# Relationship history for MSHA mine 3000060

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Northeast-LLC → Jamesville 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

- **controller_controls_mine:** Koppers Company Inc → Jamesville Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Allied Corp-Allied Chemical Company → Jamesville Plant; 1950-01-01 to 1986-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Allied-Signal Inc → Jamesville Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allied-Signal Inc → Allied Corp-Allied Chemical Company; 1950-01-01 to 1986-03-05; source msha-controller-operator-history
- **operator_operates_mine:** General Crushed Stone Company → Jamesville Plant; 1986-03-06 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → General Crushed Stone Company; 1986-03-06 to 1988-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast-NY LLC → Jamesville Plant; 1988-11-14 to 2025-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Jamesville Plant; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast-NY LLC; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Jamesville 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 2025-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast-LLC → Jamesville Plant; 2025-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast-LLC; 2025-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast-LLC; 2025-05-19 to 2007-08-22; source msha-controller-operator-history