# Relationship history for MSHA mine 4105431

Current hierarchy: **Claudett  Espinoza; Juan  Diosdado → Imperial Products Supply, LLC → San Saba Quarry**

- 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

- **controller_controls_mine:** Mariano  Rodriguez et al → San Saba Quarry; 2009-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San Felipe Stone Inc → San Saba Quarry; 2019-05-09 to 2020-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Mariano  Rodriguez et al → San Felipe Stone Inc; 2019-05-09 to 2020-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Juvencio  Armenta et al → San Felipe Stone Inc; 2019-05-09 to 2020-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Juan  Diosdado et al → San Saba Quarry; 2019-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margarito  Espinoza → San Saba Quarry; 2020-05-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IPS San Felipe Stone, LLC → San Saba Quarry; 2020-05-27 to 2022-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Margarito  Espinoza → IPS San Felipe Stone, LLC; 2020-05-27 to 2022-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Imperial Products Supply, LLC → San Saba Quarry; 2022-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Juan  Diosdado et al → Imperial Products Supply, LLC; 2022-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Claudett  Espinoza et al → Imperial Products Supply, LLC; 2022-11-01 to current/open; source msha-controller-operator-history