# Relationship history for MSHA mine 3200635

Current hierarchy: **Lund Roger & James Kagerland → Crosby Redi-Mix → Kettle Lake 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Crosby Redi-Mix → Kettle Lake Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lund Roger & James Kagerland → Kettle Lake Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lund Roger & James Kagerland → Crosby Redi-Mix; 1978-03-09 to current/open; source msha-controller-operator-history