# Relationship history for MSHA mine 4003191

Current hierarchy: **Stuart T  Hood; Mark  Sumner → WEST FRK 4, LLC → WEST FRK 4**

- 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:** WEST FRK 4, LLC → WEST FRK 4; 2002-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stuart T  Hood et al → WEST FRK 4; 2002-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stuart T  Hood et al → WEST FRK 4, LLC; 2002-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Sumner et al → WEST FRK 4, LLC; 2002-04-25 to current/open; source msha-controller-operator-history