# Relationship history for MSHA mine 1202302

Current hierarchy: **Jackie S  Riddle → Jerry R Riddle Gravel Company Inc → RIDDLE SAND AND GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Jerry R Riddle Gravel Company Inc → RIDDLE SAND AND GRAVEL; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackie S  Riddle → RIDDLE SAND AND GRAVEL; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackie S  Riddle → Jerry R Riddle Gravel Company Inc; 2001-03-01 to current/open; source msha-controller-operator-history