# Relationship history for MSHA mine 0405266

Current hierarchy: **Casci Frank & Robert I Miller → Gum Boot Mine → Gumboot Mine**

- 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:** Gum Boot Mine → Gumboot Mine; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Casci Frank & Robert I Miller Et Al → Gumboot Mine; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casci Frank & Robert I Miller Et Al → Gum Boot Mine; 1995-06-01 to current/open; source msha-controller-operator-history