# Relationship history for MSHA mine 1901289

Current hierarchy: **John D  Durkin → Onyx Corporation → Littleton 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:** John D  Durkin → Littleton Pit; 2007-09-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Onyx Corporation → Littleton Pit; 2020-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John D  Durkin → Onyx Corporation; 2020-02-04 to current/open; source msha-controller-operator-history