# Relationship history for MSHA mine 4404083

Current hierarchy: **Yates David → Quadrangle Resources Inc → No 1 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:** Matney Otis → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rockhouse Coal Corp → No 1 Mine; 1975-01-01 to 1976-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Matney Otis → Rockhouse Coal Corp; 1975-01-01 to 1976-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Matney Roger → No 1 Mine; 1976-05-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cherokee Coal Company → No 1 Mine; 1976-09-28 to 1978-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Matney Roger → Cherokee Coal Company; 1976-09-28 to 1978-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Davis Joe C Jr → No 1 Mine; 1977-06-01 to 1982-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Big Eagle Coal Corp → No 1 Mine; 1978-03-22 to 1982-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Davis Joe C Jr → Big Eagle Coal Corp; 1978-03-22 to 1982-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Splashdam Smokeless Coal Corp → No 1 Mine; 1982-10-12 to 1985-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Jordan Dave → No 1 Mine; 1982-10-12 to 1985-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Jordan Dave → Splashdam Smokeless Coal Corp; 1982-10-12 to 1985-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Quadrangle Resources Inc → No 1 Mine; 1985-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yates David → No 1 Mine; 1985-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yates David → Quadrangle Resources Inc; 1985-07-22 to current/open; source msha-controller-operator-history