# Relationship history for MSHA mine 1519797

Current hierarchy: **Shannon  Burnett; Charlie  Slykhuis → SF Contracting LLC. → Fies Slurry Recovery**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Shannon  Burnett et al → Fies Slurry Recovery; 2014-09-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G & G Mines LLC → Fies Slurry Recovery; 2016-08-03 to 2018-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Gandolfo → Fies Slurry Recovery; 2016-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Gandolfo → G & G Mines LLC; 2016-08-03 to 2018-03-08; source msha-controller-operator-history
- **operator_operates_mine:** SF Contracting LLC. → Fies Slurry Recovery; 2018-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shannon  Burnett et al → SF Contracting LLC.; 2018-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charlie  Slykhuis et al → SF Contracting LLC.; 2018-03-09 to current/open; source msha-controller-operator-history