# Relationship history for MSHA mine 0503890

Current hierarchy: **Trites Albert F → Echo Gold Corp → Mackay 444**

- 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

- **operator_operates_mine:** Elk Creek Gold Mines Company → Mackay 444; 1983-09-01 to 1991-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Jarratt Lowell E → Mackay 444; 1983-09-01 to 1991-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Jarratt Lowell E → Elk Creek Gold Mines Company; 1983-09-01 to 1991-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Echo Gold Corp → Mackay 444; 1991-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trites Albert F → Mackay 444; 1991-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trites Albert F → Echo Gold Corp; 1991-10-13 to current/open; source msha-controller-operator-history