# Relationship history for MSHA mine 2102765

Current hierarchy: **Brian R Roth → Rocon Paving → Portable Plant #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Roth Construction → Portable Plant #1; 1980-04-01 to 2015-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Roth Construction → Portable Plant #1; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roth Construction → Roth Construction; 1980-04-01 to 2015-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Rocon Paving → Portable Plant #1; 2015-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian R Roth → Portable Plant #1; 2015-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian R Roth → Rocon Paving; 2015-05-15 to current/open; source msha-controller-operator-history