# Relationship history for MSHA mine 4201663

Current hierarchy: **Isford A A → Crater Exploration Inc → Taylor Placer**

- 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:** Stocks Clayton Et Al → Taylor Placer; 1950-01-01 to 1982-12-07; source msha-controller-operator-history
- **operator_operates_mine:** S & S Mining Company Inc → Taylor Placer; 1980-01-01 to 1981-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Stocks Clayton Et Al → S & S Mining Company Inc; 1980-01-01 to 1981-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Winecup Resources Inc → Taylor Placer; 1981-06-10 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Don & Jerry Zabriskie → Taylor Placer; 1981-06-10 to 1984-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Don & Jerry Zabriskie → Winecup Resources Inc; 1981-06-10 to 1984-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Crater Exploration Inc → Taylor Placer; 1984-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Isford A A → Taylor Placer; 1984-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Isford A A → Crater Exploration Inc; 1984-01-12 to current/open; source msha-controller-operator-history