# Relationship history for MSHA mine 1514228

Current hierarchy: **Pelphrey Paul A-Pres → Block Coal Inc → Block Coal No 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Pelphrey Paul A-Pres → Block Coal No 1 Surface Mine; 1983-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Block Coal Inc → Block Coal No 1 Surface Mine; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pelphrey Paul A-Pres → Block Coal Inc; 1983-09-01 to current/open; source msha-controller-operator-history