# Relationship history for MSHA mine 4102916

Current hierarchy: **Summit Materials LLC → Alleyton Resource Company, LLC. → Wegenhoft 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:** South Texas Excavation & Mining Company Inc → Wegenhoft Plant; 1979-01-01 to 2000-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Mc Carty Dan → Wegenhoft Plant; 1979-01-01 to 2000-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Carty Dan → South Texas Excavation & Mining Company Inc; 1979-01-01 to 2000-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Multisources Ltd → Wegenhoft Plant; 2000-02-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Lee  McCarty et al → Wegenhoft Plant; 2000-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee  McCarty et al → Multisources Ltd; 2000-02-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dan  McCarty et al → Multisources Ltd; 2000-02-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Barten Et Al → Wegenhoft Plant; 2010-03-19 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Dan  McCarty et al → Wegenhoft Plant; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Wegenhoft Plant; 2014-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Multisource Sand & Gravel Co., LTD → Wegenhoft Plant; 2017-01-01 to 2020-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Dan  McCarty et al → Multisource Sand & Gravel Co., LTD; 2017-01-01 to 2020-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Lee  McCarty et al → Multisource Sand & Gravel Co., LTD; 2017-01-01 to 2020-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Alleyton Resource Company, LLC. → Wegenhoft Plant; 2020-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Barten Et Al → Alleyton Resource Company, LLC.; 2020-07-10 to 2014-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Alleyton Resource Company, LLC.; 2020-07-10 to current/open; source msha-controller-operator-history