# Relationship history for MSHA mine 3002735

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Northeast-NY LLC → Great Bend 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:** Pulaski Materials → Great Bend Plant; 1986-05-01 to 2000-02-17; source msha-controller-operator-history
- **controller_controls_mine:** R E  Garman  et al → Great Bend Plant; 1986-05-01 to 2000-02-17; source msha-controller-operator-history
- **controller_controls_operator:** R E  Garman  et al → Pulaski Materials; 1986-05-01 to 2000-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Great Bend Plant; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast-NY LLC → Great Bend Plant; 2000-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast-NY LLC; 2000-02-18 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Great Bend Plant; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast-NY LLC; 2007-08-23 to current/open; source msha-controller-operator-history