# Relationship history for MSHA mine 1701056

Current hierarchy: **Kenneth J  Dugas → KJ Dugas Construction Inc. → Spyder 516T**

- 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:** Kenneth J  Dugas → Spyder 516T; 1998-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** KJ Dugas Construction Inc. → Spyder 516T; 2022-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth J  Dugas → KJ Dugas Construction Inc.; 2022-01-07 to current/open; source msha-controller-operator-history