# Relationship history for MSHA mine 1516961

Current hierarchy: **Moodie Boyce → Triple M Mining Corp → Lafayette Wash Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Moodie Boyce → Lafayette Wash Plant; 1990-03-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple M Mining Corp → Lafayette Wash Plant; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moodie Boyce → Triple M Mining Corp; 1990-09-01 to current/open; source msha-controller-operator-history