# Relationship history for MSHA mine 1300694

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Aggregates → AUBURN SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → AUBURN SAND & GRAVEL; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hosteng Concrete & Gravel Inc → AUBURN SAND & GRAVEL; 1950-01-01 to 1992-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Hosteng Don → AUBURN SAND & GRAVEL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hosteng Don → Hosteng Concrete & Gravel Inc; 1950-01-01 to 1992-07-12; source msha-controller-operator-history
- **controller_controls_mine:** William H  Giese → AUBURN SAND & GRAVEL; 1980-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Giese Construction Company Inc → AUBURN SAND & GRAVEL; 1992-07-13 to 1997-04-30; source msha-controller-operator-history
- **controller_controls_operator:** William H  Giese → Giese Construction Company Inc; 1992-07-13 to 1997-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Nuckoll'S Aggregates Inc → AUBURN SAND & GRAVEL; 1997-05-01 to 1997-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Scott L Temple et al → AUBURN SAND & GRAVEL; 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 → AUBURN SAND & GRAVEL; 1997-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1997-05-17 to current/open; source msha-controller-operator-history