# Relationship history for MSHA mine 3901236

Current hierarchy: **Swanson Gilbert C Jr → Gilbert C Swanson Foundation Incorp → Golden Dawn 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:** Van Horne John E → Golden Dawn Mine; 1980-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Concepts West Inc → Golden Dawn Mine; 1980-06-01 to 1982-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Van Horne John E → Concepts West Inc; 1980-06-01 to 1982-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Swanson Gilbert C Jr → Golden Dawn Mine; 1982-11-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gilbert C Swanson Foundation Incorp → Golden Dawn Mine; 1982-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Swanson Gilbert C Jr → Gilbert C Swanson Foundation Incorp; 1982-12-07 to current/open; source msha-controller-operator-history