# Relationship history for MSHA mine 0403871

Current hierarchy: **Chandler Mayhew LLC; Mayhew Land Co LLC → MAMR LLC DBA Maitri Road Recycling → Mayhew 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:** C L Pharris Sand & Gravel Inc → Mayhew Plant; 1950-01-01 to 1992-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W Pharris → Mayhew Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W Pharris → C L Pharris Sand & Gravel Inc; 1950-01-01 to 1992-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Mayhew Plant; 1990-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex USA Construction Materials Inc → Mayhew Plant; 1992-01-18 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex USA Construction Materials Inc; 1992-01-18 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Mayhew Plant; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → Mayhew Plant; 2002-01-01 to 2009-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2002-01-01 to 2009-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Mayhew Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials Pacific LLC → Mayhew Plant; 2009-08-20 to 2012-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials Pacific LLC; 2009-08-20 to 2012-06-30; source msha-controller-operator-history
- **operator_operates_mine:** MAMR LLC DBA Maitri Road Recycling → Mayhew Plant; 2012-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Broyles et al → Mayhew Plant; 2012-07-01 to 2024-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Broyles et al → MAMR LLC DBA Maitri Road Recycling; 2012-07-01 to 2024-09-16; source msha-controller-operator-history
- **controller_controls_operator:** John  Robertson et al → MAMR LLC DBA Maitri Road Recycling; 2012-07-01 to 2024-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Chandler Mayhew LLC et al → Mayhew Plant; 2024-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chandler Mayhew LLC et al → MAMR LLC DBA Maitri Road Recycling; 2024-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mayhew Land Co LLC et al → MAMR LLC DBA Maitri Road Recycling; 2024-09-17 to current/open; source msha-controller-operator-history