# Relationship history for MSHA mine 4503265

Current hierarchy: **Echo Bay Mines Ltd → Echo Bay Minerals Company → LAMEFOOT MINE SITE**

- 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:** Echo Bay Mines Ltd → LAMEFOOT MINE SITE; 1986-11-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Echo Bay Minerals Company → LAMEFOOT MINE SITE; 1992-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Echo Bay Mines Ltd → Echo Bay Minerals Company; 1992-05-01 to current/open; source msha-controller-operator-history