# Relationship history for MSHA mine 4003075

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC → ELIZABETHTON 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Asarco Inc → ELIZABETHTON QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Limestone Company Inc → ELIZABETHTON QUARRY; 1993-10-01 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Asarco Inc → American Limestone Company Inc; 1993-10-01 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Aggregates USA Holdings LLC → ELIZABETHTON QUARRY; 2010-02-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggregates USA, LLC → ELIZABETHTON QUARRY; 2012-05-04 to 2017-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Aggregates USA Holdings LLC → Aggregates USA, LLC; 2012-05-04 to 2017-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings LLC → ELIZABETHTON QUARRY; 2017-12-29 to 2024-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries → ELIZABETHTON QUARRY; 2017-12-30 to 2024-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Blue Water Industries Holdings LLC → Blue Water Industries; 2017-12-30 to 2024-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → ELIZABETHTON QUARRY; 2024-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Blue Water Industries; 2024-04-29 to 2024-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Southeast Agg Operations, LLC → ELIZABETHTON QUARRY; 2024-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → ELIZABETHTON QUARRY; 2024-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC; 2024-12-12 to current/open; source msha-controller-operator-history