# Relationship history for MSHA mine 4608491

Current hierarchy: **Christian C Lynch Iii → Imperial Colliery Company → Rich Creek Preparation 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Christian C Lynch Iii Et Al → Rich Creek Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Imperial Colliery Company → Rich Creek Preparation Plant; 1995-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian C Lynch Iii Et Al → Imperial Colliery Company; 1995-04-01 to current/open; source msha-controller-operator-history