# Relationship history for MSHA mine 4604525

Current hierarchy: **Richard H  Abraham → Laurel Creek Mining Company Inc → #1**

- 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

- **operator_operates_mine:** Laurel Creek Mining Company Inc → #1; 1975-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Abraham et al → #1; 1975-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Abraham et al → Laurel Creek Mining Company Inc; 1975-05-27 to current/open; source msha-controller-operator-history