# Relationship history for MSHA mine 4100078

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials, Inc. → New Braunfels Plant**

- 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:** Apg Lime Corp → New Braunfels Plant; 1950-01-01 to 1988-02-23; source msha-controller-operator-history
- **controller_controls_mine:** USG Corporation → New Braunfels Plant; 1950-01-01 to 1988-02-23; source msha-controller-operator-history
- **controller_controls_operator:** USG Corporation → Apg Lime Corp; 1950-01-01 to 1988-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → New Braunfels Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chemical Lime Company → New Braunfels Plant; 1950-01-01 to 1998-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Apg Lime Corp → New Braunfels Plant; 1988-02-24 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_mine:** A P Green Industries Inc → New Braunfels Plant; 1988-02-24 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_operator:** A P Green Industries Inc → Apg Lime Corp; 1988-02-24 to 1998-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Apg Lime Corp → New Braunfels Plant; 1998-07-01 to 1999-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Global Industrial Technologies Inc → New Braunfels Plant; 1998-07-01 to 1999-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Global Industrial Technologies Inc → Apg Lime Corp; 1998-07-01 to 1999-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Lhoist Group → New Braunfels Plant; 1998-12-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chemical Lime New Braunfels Ltd → New Braunfels Plant; 1999-04-13 to 2007-11-25; source msha-controller-operator-history
- **controller_controls_mine:** Lhoist Group → New Braunfels Plant; 1999-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lhoist Group → Chemical Lime New Braunfels Ltd; 1999-04-13 to 2007-11-25; source msha-controller-operator-history
- **operator_operates_mine:** Lhoist North America of Texas, LLC → New Braunfels Plant; 2007-11-26 to 2026-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Lhoist Group → Lhoist North America of Texas, LLC; 2007-11-26 to 2026-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Chemical Lime Company → Lhoist North America of Texas, LLC; 2007-11-26 to 1998-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → New Braunfels Plant; 2026-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2026-10-01 to current/open; source msha-controller-operator-history