# Relationship history for MSHA mine 4404921

Current hierarchy: **Sunoco, Inc. → Whitaker Coal Corp → No 1 Tipple**

- 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:** B Ray  Thompson → No 1 Tipple; 1975-09-29 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Collieries Inc → No 1 Tipple; 1977-12-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Cumberland Collieries Inc; 1977-12-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Collieries Inc → No 1 Tipple; 1979-11-01 to 1988-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → No 1 Tipple; 1979-11-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Cumberland Collieries Inc; 1979-11-01 to 1988-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → No 1 Tipple; 1983-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chrisley Coal Inc → No 1 Tipple; 1988-08-15 to 1991-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Dale Carroll → No 1 Tipple; 1988-08-15 to 1991-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Dale Carroll → Chrisley Coal Inc; 1988-08-15 to 1991-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Coal Corp → No 1 Tipple; 1991-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Whitaker Coal Corp; 1991-09-23 to current/open; source msha-controller-operator-history