# Relationship history for MSHA mine 1900307

Current hierarchy: **E H Perkins Construction Inc → Kane-Perkins Company Inc → HUDSON PLANT**

- 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:** Kane Corp → HUDSON PLANT; 1950-01-01 to 1986-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Roger K  Kane → HUDSON PLANT; 1950-01-01 to 1986-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Roger K  Kane → Kane Corp; 1950-01-01 to 1986-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Kane-Perkins Company Inc → HUDSON PLANT; 1986-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** E H Perkins Construction Inc → HUDSON PLANT; 1986-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E H Perkins Construction Inc → Kane-Perkins Company Inc; 1986-07-25 to current/open; source msha-controller-operator-history