# Relationship history for MSHA mine 2003487

Current hierarchy: **Peter  O'Dovero → ASSOCIATED CONSTRUCTORS, LLC. → PORTABLE PLANT #2 NORDBERG**

- 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:** Associated Constructors LLC → PORTABLE PLANT #2 NORDBERG; 2014-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter  O'Dovero → PORTABLE PLANT #2 NORDBERG; 2014-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  O'Dovero → Associated Constructors LLC; 2014-04-25 to current/open; source msha-controller-operator-history