# Relationship history for MSHA mine 1511411

Current hierarchy: **Lemar Reece → Shauna-Darease Coal Inc → Kellioka No 4 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Dowell Harold → Kellioka No 4 Mine; 1977-08-18 to 1984-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Dowell Mining Company Inc → Kellioka No 4 Mine; 1978-08-01 to 1984-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Dowell Harold → Dowell Mining Company Inc; 1978-08-01 to 1984-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Saylor Delbert & Darlene Roberts → Kellioka No 4 Mine; 1982-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dan Del Coals Inc → Kellioka No 4 Mine; 1984-09-24 to 1985-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Saylor Delbert & Darlene Roberts → Dan Del Coals Inc; 1984-09-24 to 1985-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Lemar Reece → Kellioka No 4 Mine; 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shauna-Darease Coal Inc → Kellioka No 4 Mine; 1985-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lemar Reece → Shauna-Darease Coal Inc; 1985-05-10 to current/open; source msha-controller-operator-history