# Relationship history for MSHA mine 1518591

Current hierarchy: **CONSOL Energy Inc → Consol of Kentucky, Inc. → Salyers Branch H4**

- 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:** CONSOL Energy Inc → Salyers Branch H4; 1986-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Consol of Kentucky, Inc. → Salyers Branch H4; 2002-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consol of Kentucky, Inc.; 2002-11-25 to current/open; source msha-controller-operator-history