# Relationship history for MSHA mine 4607634

Current hierarchy: **Triplett Sennett C → Sennett Triplett Coal Inc → No 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:** Sennett Triplett Coal Inc → No 1; 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Triplett Sennett C → No 1; 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Triplett Sennett C → Sennett Triplett Coal Inc; 1988-12-01 to current/open; source msha-controller-operator-history