# Relationship history for MSHA mine 1518424

Current hierarchy: **TTI Technologies Inc → TTI Synfuel, Inc. → #2 Riverway Terminals**

- 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

- **controller_controls_mine:** TTI Technologies Inc → #2 Riverway Terminals; 2000-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TTI Synfuel, Inc. → #2 Riverway Terminals; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TTI Technologies Inc → TTI Synfuel, Inc.; 2001-08-01 to current/open; source msha-controller-operator-history