# Relationship history for MSHA mine 4608662

Current hierarchy: **James E  Trent → Century Energy Corporation → Joe Branch 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Gary D  Spurlock → Joe Branch No 1; 1992-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Cline → Joe Branch No 1; 1996-02-03 to 2000-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Speed Mining Inc → Joe Branch No 1; 1997-09-01 to 1998-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Cline → Speed Mining Inc; 1997-09-01 to 1998-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Copperas Coal Corp → Joe Branch No 1; 1998-12-15 to 2001-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Gary D  Spurlock → Copperas Coal Corp; 1998-12-15 to 2001-11-14; source msha-controller-operator-history
- **controller_controls_mine:** James E  Trent → Joe Branch No 1; 2000-08-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Century Energy Corporation → Joe Branch No 1; 2001-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Trent → Century Energy Corporation; 2001-11-15 to current/open; source msha-controller-operator-history