# Relationship history for MSHA mine 0504529

Current hierarchy: **Chris  Pyles; Sue  Pyles → Gillette Sand & Gravel Inc → Gillette Sand & Gravel**

- 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

- **operator_operates_mine:** Gillette Sand & Gravel Inc → Gillette Sand & Gravel; 1993-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark V  Yevoli → Gillette Sand & Gravel; 1993-08-01 to 2005-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Mark V  Yevoli → Gillette Sand & Gravel Inc; 1993-08-01 to 2005-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Sue  Pyles et al → Gillette Sand & Gravel; 2005-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sue  Pyles et al → Gillette Sand & Gravel Inc; 2005-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Pyles et al → Gillette Sand & Gravel Inc; 2005-05-18 to current/open; source msha-controller-operator-history