# Relationship history for MSHA mine 2100079

Current hierarchy: **Aggregate Industries PLC → Camas Minnesota → SHAKOPEE 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:** J L Shiely Company → SHAKOPEE PLANT; 1950-01-01 to 1988-07-18; source msha-controller-operator-history
- **controller_controls_mine:** J L Shiely  Company → SHAKOPEE PLANT; 1950-01-01 to 1988-07-18; source msha-controller-operator-history
- **controller_controls_operator:** J L Shiely  Company → J L Shiely Company; 1950-01-01 to 1988-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Shiely Company → SHAKOPEE PLANT; 1988-07-19 to 1994-09-21; source msha-controller-operator-history
- **controller_controls_mine:** English China Clays PLC → SHAKOPEE PLANT; 1988-07-19 to 1994-09-21; source msha-controller-operator-history
- **controller_controls_operator:** English China Clays PLC → Shiely Company; 1988-07-19 to 1994-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Shiely Company → SHAKOPEE PLANT; 1994-09-22 to 1997-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Camas Plc → SHAKOPEE PLANT; 1994-09-22 to 1997-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Camas Plc → Shiely Company; 1994-09-22 to 1997-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → SHAKOPEE PLANT; 1995-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camas Minnesota → SHAKOPEE PLANT; 1997-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Camas Minnesota; 1997-05-14 to current/open; source msha-controller-operator-history