# Relationship history for MSHA mine 4003253

Current hierarchy: **Laird T  Orr Jr. → Green Hill Mining Inc → GHM #35**

- 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:** Laird T  Orr Jr. → GHM #35; 1978-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Hill Mining Inc → GHM #35; 2005-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laird T  Orr Jr. → Green Hill Mining Inc; 2005-03-14 to current/open; source msha-controller-operator-history