# Relationship history for MSHA mine 4105579

Current hierarchy: **Curtis Glenn Thurman → Thurman Transportation Inc. → 3136**

- 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:** Curtis Glenn Thurman et al → 3136; 1990-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thurman Transportation Inc. → 3136; 2021-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis Glenn Thurman et al → Thurman Transportation Inc.; 2021-08-25 to current/open; source msha-controller-operator-history