# Relationship history for MSHA mine 2402432

Current hierarchy: **Robert A  Hadley → Hadley Stone Supply LLC → Hot Springs Quarry**

- 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:** Zachery David  Anderson → Hot Springs Quarry; 2004-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anderson Masonry, Inc. → Hot Springs Quarry; 2006-01-01 to 2018-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Zachery David  Anderson → Anderson Masonry, Inc.; 2006-01-01 to 2018-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Robert A  Hadley → Hot Springs Quarry; 2017-12-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hadley Stone Supply LLC → Hot Springs Quarry; 2018-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Hadley → Hadley Stone Supply LLC; 2018-06-11 to current/open; source msha-controller-operator-history