# Relationship history for MSHA mine 4104416

Current hierarchy: **Donna  Tesch; Bruce  Tesch → B&D Sand and Gravel → 4L Ranch**

- 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:** Allied Aggregates → 4L Ranch; 2003-05-02 to 2010-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Leaman → 4L Ranch; 2003-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Leaman → Allied Aggregates; 2003-05-02 to 2010-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Alleyton Resource Company LLC → 4L Ranch; 2010-03-19 to 2021-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Barten Et Al → 4L Ranch; 2010-03-19 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Barten Et Al → Alleyton Resource Company LLC; 2010-03-19 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → 4L Ranch; 2014-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Alleyton Resource Company LLC; 2014-01-23 to 2021-05-02; source msha-controller-operator-history
- **operator_operates_mine:** B&D Sand and Gravel → 4L Ranch; 2021-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donna  Tesch et al → 4L Ranch; 2021-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna  Tesch et al → B&D Sand and Gravel; 2021-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Tesch et al → B&D Sand and Gravel; 2021-05-03 to current/open; source msha-controller-operator-history