# Relationship history for MSHA mine 1500073

Current hierarchy: **Haydon Holdings LLC → Haydon Materials, LLC → Haydon Materials, LLC**

- 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:** Nally & Gibson Quarries, Inc → Haydon Materials, LLC; 1950-01-01 to 2007-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Mark F  Nally → Haydon Materials, LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark F  Nally → Nally & Gibson Quarries, Inc; 1950-01-01 to 2007-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Haydon Holdings LLC → Haydon Materials, LLC; 1990-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Haydon Materials, LLC → Haydon Materials, LLC; 2007-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haydon Holdings LLC → Haydon Materials, LLC; 2007-05-04 to current/open; source msha-controller-operator-history