# Relationship history for MSHA mine 2602786

Current hierarchy: **Granite Construction Inc → Centennial Aggregate Inc DBA Cinderlite Aggregates → Screen #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Gary  Lehman → Screen #1; 2001-09-26 to 2025-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Cinderlite Trucking Corporation → Screen #1; 2015-10-26 to 2026-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Lehman → Cinderlite Trucking Corporation; 2015-10-26 to 2025-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Screen #1; 2025-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Cinderlite Trucking Corporation; 2025-10-06 to 2026-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Screen #1; 2026-03-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cinderlite Aggregates → Screen #1; 2026-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Cinderlite Aggregates; 2026-03-18 to current/open; source msha-controller-operator-history