# Relationship history for MSHA mine 1202310

Current hierarchy: **John J  Roskovensky → Roskovensky Aggregates LLC → Roskovensky Aggregates, LLC**

- 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:** Roskovensky Sand & Gravel, Inc. → Roskovensky Aggregates, LLC; 2001-08-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Robert  Roskkovensky → Roskovensky Aggregates, LLC; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Robert  Roskkovensky → Roskovensky Sand & Gravel, Inc.; 2001-08-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Roskovensky Aggregates LLC → Roskovensky Aggregates, LLC; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John J  Roskovensky → Roskovensky Aggregates, LLC; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Roskovensky → Roskovensky Aggregates LLC; 2014-01-01 to current/open; source msha-controller-operator-history