# Relationship history for MSHA mine 4604993

Current hierarchy: **Pritchard Randall → Allied Coal Inc → East Lynn 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:** Pritchard Randall → East Lynn Mine; 1975-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Allied Coal Inc → East Lynn Mine; 1975-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pritchard Randall → Allied Coal Inc; 1975-10-20 to current/open; source msha-controller-operator-history