# Relationship history for MSHA mine 4201259

Current hierarchy: **Harold  Roberts → Energy Fuels Nuclear Inc → Lucky Strike 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

- **controller_controls_mine:** Harold  Roberts → Lucky Strike Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hannert Mining Inc → Lucky Strike Mine; 1950-01-01 to 1980-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Hannert Ronald → Lucky Strike Mine; 1950-01-01 to 1980-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Hannert Ronald → Hannert Mining Inc; 1950-01-01 to 1980-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Nuclear Inc → Lucky Strike Mine; 1980-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Roberts → Energy Fuels Nuclear Inc; 1980-02-05 to current/open; source msha-controller-operator-history