# Relationship history for MSHA mine 1200004

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc. → Atkins Mine**

- 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:** Robert T  Liter et al → Atkins Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T J Atkins & Company Inc → Atkins Mine; 1950-01-01 to 1988-11-29; source msha-controller-operator-history
- **controller_controls_mine:** James T  Atkins → Atkins Mine; 1950-01-01 to 1988-11-29; source msha-controller-operator-history
- **controller_controls_operator:** James T  Atkins → T J Atkins & Company Inc; 1950-01-01 to 1988-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Atkins Mine; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Liter's Quarry Of Indiana Inc → Atkins Mine; 1988-11-30 to 2006-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Liter et al → Liter's Quarry Of Indiana Inc; 1988-11-30 to 2006-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Midwest Agg, Inc. → Atkins Mine; 2006-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Midwest Agg, Inc.; 2006-01-16 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Atkins Mine; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc.; 2007-08-23 to current/open; source msha-controller-operator-history