# Relationship history for MSHA mine 1507147

Current hierarchy: **Adams Stuart H → Adams Coal Enterprises → 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:** Adams Coal Enterprises → No 1 Tipple; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Stuart H → No 1 Tipple; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Stuart H → Adams Coal Enterprises; 1974-01-01 to current/open; source msha-controller-operator-history