# Relationship history for MSHA mine 1511287

Current hierarchy: **Chaney John → Chaney Creek Coal Corp → Chaney #3**

- 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:** Donna Dee Coal Company Inc → Chaney #3; 1978-05-01 to 1982-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Blanton Jerry & Melvin → Chaney #3; 1978-05-01 to 1982-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Blanton Jerry & Melvin → Donna Dee Coal Company Inc; 1978-05-01 to 1982-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Chaney John → Chaney #3; 1979-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chaney Creek Coal Corp → Chaney #3; 1982-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chaney John → Chaney Creek Coal Corp; 1982-02-22 to current/open; source msha-controller-operator-history