# Relationship history for MSHA mine 4105141

Current hierarchy: **Francisco  Estrada → Patriot Mining and Materials, LLC → CDE No. 1**

- 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:** Patriot Mining and Materials, LLC → CDE No. 1; 2015-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Failey et al → CDE No. 1; 2015-07-15 to 2022-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Failey et al → Patriot Mining and Materials, LLC; 2015-07-15 to 2022-03-31; source msha-controller-operator-history
- **controller_controls_operator:** David R  Wittwer et al → Patriot Mining and Materials, LLC; 2015-07-15 to 2022-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Francisco  Estrada → CDE No. 1; 2022-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francisco  Estrada → Patriot Mining and Materials, LLC; 2022-04-01 to current/open; source msha-controller-operator-history