# Relationship history for MSHA mine 4703354

Current hierarchy: **Todd V  Tryggestad; Todd  Buckles → MT Rock INC. → Crusher #1**

- 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

- **operator_operates_mine:** MT Rock INC. → Crusher #1; 2003-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Buckles et al → Crusher #1; 2003-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Buckles et al → MT Rock INC.; 2003-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd V  Tryggestad et al → MT Rock INC.; 2003-06-10 to current/open; source msha-controller-operator-history