# Relationship history for MSHA mine 4609069

Current hierarchy: **Billy R  Daugherty → Darty Leasing, Inc. → Mine No. 6**

- 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:** Billy R  Daugherty → Mine No. 6; 1991-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Cline → Mine No. 6; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry L  Matney → Mine No. 6; 2001-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** War Eagle Energy Inc → Mine No. 6; 2004-10-15 to 2005-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Terry L  Matney → War Eagle Energy Inc; 2004-10-15 to 2005-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Rock N Roll Coal Company Inc → Mine No. 6; 2005-02-01 to 2005-05-14; source msha-controller-operator-history
- **controller_controls_operator:** David  Cline → Rock N Roll Coal Company Inc; 2005-02-01 to 2005-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Darty Leasing, Inc. → Mine No. 6; 2005-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy R  Daugherty → Darty Leasing, Inc.; 2005-05-15 to current/open; source msha-controller-operator-history