# Relationship history for MSHA mine 0504123

Current hierarchy: **Matthew  Sprague → Carter Lake Enterprises Inc → Carter Lake Enterprises Inc**

- 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:** Carter Lake Enterprises Inc → Carter Lake Enterprises Inc; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Sprague  et al → Carter Lake Enterprises Inc; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Sprague  et al → Carter Lake Enterprises Inc; 1985-09-01 to current/open; source msha-controller-operator-history