# Relationship history for MSHA mine 0301980

Current hierarchy: **Scott A  Valentine; Wray Scott  Valentine → V-Tech Sand, LLC → V-Tech Sand, LLC**

- 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:** Specialty Sands LLC → V-Tech Sand, LLC; 2008-12-01 to 2010-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Christie  Klotz et al → V-Tech Sand, LLC; 2008-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christie  Klotz et al → Specialty Sands LLC; 2008-12-01 to 2010-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Victor S  Klotz et al → Specialty Sands LLC; 2008-12-01 to 2010-04-25; source msha-controller-operator-history
- **operator_operates_mine:** V-Tech Sand, LLC → V-Tech Sand, LLC; 2010-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Victor S  Klotz et al → V-Tech Sand, LLC; 2010-04-26 to 2011-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Victor S  Klotz et al → V-Tech Sand, LLC; 2010-04-26 to 2011-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Wray Scott  Valentine et al → V-Tech Sand, LLC; 2011-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wray Scott  Valentine et al → V-Tech Sand, LLC; 2011-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott A  Valentine et al → V-Tech Sand, LLC; 2011-06-03 to current/open; source msha-controller-operator-history