# Relationship history for MSHA mine 1517861

Current hierarchy: **Yvonne  Yonts → Straight Fork Mining Inc → Jacks Creek**

- 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:** Larry  Yonts et al → Jacks Creek; 1988-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Daves Branch Inc → Jacks Creek; 1996-10-01 to 1997-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Yonts et al → Daves Branch Inc; 1996-10-01 to 1997-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Slone et al → Daves Branch Inc; 1996-10-01 to 1997-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Straight Fork Mining Inc → Jacks Creek; 1997-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yvonne  Yonts et al → Jacks Creek; 1997-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne  Yonts et al → Straight Fork Mining Inc; 1997-01-30 to current/open; source msha-controller-operator-history