# Relationship history for MSHA mine 4200770

Current hierarchy: **Harrison Pete → South Fork Mining Company → Yellow Circle 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

- **operator_operates_mine:** S & S Mining Company Inc → Yellow Circle Mine; 1950-01-01 to 1979-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Stocks Clayton Et Al → Yellow Circle Mine; 1950-01-01 to 1982-12-07; source msha-controller-operator-history
- **controller_controls_operator:** Stocks Clayton Et Al → S & S Mining Company Inc; 1950-01-01 to 1979-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Larry & Jody → Yellow Circle Mine; 1978-05-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Larry & Jody Shumway Mining → Yellow Circle Mine; 1979-09-19 to 1980-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Larry & Jody → Larry & Jody Shumway Mining; 1979-09-19 to 1980-10-31; source msha-controller-operator-history
- **operator_operates_mine:** South Fork Mining Company → Yellow Circle Mine; 1980-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harrison Pete → Yellow Circle Mine; 1980-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harrison Pete → South Fork Mining Company; 1980-11-01 to current/open; source msha-controller-operator-history