# Relationship history for MSHA mine 3004056

Current hierarchy: **Glendon T  Rafferty; Jason  Rafferty → Rafferty Sand & Gravel LLC → Keestrack R6**

- 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:** Glen R  Rafferty → Keestrack R6; 2005-05-17 to 2018-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Jason R Rafferty et al → Keestrack R6; 2018-11-16 to 2020-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Rafferty Sand & Gravel LLC → Keestrack R6; 2020-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glen R  Rafferty → Rafferty Sand & Gravel LLC; 2020-06-05 to 2018-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Jason R Rafferty et al → Rafferty Sand & Gravel LLC; 2020-06-05 to 2020-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Glendon T Rafferty et al → Rafferty Sand & Gravel LLC; 2020-06-05 to 2020-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Joyce  Rafferty et al → Rafferty Sand & Gravel LLC; 2020-06-05 to 2020-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Rafferty et al → Keestrack R6; 2020-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Rafferty et al → Rafferty Sand & Gravel LLC; 2020-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glendon T  Rafferty et al → Rafferty Sand & Gravel LLC; 2020-09-14 to current/open; source msha-controller-operator-history