# Relationship history for MSHA mine 1503985

Current hierarchy: **Haydon Holdings LLC → Nally & Haydon Surfacing, LLC → NALLY & GIBSON SPRINGFIELD**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

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