# Relationship history for MSHA mine 4000124

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC → WATAUGA 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

- **operator_operates_mine:** American Limestone Company Inc → WATAUGA QUARRY; 1950-01-01 to 1999-11-16; source msha-controller-operator-history
- **controller_controls_mine:** Asarco Inc → WATAUGA QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asarco Inc → American Limestone Company Inc; 1950-01-01 to 1999-11-16; source msha-controller-operator-history
- **operator_operates_mine:** American Limestone Company Inc → WATAUGA QUARRY; 1999-11-17 to 2000-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Grupo Mexico S A B de C V → WATAUGA QUARRY; 1999-11-17 to 2000-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Grupo Mexico S A B de C V → American Limestone Company Inc; 1999-11-17 to 2000-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials South Central, Inc. → WATAUGA QUARRY; 2000-07-01 to 2008-02-21; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → WATAUGA QUARRY; 2000-07-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials South Central, Inc.; 2000-07-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → WATAUGA QUARRY; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials South Central, Inc.; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → WATAUGA QUARRY; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials South Central, Inc.; 2007-07-10 to 2008-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Ready Mix USA Inc → WATAUGA QUARRY; 2008-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggregates USA LLC → WATAUGA QUARRY; 2008-02-22 to 2010-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Ready Mix USA Inc → Aggregates USA LLC; 2008-02-22 to 2010-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Aggregates USA LLC → WATAUGA QUARRY; 2010-02-06 to 2017-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Aggregates USA Holdings LLC → WATAUGA QUARRY; 2010-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregates USA Holdings LLC → Aggregates USA LLC; 2010-02-06 to 2017-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings LLC → WATAUGA QUARRY; 2017-12-29 to 2024-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries → WATAUGA 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 → WATAUGA 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 → WATAUGA QUARRY; 2024-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → WATAUGA 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