# Relationship history for MSHA mine 1519903

Current hierarchy: **Rapid NRG USA, Inc → Rapid FM Coal, LLC → TC-2**

- 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:** Rapid FM Coal, LLC → TC-2; 2021-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rapid NRG USA, Inc → TC-2; 2021-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rapid NRG USA, Inc → Rapid FM Coal, LLC; 2021-06-29 to current/open; source msha-controller-operator-history