# Relationship history for MSHA mine 3901569

Current hierarchy: **Butch  Oseby → Dakota Rock & Gravel, Inc. → Reynolds-Gustafson 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:** Dakota Rock & Gravel, Inc. → Reynolds-Gustafson Pit; 2011-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Butch  Oseby → Reynolds-Gustafson Pit; 2011-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Butch  Oseby → Dakota Rock & Gravel, Inc.; 2011-04-18 to current/open; source msha-controller-operator-history