# Relationship history for MSHA mine 2103630

Current hierarchy: **Peter  Olson; Mike  Hansen; Matt  Torgerson → North 40 Resources → Osceola 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:** Rybak Aggregate, LLC. → Osceola Pit; 2008-05-19 to 2022-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Dave J  Rybak → Osceola Pit; 2008-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave J  Rybak → Rybak Aggregate, LLC.; 2008-05-19 to 2022-08-15; source msha-controller-operator-history
- **operator_operates_mine:** North 40 Resources → Osceola Pit; 2022-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter  Olson et al → Osceola Pit; 2022-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Olson et al → North 40 Resources; 2022-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Torgerson et al → North 40 Resources; 2022-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Hansen et al → North 40 Resources; 2022-08-16 to current/open; source msha-controller-operator-history