# Relationship history for MSHA mine 4105500

Current hierarchy: **JH Strain & Sons, Inc; Holli  Sims; Phil  Lanman; Mark  Sims → Lanman Lueders Quarry → Lanman Lueders 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:** Lanman Lueders Quarry → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holli  Sims et al → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holli  Sims et al → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** JH Strain & Sons, Inc et al → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phil  Lanman et al → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Sims et al → Lanman Lueders Quarry; 2020-02-28 to current/open; source msha-controller-operator-history