# Relationship history for MSHA mine 2103037

Current hierarchy: **CRH PLC → Minnesota Paving & Materials → 01825**

- 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:** Sibley Aggregates → 01825; 1991-06-01 to 2017-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Connie A  Chard et al → 01825; 1991-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Connie A  Chard et al → Sibley Aggregates; 1991-06-01 to 2017-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Chard ET AL → Sibley Aggregates; 1991-06-01 to 2017-03-22; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → 01825; 2008-01-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minnesota Paving & Materials → 01825; 2017-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Minnesota Paving & Materials; 2017-03-23 to current/open; source msha-controller-operator-history