# Relationship history for MSHA mine 4606993

Current hierarchy: **Henry Paul  Kizer → Hansford Smokeless Collieries Inc → No 2 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:** Hansford Smokeless Collieries Inc → No 2 Mine; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → No 2 Mine; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → Hansford Smokeless Collieries Inc; 1985-09-01 to current/open; source msha-controller-operator-history