# Relationship history for MSHA mine 4608039

Current hierarchy: **Henry Paul  Kizer → Robinson Mining Corp → No 1 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:** Robinson Mining Corp → No 1 Mine; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → No 1 Mine; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → Robinson Mining Corp; 1991-04-01 to current/open; source msha-controller-operator-history