# Relationship history for MSHA mine 3901126

Current hierarchy: **Salmen Carl A → Spokane Mining & Mill → Wood Tin 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Pendleton Mining → Wood Tin Mine; 1950-01-01 to 1983-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Pendleton Jack Jr → Wood Tin Mine; 1950-01-01 to 1983-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Pendleton Jack Jr → Pendleton Mining; 1950-01-01 to 1983-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Salmen Carl A → Wood Tin Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spokane Mining & Mill → Wood Tin Mine; 1983-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Salmen Carl A → Spokane Mining & Mill; 1983-01-11 to current/open; source msha-controller-operator-history