# Relationship history for MSHA mine 1103268

Current hierarchy: **USS Holdings Inc → US Silica → Utica Silica**

- 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 → Utica Silica; 1996-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quality Sand Products, LLC. → Utica Silica; 2014-02-13 to 2015-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Voss et al → Utica Silica; 2014-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Voss et al → Quality Sand Products, LLC.; 2014-02-13 to 2015-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Voss et al → Quality Sand Products, LLC.; 2014-02-13 to 2015-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Utica Silica, LLC → Utica Silica; 2015-05-08 to 2019-05-16; source msha-controller-operator-history
- **controller_controls_mine:** USS Holdings Inc → Utica Silica; 2015-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** USS Holdings Inc → Utica Silica, LLC; 2015-05-08 to 2019-05-16; source msha-controller-operator-history
- **operator_operates_mine:** US Silica → Utica Silica; 2019-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** USS Holdings Inc → US Silica; 2019-05-17 to current/open; source msha-controller-operator-history