# Relationship history for MSHA mine 0103111

Current hierarchy: **Sheehan William O → William O Sheehan → SHEEHAN 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:** William O Sheehan → SHEEHAN PIT; 1997-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sheehan William O → SHEEHAN PIT; 1997-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sheehan William O → William O Sheehan; 1997-12-01 to current/open; source msha-controller-operator-history