# Relationship history for MSHA mine 4103958

Current hierarchy: **Larry  Mann → Valley Aggregate → SHACKELFORD**

- 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:** Valley Aggregates → SHACKELFORD; 1997-07-01 to 1998-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie M  Shackelford et al → SHACKELFORD; 1997-07-01 to 1998-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie M  Shackelford et al → Valley Aggregates; 1997-07-01 to 1998-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Valley Aggregate → SHACKELFORD; 1998-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Mann → SHACKELFORD; 1998-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Mann → Valley Aggregate; 1998-02-03 to current/open; source msha-controller-operator-history