# Relationship history for MSHA mine 4105059

Current hierarchy: **Greg  Angel; Gary  Angel → Industrial Sand Products, LLC → ISP**

- 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:** Industrial Sand Products, LLC → ISP; 2014-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Angel et al → ISP; 2014-03-11 to 2018-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Angel et al → Industrial Sand Products, LLC; 2014-03-11 to 2018-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Danny C  Moore  et al → Industrial Sand Products, LLC; 2014-03-11 to 2018-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Angel et al → ISP; 2018-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Angel et al → Industrial Sand Products, LLC; 2018-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Angel et al → Industrial Sand Products, LLC; 2018-07-24 to current/open; source msha-controller-operator-history