# Relationship history for MSHA mine 4503416

Current hierarchy: **Leonard  Roosevelt → R & M Trucking → OLSON 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:** R & M Trucking → OLSON PIT; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leonard  Roosevelt et al → OLSON PIT; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leonard  Roosevelt et al → R & M Trucking; 1999-11-01 to current/open; source msha-controller-operator-history