# Relationship history for MSHA mine 3401963

Current hierarchy: **Terry  Harp → T-STONE → T-STONE #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

- **operator_operates_mine:** HUDLOW STONE → T-STONE #1; 2005-07-02 to 2008-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Clarence Lee  Hudlow → T-STONE #1; 2005-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clarence Lee  Hudlow → HUDLOW STONE; 2005-07-02 to 2008-03-23; source msha-controller-operator-history
- **operator_operates_mine:** T-STONE → T-STONE #1; 2008-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Harp → T-STONE #1; 2008-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Harp → T-STONE; 2008-03-24 to current/open; source msha-controller-operator-history