# Relationship history for MSHA mine 4502795

Current hierarchy: **Paul J  Taylor; Jon M  Magnussen → Cadman Gravel Company → Stillwater 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:** Jon M  Magnussen  et al → Stillwater Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mt View Gravel → Stillwater Pit; 1980-04-01 to 1986-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Gooch Robert → Stillwater Pit; 1980-04-01 to 1986-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Gooch Robert → Mt View Gravel; 1980-04-01 to 1986-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Cadman Gravel Company → Stillwater Pit; 1986-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon M  Magnussen  et al → Cadman Gravel Company; 1986-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Taylor  et al → Cadman Gravel Company; 1986-06-06 to current/open; source msha-controller-operator-history