# Relationship history for MSHA mine 3605537

Current hierarchy: **Stiffler Albert F & Albert L → Eastern States Mining Company → Barger-Miller-Pritts**

- 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:** Eidemiller Wilmer P → Barger-Miller-Pritts; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Adam Eidemiller Inc → Barger-Miller-Pritts; 1975-04-15 to 1980-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Eidemiller Wilmer P → Adam Eidemiller Inc; 1975-04-15 to 1980-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Penn Coal Company → Barger-Miller-Pritts; 1980-10-06 to 1981-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Penn Erection & Rigging → Barger-Miller-Pritts; 1980-10-06 to 1981-10-07; source msha-controller-operator-history
- **controller_controls_operator:** Penn Erection & Rigging → Penn Coal Company; 1980-10-06 to 1981-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Stiffler Albert F & Albert L → Barger-Miller-Pritts; 1981-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern States Mining Company → Barger-Miller-Pritts; 1981-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stiffler Albert F & Albert L → Eastern States Mining Company; 1981-10-08 to current/open; source msha-controller-operator-history