# Relationship history for MSHA mine 1516760

Current hierarchy: **Evans Davis → E & M Coals Inc → #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

- **operator_operates_mine:** Phillips Mining Company Inc → #2; 1989-10-01 to 1992-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Phillips Billy Joe → #2; 1989-10-01 to 1992-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Billy Joe → Phillips Mining Company Inc; 1989-10-01 to 1992-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Evans Davis → #2; 1990-05-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & M Coals Inc → #2; 1992-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Evans Davis → E & M Coals Inc; 1992-03-30 to current/open; source msha-controller-operator-history