# Relationship history for MSHA mine 1519761

Current hierarchy: **Laird T  Orr Jr. → Green Hill Mining, Inc. → GHM #10**

- 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 #10; 1978-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Hill Mining, Inc. → GHM #10; 2014-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laird T  Orr Jr. → Green Hill Mining, Inc.; 2014-08-29 to current/open; source msha-controller-operator-history