# Relationship history for MSHA mine 4403735

Current hierarchy: **Island Creek Pocahontas Co & Alixa Mining Corp → Vp-5 Mining Company → Deel 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Fuller Rual → Deel Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Atomic Fuel Coal Company Inc → Deel Dock; 1974-01-01 to 1977-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Fuller Rual → Atomic Fuel Coal Company Inc; 1974-01-01 to 1977-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Excello Coal Corp → Deel Dock; 1975-08-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Excello Coal Corp → Deel Dock; 1977-02-02 to 1979-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Excello Coal Corp → Excello Coal Corp; 1977-02-02 to 1979-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Vp-5 Mining Company → Deel Dock; 1979-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Island Creek Pocahontas Co & Alixa Mining Corp → Deel Dock; 1979-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Island Creek Pocahontas Co & Alixa Mining Corp → Vp-5 Mining Company; 1979-07-20 to current/open; source msha-controller-operator-history