# Relationship history for MSHA mine 4105369

Current hierarchy: **WildFire Energy LLC → Burleson Sand → Burleson Sand**

- 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:** Burleson Sand LLC → Burleson Sand; 2018-07-12 to 2023-03-19; source msha-controller-operator-history
- **controller_controls_mine:** WildHorse Resource Development Company → Burleson Sand; 2018-07-12 to 2019-01-31; source msha-controller-operator-history
- **controller_controls_operator:** WildHorse Resource Development Company → Burleson Sand LLC; 2018-07-12 to 2019-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Expand Energy Corporation → Burleson Sand; 2019-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Expand Energy Corporation → Burleson Sand LLC; 2019-02-01 to 2023-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Burleson Sand → Burleson Sand; 2023-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** WildFire Energy LLC → Burleson Sand; 2023-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** WildFire Energy LLC → Burleson Sand; 2023-03-20 to current/open; source msha-controller-operator-history