# Relationship history for MSHA mine 1517607

Current hierarchy: **Jackie (Mitch)  Fannin; Jack  Stump → Tricoal Inc → Tricoal Inc #1**

- 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:** Stanley R  Ditty → Tricoal Inc #1; 1989-10-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Del Rio Inc → Tricoal Inc #1; 1994-09-01 to 1999-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R  Ditty → Del Rio Inc; 1994-09-01 to 1999-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Tricoal Inc → Tricoal Inc #1; 1999-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackie (Mitch)  Fannin Et Al → Tricoal Inc #1; 1999-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackie (Mitch)  Fannin Et Al → Tricoal Inc; 1999-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Stump Et Al → Tricoal Inc; 1999-05-18 to current/open; source msha-controller-operator-history