# Relationship history for MSHA mine 4100009

Current hierarchy: **Jack A Carson → Cactus Canyon Quarries Inc → Fairland Plant & Qys**

- 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

- **operator_operates_mine:** Cactus Canyon Quarries Inc → Fairland Plant & Qys; 1950-01-01 to 1983-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Don  Hunt → Fairland Plant & Qys; 1950-01-01 to 2013-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Don  Hunt → Cactus Canyon Quarries Inc; 1950-01-01 to 1983-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Cactus Canyon Quarries Of Texas Inc → Fairland Plant & Qys; 1983-10-01 to 2013-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jack A Carson → Fairland Plant & Qys; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack A Carson → Cactus Canyon Quarries Of Texas Inc; 1983-10-01 to 2013-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Cactus Canyon Quarries Inc → Fairland Plant & Qys; 2013-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Hunt → Cactus Canyon Quarries Inc; 2013-05-01 to 2013-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jack A Carson → Fairland Plant & Qys; 2013-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack A Carson → Cactus Canyon Quarries Inc; 2013-05-01 to 1983-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Jack A Carson → Cactus Canyon Quarries Inc; 2013-05-01 to current/open; source msha-controller-operator-history