# Relationship history for MSHA mine 0505018

Current hierarchy: **Mike T  Anson → Anson Excavating → Moffat Limestone**

- 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

- **operator_operates_mine:** Anson Excavating → Moffat Limestone; 2013-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike T  Anson → Moffat Limestone; 2013-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike T  Anson → Anson Excavating; 2013-06-26 to current/open; source msha-controller-operator-history