# Relationship history for MSHA mine 1103152

Current hierarchy: **Josh  Voss; Dan  Voss → Voss Sandworks West Inc. → Ottawa 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:** Dan  Voss et al → Ottawa Plant; 2003-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Voss SandWorks, Inc → Ottawa Plant; 2005-08-01 to 2009-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Voss et al → Voss SandWorks, Inc; 2005-08-01 to 2009-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Voss et al → Voss SandWorks, Inc; 2005-08-01 to 2009-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Voss Sandworks West Inc. → Ottawa Plant; 2009-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Voss → Ottawa Plant; 2009-08-06 to 2012-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Voss → Voss Sandworks West Inc.; 2009-08-06 to 2012-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Voss et al → Ottawa Plant; 2012-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Voss et al → Voss Sandworks West Inc.; 2012-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Voss et al → Voss Sandworks West Inc.; 2012-01-12 to current/open; source msha-controller-operator-history