# Relationship history for MSHA mine 1001602

Current hierarchy: **Horn Robert E → Bob Horn Mining → Taylor Bar**

- 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

- **controller_controls_mine:** Horn Robert E Et Al → Taylor Bar; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bob Horn Mining → Taylor Bar; 1982-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horn Robert E Et Al → Bob Horn Mining; 1982-11-01 to current/open; source msha-controller-operator-history