# Relationship history for MSHA mine 0503811

Current hierarchy: **Weinland Construction Inc → R & R Gravel Inc → R&R 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:** R & R Gravel Inc → R&R GRAVEL; 1982-09-01 to 1986-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Louis R  Asnicar → R&R GRAVEL; 1982-09-01 to 1986-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Louis R  Asnicar → R & R Gravel Inc; 1982-09-01 to 1986-07-09; source msha-controller-operator-history
- **operator_operates_mine:** R & R Gravel Inc → R&R GRAVEL; 1986-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weinland Construction Inc Et Al → R&R GRAVEL; 1986-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weinland Construction Inc Et Al → R & R Gravel Inc; 1986-07-10 to current/open; source msha-controller-operator-history