# Relationship history for MSHA mine 0404758

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Southern California Aggregates,LLC → EAGLE VALLEY AGGREGATES**

- 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:** Santa Ana River Rock Company → EAGLE VALLEY AGGREGATES; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Nicholas S  Mitchell → EAGLE VALLEY AGGREGATES; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Nicholas S  Mitchell → Santa Ana River Rock Company; 1985-08-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → EAGLE VALLEY AGGREGATES; 1987-05-01 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Boral Resources Inc → EAGLE VALLEY AGGREGATES; 1988-01-01 to 1995-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Boral Limited → EAGLE VALLEY AGGREGATES; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boral Limited → Boral Resources Inc; 1988-01-01 to 1995-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → EAGLE VALLEY AGGREGATES; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Pacific Southwest Inc → EAGLE VALLEY AGGREGATES; 1995-06-15 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Pacific Southwest Inc; 1995-06-15 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → EAGLE VALLEY AGGREGATES; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → EAGLE VALLEY AGGREGATES; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Pacific Southwest Inc; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Southern California Aggregates,LLC → EAGLE VALLEY AGGREGATES; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Martin Marietta Southern California Aggregates,LLC; 2021-10-01 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → EAGLE VALLEY AGGREGATES; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Southern California Aggregates,LLC; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Martin Marietta Southern California Aggregates,LLC; 2021-10-01 to 2007-08-22; source msha-controller-operator-history