# Relationship history for MSHA mine 1103001

Current hierarchy: **David K  Stark → Stark Materials Company Inc → Gesell Gravel Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** David K  Stark → Gesell Gravel Pit; 1989-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stark Materials Company Inc → Gesell Gravel Pit; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David K  Stark → Stark Materials Company Inc; 1997-04-01 to current/open; source msha-controller-operator-history