# Relationship history for MSHA mine 4608268

Current hierarchy: **James River Coal Company → Rockhouse Creek Development LLC → 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

- **operator_operates_mine:** Kazin Coal Inc → No. 6; 1992-02-01 to 1993-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Stephen  Hairston → No. 6; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Hairston → Kazin Coal Inc; 1992-02-01 to 1993-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Bar-B Trucking Inc → No. 6; 1993-10-13 to 2004-09-08; source msha-controller-operator-history
- **controller_controls_mine:** Huffman Glen A Jr → No. 6; 1993-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Huffman Glen A Jr → Bar-B Trucking Inc; 1993-10-13 to 2004-09-08; source msha-controller-operator-history
- **controller_controls_mine:** International Industries Inc → No. 6; 1999-06-01 to 2007-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Rockhouse Creek Development LLC → No. 6; 2004-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Industries Inc → Rockhouse Creek Development LLC; 2004-09-09 to 2007-07-15; source msha-controller-operator-history
- **controller_controls_mine:** International Resources LLC → No. 6; 2007-07-16 to 2011-04-17; source msha-controller-operator-history
- **controller_controls_operator:** International Resources LLC → Rockhouse Creek Development LLC; 2007-07-16 to 2011-04-17; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → No. 6; 2011-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Rockhouse Creek Development LLC; 2011-04-18 to current/open; source msha-controller-operator-history