# Relationship history for MSHA mine 0202476

Current hierarchy: **Laurence  Harvey → Abe'S Materials Inc → Wilson'S 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:** Laurence  Harvey → Wilson'S Pit; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Abe'S Materials Inc → Wilson'S Pit; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laurence  Harvey → Abe'S Materials Inc; 1989-01-01 to current/open; source msha-controller-operator-history