# Relationship history for MSHA mine 1519098

Current hierarchy: **Amy C  Hamilton → T & T Energy LLC → Wolf Creek Surface #3**

- 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:** David L  Hansen → Wolf Creek Surface #3; 2007-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** DRT Grading & Excavating Inc → Wolf Creek Surface #3; 2007-04-09 to 2009-08-27; source msha-controller-operator-history
- **controller_controls_operator:** David L  Hansen → DRT Grading & Excavating Inc; 2007-04-09 to 2009-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Amy C  Hamilton → Wolf Creek Surface #3; 2008-08-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leslie Mountain Coal Company Inc. → Wolf Creek Surface #3; 2009-08-28 to 2009-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Foster → Wolf Creek Surface #3; 2009-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Foster → Leslie Mountain Coal Company Inc.; 2009-08-28 to 2009-11-01; source msha-controller-operator-history
- **operator_operates_mine:** T & T Energy LLC → Wolf Creek Surface #3; 2009-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy C  Hamilton → T & T Energy LLC; 2009-11-02 to current/open; source msha-controller-operator-history