# Relationship history for MSHA mine 3601682

Current hierarchy: **Great American Coal Company → Gilco Inc → Taylor Breaker**

- 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:** Gilco Inc → Taylor Breaker; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Gillen John → Taylor Breaker; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Gillen John → Gilco Inc; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Gilco Inc → Taylor Breaker; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Great American Coal Company → Taylor Breaker; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great American Coal Company → Gilco Inc; 1974-01-01 to current/open; source msha-controller-operator-history