# Relationship history for MSHA mine 1100026

Current hierarchy: **T & T Oil Company Inc; Shakespeare Oil Company Inc → Shawnee Stone LLC → CYPRESS 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → CYPRESS PLANT; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Columbia Quarry Company → CYPRESS PLANT; 1950-01-01 to 1998-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Clyde D  Trexler → CYPRESS PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clyde D  Trexler → Columbia Quarry Company; 1950-01-01 to 1998-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, L.P. → CYPRESS PLANT; 1998-05-26 to 2007-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, L.P.; 1998-05-26 to 2007-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Shawnee Stone LLC → CYPRESS PLANT; 2007-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shakespeare Oil Company Inc et al → CYPRESS PLANT; 2007-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shakespeare Oil Company Inc et al → Shawnee Stone LLC; 2007-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** T & T Oil Company Inc et al → Shawnee Stone LLC; 2007-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → CYPRESS PLANT; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, L.P.; 2007-11-16 to 2007-05-04; source msha-controller-operator-history