# Relationship history for MSHA mine 4609185

Current hierarchy: **CONSOL Energy Inc → CONSOL of Kentucky Inc → MT-13/500**

- 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 → MT-13/500; 1986-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CONSOL of Kentucky Inc → MT-13/500; 2006-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → CONSOL of Kentucky Inc; 2006-10-01 to current/open; source msha-controller-operator-history