# Relationship history for MSHA mine 0202360

Current hierarchy: **C J Langenfelder & Son Inc → Fnf Mining → Eq#71-01 Lj 1213 Ptbl Crshg/Scrng Pl S/N**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Fnf Mining → Eq#71-01 Lj 1213 Ptbl Crshg/Scrng Pl S/N; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** C J Langenfelder & Son Inc → Eq#71-01 Lj 1213 Ptbl Crshg/Scrng Pl S/N; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C J Langenfelder & Son Inc → Fnf Mining; 1987-03-01 to current/open; source msha-controller-operator-history