# Relationship history for MSHA mine 4103348

Current hierarchy: **Summit Materials LLC → Troy Vines Inc → Vines 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:** Troy Vines Inc → Vines Sand & Gravel; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale  Vines et al → Vines Sand & Gravel; 1985-11-01 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Vines et al → Troy Vines Inc; 1985-11-01 to 2014-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Vines Sand & Gravel; 2014-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Troy Vines Inc; 2014-07-08 to current/open; source msha-controller-operator-history