# Relationship history for MSHA mine 4105756

Current hierarchy: **Brett Sven Adams → Adams Materials and Excavation LLC → Ronald Reagan 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

- **operator_operates_mine:** Adams Materials and Excavation LLC → Ronald Reagan Pit; 2024-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brett Sven Adams → Ronald Reagan Pit; 2024-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett Sven Adams → Adams Materials and Excavation LLC; 2024-05-08 to current/open; source msha-controller-operator-history