# Relationship history for MSHA mine 3502936

Current hierarchy: **Haener Arley → H & H Contractors Inc → Oregon State Pit 32-16-5**

- 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:** Haener Arley → Oregon State Pit 32-16-5; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H & H Contractors Inc → Oregon State Pit 32-16-5; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haener Arley → H & H Contractors Inc; 1979-01-01 to current/open; source msha-controller-operator-history