# Relationship history for MSHA mine 2602643

Current hierarchy: **Megan  Weaver; Patrick  Schommer → Nevada Building Supply LLC → Hwy 95 Pit**

- 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:** Norman D  Sweeney → Hwy 95 Pit; 2000-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Norman D Sweeney Construction → Hwy 95 Pit; 2008-04-02 to 2023-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Norman D  Sweeney → Norman D Sweeney Construction; 2008-04-02 to 2023-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Schommer et al → Hwy 95 Pit; 2023-05-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nevada Building Supply LLC → Hwy 95 Pit; 2023-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Schommer et al → Nevada Building Supply LLC; 2023-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Megan  Weaver et al → Nevada Building Supply LLC; 2023-06-05 to current/open; source msha-controller-operator-history