# Relationship history for MSHA mine 1506386

Current hierarchy: **Adams Andy → Ky Resources Coal & Dock Inc → River Coal & Dock**

- 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:** River Coal Company Inc → River Coal & Dock; 1950-01-01 to 1980-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Aminex Resources Corp → River Coal & Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aminex Resources Corp → River Coal Company Inc; 1950-01-01 to 1980-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Edward L Clemons Estate → River Coal & Dock; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kem Coal Company Inc & Kresco Inc → River Coal & Dock; 1980-02-22 to 1981-06-24; source msha-controller-operator-history
- **operator_operates_mine:** K & K Enterprises → River Coal & Dock; 1980-08-20 to 1980-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Kem Coal Company Inc & Kresco Inc → K & K Enterprises; 1980-08-20 to 1980-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Kem Coal Company Inc → River Coal & Dock; 1980-09-12 to 1982-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate → Kem Coal Company Inc; 1980-09-12 to 1982-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → River Coal & Dock; 1981-06-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kem Coal Inc → River Coal & Dock; 1982-05-06 to 1987-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Kem Coal Inc; 1982-05-06 to 1987-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Ky Resources Coal & Dock Inc → River Coal & Dock; 1987-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Andy → River Coal & Dock; 1987-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Andy → Ky Resources Coal & Dock Inc; 1987-10-15 to current/open; source msha-controller-operator-history