# Relationship history for MSHA mine 3501296

Current hierarchy: **Pope Peter → Pope & Talbot Inc → Emigrant Butte Quarry**

- 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:** U S Forest Service → Emigrant Butte Quarry; 1950-01-01 to 1981-01-20; source msha-controller-operator-history
- **controller_controls_mine:** United States Government → Emigrant Butte Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** United States Government → U S Forest Service; 1950-01-01 to 1981-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Pope Peter Et Al → Emigrant Butte Quarry; 1981-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pope & Talbot Inc → Emigrant Butte Quarry; 1981-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pope Peter Et Al → Pope & Talbot Inc; 1981-01-21 to current/open; source msha-controller-operator-history