# Relationship history for MSHA mine 4801849

Current hierarchy: **Staci  Leonardo; Scott  Neal → Wyoming Construction Materials, LLC → WCM Mobile Trommel**

- 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

- **controller_controls_mine:** Scott  Neal et al → WCM Mobile Trommel; 2019-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Construction Materials, LLC → WCM Mobile Trommel; 2023-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Neal et al → Wyoming Construction Materials, LLC; 2023-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Staci  Leonardo et al → Wyoming Construction Materials, LLC; 2023-08-22 to current/open; source msha-controller-operator-history