# Relationship history for MSHA mine 1100024

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc. → Nokomis Quarry**

- 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:** General Dynamics Corp → Nokomis Quarry; 1950-01-01 to 2006-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Central Illinois Stone Company Inc → Nokomis Quarry; 1950-01-01 to 1990-11-26; source msha-controller-operator-history
- **controller_controls_mine:** Fernand A  Guyot Jr → Nokomis Quarry; 1950-01-01 to 1990-11-26; source msha-controller-operator-history
- **controller_controls_operator:** Fernand A  Guyot Jr → Central Illinois Stone Company Inc; 1950-01-01 to 1990-11-26; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Nokomis Quarry; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Material Service → Nokomis Quarry; 1990-11-27 to 2021-01-31; source msha-controller-operator-history
- **controller_controls_operator:** General Dynamics Corp → Hanson Material Service; 1990-11-27 to 2006-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Nokomis Quarry; 2006-06-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Material Service; 2006-06-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Nokomis Quarry; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Material Service; 2007-08-23 to 2021-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Midwest Agg, Inc. → Nokomis Quarry; 2021-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc.; 2021-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Midwest Agg, Inc.; 2021-02-01 to 2007-08-22; source msha-controller-operator-history