# Relationship history for MSHA mine 4104754

Current hierarchy: **Joe C  Ballenger → Val-Tex Asphalt & Environmental Inc. → Mobil Screen #1-6210**

- 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:** Joe C  Ballenger → Mobil Screen #1-6210; 1999-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Val-Tex Asphalt & Environmental Inc. → Mobil Screen #1-6210; 2008-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe C  Ballenger → Val-Tex Asphalt & Environmental Inc.; 2008-10-01 to current/open; source msha-controller-operator-history