# Relationship history for MSHA mine 3003321

Current hierarchy: **James  Zeller → Snyder Construction Company → SNYDER CONSTRUCTION, 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James  Zeller → SNYDER CONSTRUCTION, INC.; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Snyder Construction Company → SNYDER CONSTRUCTION, INC.; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Zeller → Snyder Construction Company; 2000-04-01 to current/open; source msha-controller-operator-history