# Relationship history for MSHA mine 4608340

Current hierarchy: **CONSOL Energy Inc → Fola Coal Company Llc → Surface #1 (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:** Fola Coal Company Llc → Surface #1 (1); 1993-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amvest Corporation → Surface #1 (1); 1993-08-01 to 2007-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Amvest Corporation → Fola Coal Company Llc; 1993-08-01 to 2007-07-31; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Surface #1 (1); 2007-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Fola Coal Company Llc; 2007-08-01 to current/open; source msha-controller-operator-history