# Relationship history for MSHA mine 4104121

Current hierarchy: **Michael  Laine → Central Texas Sitework Inc → CENTRAL TEXAS SITEWORK, INC.**

- 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

- **operator_operates_mine:** Central Texas Sitework Inc → CENTRAL TEXAS SITEWORK, INC.; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Laine → CENTRAL TEXAS SITEWORK, INC.; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Laine → Central Texas Sitework Inc; 2000-01-01 to current/open; source msha-controller-operator-history