# Relationship history for MSHA mine 0300136

Current hierarchy: **Arcosa, Inc → TRN LW BR, LLC. → Proctor Plant # 1670**

- 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:** Arkansas Lightweight Aggregate Corp → Proctor Plant # 1670; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_mine:** General Shale Products Corp → Proctor Plant # 1670; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** General Shale Products Corp → Arkansas Lightweight Aggregate Corp; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Products Corp → Proctor Plant # 1670; 1986-06-30 to 2001-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Marley Plc → Proctor Plant # 1670; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marley Plc → General Shale Products Corp; 1986-06-30 to 2001-10-16; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Proctor Plant # 1670; 1987-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arkalite Division of General Shale LLC → Proctor Plant # 1670; 2001-10-17 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Proctor Plant # 1670; 2001-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → Arkalite Division of General Shale LLC; 2001-10-17 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Wienerberger AG → Proctor Plant # 1670; 2002-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** General Shale Brick, Inc. → Proctor Plant # 1670; 2004-07-01 to 2005-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Wienerberger AG → General Shale Brick, Inc.; 2004-07-01 to 2005-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Big River Industries Incorporated → Proctor Plant # 1670; 2005-11-19 to 2015-03-19; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Big River Industries Incorporated; 2005-11-19 to 2015-03-19; source msha-controller-operator-history
- **operator_operates_mine:** TRN LW BR, LLC. → Proctor Plant # 1670; 2015-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Proctor Plant # 1670; 2015-03-20 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → TRN LW BR, LLC.; 2015-03-20 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Proctor Plant # 1670; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → TRN LW BR, LLC.; 2018-11-01 to current/open; source msha-controller-operator-history