# Relationship history for MSHA mine 1300620

Current hierarchy: **CRH PLC → Hallett Materials → Emmetsburg Pit**

- 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:** Mid-West Construction Materials Company → Emmetsburg Pit; 1950-01-01 to 1991-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Larry E  Moore → Emmetsburg Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry E  Moore → Mid-West Construction Materials Company; 1950-01-01 to 1991-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Emmettsburg Sand & Gravel → Emmetsburg Pit; 1991-04-18 to 1997-04-30; source msha-controller-operator-history
- **controller_controls_mine:** William H  Giese → Emmetsburg Pit; 1991-04-18 to 1997-04-30; source msha-controller-operator-history
- **controller_controls_operator:** William H  Giese → Emmettsburg Sand & Gravel; 1991-04-18 to 1997-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Nuckoll'S Aggregates Inc → Emmetsburg Pit; 1997-05-01 to 1997-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Scott L Temple et al → Emmetsburg Pit; 1997-05-01 to 1997-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Scott L Temple et al → Nuckoll'S Aggregates Inc; 1997-05-01 to 1997-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates Of Iowa Inc → Emmetsburg Pit; 1997-05-17 to 2003-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Emmetsburg Pit; 1997-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates Of Iowa Inc; 1997-05-17 to 2003-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Rasmussen Group Inc → Emmetsburg Pit; 1999-04-01 to 2001-08-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Emmetsburg Pit; 2001-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials → Emmetsburg Pit; 2003-04-10 to 2008-01-02; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials; 2003-04-10 to 2008-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Rasmussen Group Inc → Hallett Materials; 2003-04-10 to 2001-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials → Emmetsburg Pit; 2008-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Emmetsburg Pit; 2008-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials; 2008-01-03 to current/open; source msha-controller-operator-history