# Relationship history for MSHA mine 0504882

Current hierarchy: **Richard  Connell → Connell Resources Inc → Portable Crusher #4**

- 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:** Richard  Connell → Portable Crusher #4; 1982-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Connell Resources Inc → Portable Crusher #4; 2007-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Connell → Connell Resources Inc; 2007-09-18 to current/open; source msha-controller-operator-history