# Relationship history for MSHA mine 3606829

Current hierarchy: **Robert  Eggleston → Carbon Sales Inc → Carbon Bagging Plant**

- 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:** Carbon Sales Inc → Carbon Bagging Plant; 1979-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Eggleston et al → Carbon Bagging Plant; 1979-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Eggleston et al → Carbon Sales Inc; 1979-04-01 to current/open; source msha-controller-operator-history