# Relationship history for MSHA mine 1519671

Current hierarchy: **Steven T Thompson; Aaron D Thompson; Danny  Thompson; Douglas  Thompson → T&T Coal Inc. → Laurel 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Morris G  Thompson → Laurel No. 1; 1991-11-01 to 2020-08-14; source msha-controller-operator-history
- **operator_operates_mine:** T&T Coal Inc. → Laurel No. 1; 2012-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morris G  Thompson → T&T Coal Inc.; 2012-08-06 to 2020-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Thompson et al → Laurel No. 1; 2020-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Thompson et al → T&T Coal Inc.; 2020-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven T Thompson et al → T&T Coal Inc.; 2020-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Thompson et al → T&T Coal Inc.; 2020-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron D Thompson et al → T&T Coal Inc.; 2020-08-15 to current/open; source msha-controller-operator-history