# Relationship history for MSHA mine 4404562

Current hierarchy: **Thyssen Schachtbau Gmbh → Carbomin Corp → Cc 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

- **operator_operates_mine:** National Energy Corp → Cc Dock; 1976-09-01 to 1989-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Fuller Rual → Cc Dock; 1976-09-01 to 1989-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Fuller Rual → National Energy Corp; 1976-09-01 to 1989-07-09; source msha-controller-operator-history
- **operator_operates_mine:** National Energy Corp → Cc Dock; 1989-07-10 to 1990-11-25; source msha-controller-operator-history
- **controller_controls_mine:** King Koals Inc → Cc Dock; 1989-07-10 to 1990-11-25; source msha-controller-operator-history
- **controller_controls_operator:** King Koals Inc → National Energy Corp; 1989-07-10 to 1990-11-25; source msha-controller-operator-history
- **controller_controls_mine:** Thyssen Schachtbau Gmbh → Cc Dock; 1990-03-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carbomin Corp → Cc Dock; 1990-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thyssen Schachtbau Gmbh → Carbomin Corp; 1990-11-26 to current/open; source msha-controller-operator-history