# Relationship history for MSHA mine 1103269

Current hierarchy: **USS Holdings Inc → U.S. Silica Company → Peru Plant**

- 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:** USS Holdings Inc → Peru Plant; 1996-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Voss et al → Peru Plant; 2014-02-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quality Sand Products, LLC → Peru Plant; 2014-03-05 to 2015-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Voss et al → Quality Sand Products, LLC; 2014-03-05 to 2015-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Voss et al → Quality Sand Products, LLC; 2014-03-05 to 2015-01-08; source msha-controller-operator-history
- **operator_operates_mine:** U.S. Silica Company → Peru Plant; 2015-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** USS Holdings Inc → U.S. Silica Company; 2015-01-09 to current/open; source msha-controller-operator-history