# Relationship history for MSHA mine 2401614

Current hierarchy: **Brown Carl & Donald Staley → Silver Springs Mining → New Departure**

- 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:** New Departure Mine Association → New Departure; 1981-04-01 to 1989-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Tanner Earl D-John W Currie Et Al → New Departure; 1981-04-01 to 1989-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Tanner Earl D-John W Currie Et Al → New Departure Mine Association; 1981-04-01 to 1989-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Silver Springs Mining → New Departure; 1989-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brown Carl & Donald Staley → New Departure; 1989-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Carl & Donald Staley → Silver Springs Mining; 1989-06-29 to current/open; source msha-controller-operator-history