# Relationship history for MSHA mine 4703708

Current hierarchy: **Robert C  Epping → TV Materials Inc → Hillside Aggregates**

- 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

- **controller_controls_mine:** Robert C  Epping → Hillside Aggregates; 2003-02-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Trenton Ventures LLC → Hillside Aggregates; 2014-04-02 to 2026-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Epping → Trenton Ventures LLC; 2014-04-02 to 2026-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Epping → Hillside Aggregates; 2023-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TV Materials Inc → Hillside Aggregates; 2026-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Epping → TV Materials Inc; 2026-03-30 to current/open; source msha-controller-operator-history