# Relationship history for MSHA mine 2103141

Current hierarchy: **Roth Gary G → Grand Lake Aggregates Inc → GRAND LAKE AGGREGATE'S 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:** Grand Lake Aggregates Inc → GRAND LAKE AGGREGATE'S INC.; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roth Gary G → GRAND LAKE AGGREGATE'S INC.; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roth Gary G → Grand Lake Aggregates Inc; 1997-06-01 to current/open; source msha-controller-operator-history