# Relationship history for MSHA mine 3102204

Current hierarchy: **John J  Earnhardt; Angie H  Earnhardt → C K Earnhardt & Son Inc → Williams Pit**

- 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:** C K Earnhardt & Son Inc → Williams Pit; 2005-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angie H  Earnhardt  et al → Williams Pit; 2005-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angie H  Earnhardt  et al → C K Earnhardt & Son Inc; 2005-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Earnhardt  et al → C K Earnhardt & Son Inc; 2005-01-05 to current/open; source msha-controller-operator-history