# Relationship history for MSHA mine 0404680

Current hierarchy: **Natasha  Van Veldhuizen → Stone Valley Materials, LLC → Pyrite Quarry**

- 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:** Jay P  Hubbs  et al → Pyrite Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paul Hubbs Construction Co → Pyrite Quarry; 1984-01-01 to 2006-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Jay P  Hubbs  et al → Paul Hubbs Construction Co; 1984-01-01 to 2006-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Riverside Mining Limited → Pyrite Quarry; 2006-06-12 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael L  Renner et al → Pyrite Quarry; 2006-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael L  Renner et al → Riverside Mining Limited; 2006-06-12 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Nanu  Patel et al → Riverside Mining Limited; 2006-06-12 to 2010-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Stone Valley Materials, LLC → Pyrite Quarry; 2010-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Natasha  Van Veldhuizen → Pyrite Quarry; 2010-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Natasha  Van Veldhuizen → Stone Valley Materials, LLC; 2010-04-01 to current/open; source msha-controller-operator-history