# Relationship history for MSHA mine 1506256

Current hierarchy: **Pelphrey Paul A-Pres → Diamond P Coal Company Inc → Eagle Job #1 Surface Mine**

- 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

- **operator_operates_mine:** Goeglein Coal Company → Eagle Job #1 Surface Mine; 1950-01-01 to 1978-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Goeglein Albert-Charles & Avery → Eagle Job #1 Surface Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goeglein Albert-Charles & Avery → Goeglein Coal Company; 1950-01-01 to 1978-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Diamond P Coal Company Inc → Eagle Job #1 Surface Mine; 1978-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pelphrey Paul A-Pres → Eagle Job #1 Surface Mine; 1978-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pelphrey Paul A-Pres → Diamond P Coal Company Inc; 1978-05-09 to current/open; source msha-controller-operator-history