# Relationship history for MSHA mine 0201483

Current hierarchy: **Vulcan Materials Company → Cal Mat Co → Ina Pit**

- 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:** Columbia Sand & Gravel Company Inc → Ina Pit; 1950-01-01 to 1983-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Columbia Consolidated Corp → Ina Pit; 1950-01-01 to 1983-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Columbia Consolidated Corp → Columbia Sand & Gravel Company Inc; 1950-01-01 to 1983-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Roland  May → Ina Pit; 1982-12-07 to 1986-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Columbia Materials → Ina Pit; 1983-01-07 to 1986-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Roland  May → Columbia Materials; 1983-01-07 to 1986-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Blue Circle Industries Plc → Ina Pit; 1984-05-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Circle West → Ina Pit; 1986-01-16 to 1989-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Blue Circle Industries Plc → Blue Circle West; 1986-01-16 to 1989-07-31; source msha-controller-operator-history
- **operator_operates_mine:** B C W Inc → Ina Pit; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Empresas Tolteca → Ina Pit; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Empresas Tolteca → B C W Inc; 1989-08-01 to 1990-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials, Inc. → Ina Pit; 1990-10-01 to 2003-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Ina Pit; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials, Inc.; 1990-10-01 to 2003-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Ina Pit; 1999-01-06 to 2007-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Ina Pit; 2001-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Ina Pit; 2002-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → Ina Pit; 2003-08-12 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2003-08-12 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Ina Pit; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Staker & Parson Co. → Ina Pit; 2008-01-01 to 2015-05-04; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Staker & Parson Co.; 2008-01-01 to 2015-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Cal Mat Co → Ina Pit; 2015-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Cal Mat Co; 2015-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Cal Mat Co; 2015-05-05 to 2007-11-15; source msha-controller-operator-history