# Relationship history for MSHA mine 2402665

Current hierarchy: **Christopher J  Noble → Noble Excavating Inc. → Portable #2**

- 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:** Christopher J  Noble → Portable #2; 2005-04-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Noble Excavating Inc. → Portable #2; 2014-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher J  Noble → Noble Excavating Inc.; 2014-01-14 to current/open; source msha-controller-operator-history