# Relationship history for MSHA mine 4602156

Current hierarchy: **Henry Paul  Kizer → Maben Energy Corp → Maben 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:** Westmoreland Coal Company → Maben No 1 Mine; 1950-01-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Maben No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1950-01-01 to 1977-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Maben Energy Corp → Maben No 1 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → Maben No 1 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → Maben Energy Corp; 1977-10-01 to current/open; source msha-controller-operator-history