# Relationship history for MSHA mine 1519342

Current hierarchy: **Keith  Arnett; Lesley  Arnett → Mountain Top Hydroseeding Inc → S-2 Buckhorn**

- 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:** Amy C  Hamilton → S-2 Buckhorn; 2008-08-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T&T Energy LLC → S-2 Buckhorn; 2008-11-03 to 2009-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Amy C  Hamilton → T&T Energy LLC; 2008-11-03 to 2009-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Arnett et al → S-2 Buckhorn; 2009-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → S-2 Buckhorn; 2009-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Revelation Energy, LLC → S-2 Buckhorn; 2009-11-05 to 2011-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Revelation Energy, LLC; 2009-11-05 to 2011-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Top Hydroseeding Inc → S-2 Buckhorn; 2011-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Arnett et al → Mountain Top Hydroseeding Inc; 2011-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lesley  Arnett et al → Mountain Top Hydroseeding Inc; 2011-09-14 to current/open; source msha-controller-operator-history