# Relationship history for MSHA mine 1001341

Current hierarchy: **Bonneville County-ID → Bonneville County Road & Bridge Department → Tyler 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:** Western Construction Inc → Tyler Pit; 1950-01-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Heaton → Tyler Pit; 1950-01-01 to 2024-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Heaton → Western Construction Inc; 1950-01-01 to 1980-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Bonneville County Road & Bridge Department → Tyler Pit; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bonneville County-ID → Tyler Pit; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bonneville County-ID → Bonneville County Road & Bridge Department; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven C  Heaton → Tyler Pit; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven C  Heaton → Western Construction Inc; 2024-09-10 to 1980-04-30; source msha-controller-operator-history