# Relationship history for MSHA mine 4104068

Current hierarchy: **Larry  Hurley → Quality Materials → QM1**

- 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:** Quality Materials → QM1; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Runnels Glen → QM1; 1999-03-01 to 2001-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Runnels Glen → Quality Materials; 1999-03-01 to 2001-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Webber → QM1; 2001-11-05 to 2010-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Webber → Quality Materials; 2001-11-05 to 2010-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Hurley et al → QM1; 2010-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Hurley et al → Quality Materials; 2010-06-18 to current/open; source msha-controller-operator-history