# Relationship history for MSHA mine 4201676

Current hierarchy: **Roedel Mike & Billy → Roedel Mining → Sinbad Mine**

- 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:** Newman Eric → Sinbad Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minerals Recovery Corp → Sinbad Mine; 1980-04-01 to 1985-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Newman Eric → Minerals Recovery Corp; 1980-04-01 to 1985-11-21; source msha-controller-operator-history
- **operator_operates_mine:** Birco Development Inc → Sinbad Mine; 1985-11-22 to 1987-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Arthur Marion  Birch → Sinbad Mine; 1985-11-22 to 1987-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Arthur Marion  Birch → Birco Development Inc; 1985-11-22 to 1987-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Roedel Mining → Sinbad Mine; 1987-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roedel Mike & Billy → Sinbad Mine; 1987-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roedel Mike & Billy → Roedel Mining; 1987-02-03 to current/open; source msha-controller-operator-history