# Relationship history for MSHA mine 1500113

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

- 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:** Ward & Montgomery → LEBANON QUARRY; 1950-01-01 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Simeon  Montgomery → LEBANON QUARRY; 1950-01-01 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Simeon  Montgomery → Ward & Montgomery; 1950-01-01 to 1990-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Haydon Materials, LLC → LEBANON QUARRY; 1990-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Haydon Holdings LLC → LEBANON QUARRY; 1990-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haydon Holdings LLC → Haydon Materials, LLC; 1990-06-01 to current/open; source msha-controller-operator-history