# Relationship history for MSHA mine 4401391

Current hierarchy: **Dingus Lowell → J & D Coal Company 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:** Kilgore Brothers Coal Company Inc → No 2 Mine; 1950-01-01 to 1974-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Kilgore Brothers Coal Company Inc → No 2 Mine; 1950-01-01 to 1974-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Kilgore Brothers Coal Company Inc → Kilgore Brothers Coal Company Inc; 1950-01-01 to 1974-06-01; source msha-controller-operator-history
- **operator_operates_mine:** B & K Coal Company Inc → No 2 Mine; 1974-06-02 to 1975-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Dingus Lowell Et Al → No 2 Mine; 1974-06-02 to 1975-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Dingus Lowell Et Al → B & K Coal Company Inc; 1974-06-02 to 1975-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Dingus Lowell Et Al → No 2 Mine; 1974-07-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & D Coal Company Inc → No 2 Mine; 1975-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dingus Lowell Et Al → J & D Coal Company Inc; 1975-05-31 to current/open; source msha-controller-operator-history