# Relationship history for MSHA mine 1510462

Current hierarchy: **Hatten C R → Colonial Elkhorn Coal Corp → No 1 Tipple**

- 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:** Colonial Elkhorn Coal Corp → No 1 Tipple; 1977-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hatten C R → No 1 Tipple; 1977-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hatten C R → Colonial Elkhorn Coal Corp; 1977-06-01 to current/open; source msha-controller-operator-history