# Relationship history for MSHA mine 1511637

Current hierarchy: **Bennett Ricky D → Bennett Sons → Little Joe**

- 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:** Bennett Ricky D Et Al → Little Joe; 1978-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bennett Sons → Little Joe; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Ricky D Et Al → Bennett Sons; 1978-10-01 to current/open; source msha-controller-operator-history