# Relationship history for MSHA mine 2401856

Current hierarchy: **Hillard Larry → Larry Hillard → Erma**

- 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:** Larry Hillard → Erma; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hillard Larry → Erma; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hillard Larry → Larry Hillard; 1988-01-01 to current/open; source msha-controller-operator-history