# Relationship history for MSHA mine 0202456

Current hierarchy: **Lampman Emery E → C B H Limited Partnership → C B H Limited Partnership**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** C B H Limited Partnership → C B H Limited Partnership; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lampman Emery E Et Al → C B H Limited Partnership; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lampman Emery E Et Al → C B H Limited Partnership; 1988-08-01 to current/open; source msha-controller-operator-history