# Relationship history for MSHA mine 4002864

Current hierarchy: **Rice Robert → Fall Creek Coal Company Inc → No 1 Strip**

- 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:** Fall Creek Coal Company Inc → No 1 Strip; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rice Robert → No 1 Strip; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rice Robert → Fall Creek Coal Company Inc; 1984-10-01 to current/open; source msha-controller-operator-history