# Relationship history for MSHA mine 1202244

Current hierarchy: **Blake M Blann; Martha M Blann → Putnam County Aggregates Inc → Greencastle 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Hanson PLC → Greencastle Quarry; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Midwest, LLC → Greencastle Quarry; 1998-11-01 to 2021-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Midwest, LLC; 1998-11-01 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Greencastle Quarry; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Midwest, LLC; 2007-08-23 to 2021-01-10; source msha-controller-operator-history
- **operator_operates_mine:** Putnam County Aggregates Inc → Greencastle Quarry; 2021-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blake M Blann et al → Greencastle Quarry; 2021-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blake M Blann et al → Putnam County Aggregates Inc; 2021-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martha M Blann et al → Putnam County Aggregates Inc; 2021-01-11 to current/open; source msha-controller-operator-history