# Relationship history for MSHA mine 4502981

Current hierarchy: **Don  Maples; Bob  Lloyd → Lloyd Logging Inc → Quarry Site Ad-50**

- 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:** Bob  Lloyd et al → Quarry Site Ad-50; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lloyd Logging Inc → Quarry Site Ad-50; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Lloyd et al → Lloyd Logging Inc; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Maples et al → Lloyd Logging Inc; 1983-01-01 to current/open; source msha-controller-operator-history