# Relationship history for MSHA mine 3304192

Current hierarchy: **Oster Enterprises Inc → Oster Sand & Gravel Inc → MUDBRO0K PLANT**

- 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:** Oster Enterprises Inc → MUDBRO0K PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dorothea M  Radabaugh et al → MUDBRO0K PLANT; 1950-01-01 to 2015-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Rupp Construction Inc → MUDBRO0K PLANT; 1990-04-01 to 1999-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Dorothea M  Radabaugh et al → Rupp Construction Inc; 1990-04-01 to 1999-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Gary D  Radabaugh et al → Rupp Construction Inc; 1990-04-01 to 1999-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Oster Sand & Gravel Inc → MUDBRO0K PLANT; 1999-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oster Enterprises Inc → Oster Sand & Gravel Inc; 1999-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lindsey M  Schmitt → MUDBRO0K PLANT; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lindsey M  Schmitt → Rupp Construction Inc; 2015-04-01 to 1999-06-07; source msha-controller-operator-history