# Relationship history for MSHA mine 2301711

Current hierarchy: **Francis John → John Francis Clay Mining & Hauling → Angel 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

- **controller_controls_mine:** Francis John → Angel Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John Francis Clay Mining & Hauling → Angel Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francis John → John Francis Clay Mining & Hauling; 1978-03-09 to current/open; source msha-controller-operator-history