# Relationship history for MSHA mine 4604654

Current hierarchy: **Hoffman R D → S & K Corp → Surface Mine No 2**

- 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:** Badger Distributing Inc → Surface Mine No 2; 1950-01-01 to 1980-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clure Edward D → Surface Mine No 2; 1950-01-01 to 1980-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clure Edward D → Badger Distributing Inc; 1950-01-01 to 1980-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Adkins James H → Surface Mine No 2; 1975-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hoffman R D → Surface Mine No 2; 1980-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A M Y Coal Inc → Surface Mine No 2; 1980-05-25 to 1980-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Adkins James H → A M Y Coal Inc; 1980-05-25 to 1980-10-19; source msha-controller-operator-history
- **operator_operates_mine:** S & K Corp → Surface Mine No 2; 1980-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoffman R D → S & K Corp; 1980-10-20 to current/open; source msha-controller-operator-history