# Relationship history for MSHA mine 1517204

Current hierarchy: **Cliff  Bartley → Cliffco Enterprise Inc → No 2**

- 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:** Adkins Claymon & Abram → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cliff  Bartley → No 2; 1991-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Claymon & Abram Adkins Coal Company → No 2; 1992-02-01 to 1992-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Claymon & Abram → Claymon & Abram Adkins Coal Company; 1992-02-01 to 1992-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Cliffco Enterprise Inc → No 2; 1992-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cliff  Bartley → Cliffco Enterprise Inc; 1992-09-28 to current/open; source msha-controller-operator-history