# Relationship history for MSHA mine 1500037

Current hierarchy: **Martin Marietta Materials Inc → Bluegrass Materials Company, LLC → Cumberland 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:** Haydon Holdings LLC → Cumberland Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hurricane Industries Inc → Cumberland Quarry; 1978-03-09 to 1980-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Hurricane Corp → Cumberland Quarry; 1978-03-09 to 1980-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Hurricane Corp → Hurricane Industries Inc; 1978-03-09 to 1980-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Nally & Haydon Cumberland, LLC → Cumberland Quarry; 1980-07-30 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Haydon Holdings LLC → Cumberland Quarry; 1980-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haydon Holdings LLC → Nally & Haydon Cumberland, LLC; 1980-07-30 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Cumberland Quarry; 2000-07-01 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Nally & Haydon, LLC → Cumberland Quarry; 2003-01-01 to 2006-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Haydon Holdings LLC → Nally & Haydon, LLC; 2003-01-01 to 2006-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Cumberland Quarry; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials South Central, Inc. → Cumberland Quarry; 2006-11-07 to 2008-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials South Central, Inc.; 2006-11-07 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials South Central, Inc.; 2006-11-07 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Cumberland 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 2008-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials Atlantic LLC → Cumberland Quarry; 2008-08-20 to 2010-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Cumberland Quarry; 2008-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials Atlantic LLC; 2008-08-20 to 2010-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Bluegrass Materials Company, LLC → Cumberland Quarry; 2010-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Panadero Aggregates Holdings, LLC → Cumberland Quarry; 2010-08-26 to 2018-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Panadero Aggregates Holdings, LLC → Bluegrass Materials Company, LLC; 2010-08-26 to 2018-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Cumberland Quarry; 2018-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Bluegrass Materials Company, LLC; 2018-04-27 to current/open; source msha-controller-operator-history