# Relationship history for MSHA mine 1302399

Current hierarchy: **Ronald L Weymiller → Ron Weymiller Construction → Staggemeyer 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

- **operator_operates_mine:** WW Quarry → Staggemeyer Quarry; 2009-08-03 to 2020-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Ron L  Weymiller et al → Staggemeyer Quarry; 2009-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron L  Weymiller et al → WW Quarry; 2009-08-03 to 2020-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Don D  Weymiller et al → WW Quarry; 2009-08-03 to 2020-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Ron Weymiller Construction → Staggemeyer Quarry; 2020-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald L Weymiller → Staggemeyer Quarry; 2020-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald L Weymiller → Ron Weymiller Construction; 2020-02-20 to current/open; source msha-controller-operator-history