# Relationship history for MSHA mine 4606195

Current hierarchy: **White Mountain Mining Co., LLC → Sundance Coal Company → Hernshaw No 2**

- 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:** D A R N Coal Company Inc → Hernshaw No 2; 1980-08-01 to 1991-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Paul R  Phillips et al → Hernshaw No 2; 1980-08-01 to 1991-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Phillips et al → D A R N Coal Company Inc; 1980-08-01 to 1991-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Banner Holding Ltd → Hernshaw No 2; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White Mountain Mining Co., LLC → Hernshaw No 2; 1986-10-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rush Run Coal Company Inc → Hernshaw No 2; 1991-01-22 to 1992-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Banner Holding Ltd → Rush Run Coal Company Inc; 1991-01-22 to 1992-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Red Fox Coal Company → Hernshaw No 2; 1992-02-21 to 1993-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Everett E  Ballard Jr → Hernshaw No 2; 1992-02-21 to 1993-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Everett E  Ballard Jr → Red Fox Coal Company; 1992-02-21 to 1993-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Crossroads Mining Inc → Hernshaw No 2; 1993-04-28 to 1994-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Cline Larry → Hernshaw No 2; 1993-04-28 to 1994-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Cline Larry → Crossroads Mining Inc; 1993-04-28 to 1994-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Sundance Coal Company → Hernshaw No 2; 1994-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Mountain Mining Co., LLC → Sundance Coal Company; 1994-01-05 to current/open; source msha-controller-operator-history