# Relationship history for MSHA mine 4404461

Current hierarchy: **Jackson Jimmie → J & K 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:** Triple R Coal Company → No 2 Mine; 1976-05-24 to 1982-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Ira-Bill Et Al → No 2 Mine; 1976-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Ira-Bill Et Al → Triple R Coal Company; 1976-05-24 to 1982-01-31; source msha-controller-operator-history
- **operator_operates_mine:** B P & R Coal Inc → No 2 Mine; 1982-02-01 to 1984-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Richardson Dowell → No 2 Mine; 1982-02-01 to 1984-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Dowell → B P & R Coal Inc; 1982-02-01 to 1984-04-01; source msha-controller-operator-history
- **operator_operates_mine:** J & K Coal Company Inc → No 2 Mine; 1984-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jimmie → No 2 Mine; 1984-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jimmie → J & K Coal Company Inc; 1984-04-02 to current/open; source msha-controller-operator-history