# Relationship history for MSHA mine 3502899

Current hierarchy: **L/C Trucking → L/C Trucking → Indian Creek 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

- **controller_controls_mine:** Angell Bob → Indian Creek Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bob Angell Inc → Indian Creek Pit; 1979-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Angell Bob → Bob Angell Inc; 1979-01-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** L/C Trucking → Indian Creek Pit; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** L/C Trucking → Indian Creek Pit; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L/C Trucking → L/C Trucking; 1979-11-01 to current/open; source msha-controller-operator-history