hoffman James → New Paris Pit; 1950-01-01 to 1979-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Hoffman James → New Paris Materials Company Inc; 1950-01-01 to 1979-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Watson Gravel Inc → New Paris Pit; 1979-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Watson → Watson Gravel Inc; 1979-06-20 to current/open; source msha-controller-operator-history