# Relationship history for MSHA mine 4104631

Current hierarchy: **Summit Materials LLC → Alleyton Resource Company LLC → Hanna's Bend 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hanna's Bend Aggregate → Hanna's Bend Plant; 2006-11-16 to 2014-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Robert C.  Herrington → Hanna's Bend Plant; 2006-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C.  Herrington → Hanna's Bend Aggregate; 2006-11-16 to 2014-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Barten Et Al → Hanna's Bend Plant; 2010-03-19 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Hanna's Bend Plant; 2014-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hanna's Bend Aggregate → Hanna's Bend Plant; 2014-02-07 to 2017-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Chad  Herrington et al → Hanna's Bend Plant; 2014-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Herrington et al → Hanna's Bend Aggregate; 2014-02-07 to 2017-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Herrington et al → Hanna's Bend Aggregate; 2014-02-07 to 2017-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Alleyton Resource Company LLC → Hanna's Bend Plant; 2017-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Barten Et Al → Alleyton Resource Company LLC; 2017-10-30 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Alleyton Resource Company LLC; 2017-10-30 to current/open; source msha-controller-operator-history