# Relationship history for MSHA mine 4404301

Current hierarchy: **El Paso Energy Corp → Virginia Iron Coal & Coke Company → Cranes Nest Dock**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** B Ray  Thompson → Cranes Nest Dock; 1975-09-29 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Collieries Inc → Cranes Nest Dock; 1976-03-03 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Cumberland Collieries Inc; 1976-03-03 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Cranes Nest Dock; 1979-06-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Collieries Inc → Cranes Nest Dock; 1979-11-01 to 1981-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Cranes Nest Dock; 1979-11-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Cumberland Collieries Inc; 1979-11-01 to 1981-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Iron Coal & Coke Company → Cranes Nest Dock; 1981-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Virginia Iron Coal & Coke Company; 1981-05-12 to current/open; source msha-controller-operator-history