# Relationship history for MSHA mine 2001360

Current hierarchy: **Robert  Guerin; Harold  Lipsitz → Natural Aggregates Corp → Romeo Plant**

- 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:** Natural Aggregates Corp → Romeo Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel N Pevos → Romeo Plant; 1950-01-01 to 2014-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Daniel N Pevos → Natural Aggregates Corp; 1950-01-01 to 2014-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Guerin et al → Romeo Plant; 2014-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Guerin et al → Natural Aggregates Corp; 2014-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Lipsitz et al → Natural Aggregates Corp; 2014-03-19 to current/open; source msha-controller-operator-history