# Relationship history for MSHA mine 3901281

Current hierarchy: **Atlantic Richfield Company → Anaconda Minerals Company → Golden Reward 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:** Atlantic Richfield Company → Golden Reward Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hoffman Maurice → Golden Reward Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Strawberry Hill Mining Company Inc → Golden Reward Mine; 1981-12-01 to 1982-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Hoffman Maurice → Strawberry Hill Mining Company Inc; 1981-12-01 to 1982-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Anaconda Minerals Company → Golden Reward Mine; 1982-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Atlantic Richfield Company → Anaconda Minerals Company; 1982-01-20 to current/open; source msha-controller-operator-history