# Relationship history for MSHA mine 1511392

Current hierarchy: **Coleman Roy D & James K--Thomas J Tabor → D K T Coal Company → No 6 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:** Kidd Roy → No 6 Mine; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Floyd Fuel Inc → No 6 Mine; 1978-06-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Kidd Roy → Floyd Fuel Inc; 1978-06-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Roy D & James K--Thomas J Tabor → No 6 Mine; 1978-09-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D K T Coal Company → No 6 Mine; 1979-06-01 to 1979-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Roy D & James K--Thomas J Tabor → D K T Coal Company; 1979-06-01 to 1979-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Ashley Lane Coal Company Inc → No 6 Mine; 1979-10-02 to 1980-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Gilbert A → No 6 Mine; 1979-10-02 to 1980-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Gilbert A → Ashley Lane Coal Company Inc; 1979-10-02 to 1980-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Subterranean Coal Enterprises Inc → No 6 Mine; 1980-03-25 to 1981-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Felon → No 6 Mine; 1980-03-25 to 1981-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Felon → Subterranean Coal Enterprises Inc; 1980-03-25 to 1981-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Crown Coal Company Inc → No 6 Mine; 1981-01-06 to 1981-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Arnold → No 6 Mine; 1981-01-06 to 1981-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Arnold → Crown Coal Company Inc; 1981-01-06 to 1981-10-14; source msha-controller-operator-history
- **operator_operates_mine:** D K T Coal Company → No 6 Mine; 1981-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Roy D & James K--Thomas J Tabor → D K T Coal Company; 1981-10-15 to current/open; source msha-controller-operator-history