# Relationship history for MSHA mine 4608474

Current hierarchy: **Robert B  Hurley → Tazewell McDowell Coal, Inc. → No. 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:** Ronald  Combs et al → No. 1; 1985-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hiope Mining Inc → No. 1; 1995-03-01 to 1998-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Combs et al → Hiope Mining Inc; 1995-03-01 to 1998-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Break Thru Mining Inc → No. 1; 1998-01-16 to 2001-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Dowdy Dennis → No. 1; 1998-01-16 to 2001-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Dowdy Dennis → Break Thru Mining Inc; 1998-01-16 to 2001-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Hiope Mining Inc → No. 1; 2001-02-20 to 2002-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Combs et al → Hiope Mining Inc; 2001-02-20 to 2002-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Tazewell McDowell Coal, Inc. → No. 1; 2002-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Hurley → No. 1; 2002-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Hurley → Tazewell McDowell Coal, Inc.; 2002-05-20 to current/open; source msha-controller-operator-history