# Relationship history for MSHA mine 3610046

Current hierarchy: **Snyder Associated Companies Inc → Allegheny Mineral Corp → Portable Plant 02 (Eagle)**

- 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:** Snyder Associated Companies Inc → Portable Plant 02 (Eagle); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Aloe et al → Portable Plant 02 (Eagle); 1989-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quality Aggregates → Portable Plant 02 (Eagle); 2013-01-21 to 2013-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Aloe et al → Quality Aggregates; 2013-01-21 to 2013-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Allegheny Mineral Corp → Portable Plant 02 (Eagle); 2013-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Snyder Associated Companies Inc → Allegheny Mineral Corp; 2013-06-25 to current/open; source msha-controller-operator-history