# Relationship history for MSHA mine 4405863

Current hierarchy: **El Paso Energy Corp → Coastal Coal Company Llc → Phipps 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

- **operator_operates_mine:** Phipps Dock Inc → Phipps Dock; 1982-03-01 to 1987-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Meade Vester-Clifford Davis Et Al → Phipps Dock; 1982-03-01 to 1987-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Meade Vester-Clifford Davis Et Al → Phipps Dock Inc; 1982-03-01 to 1987-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal Company Llc → Phipps Dock; 1987-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Phipps Dock; 1989-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal Company Llc; 1989-04-04 to current/open; source msha-controller-operator-history