# Relationship history for MSHA mine 3503614

Current hierarchy: **Kevin L  Pardue; Steven  Pardue → Pardue Construction, LLC. → Hickey Pit**

- 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:** High Grade Contracting → Hickey Pit; 2005-03-29 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Kevin L  Pardue et al → Hickey Pit; 2005-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin L  Pardue et al → High Grade Contracting; 2005-03-29 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Pardue et al → High Grade Contracting; 2005-03-29 to 2011-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Pardue Construction, LLC. → Hickey Pit; 2011-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin L  Pardue et al → Hickey Pit; 2011-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin L  Pardue et al → Pardue Construction, LLC.; 2011-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Pardue et al → Pardue Construction, LLC.; 2011-08-01 to current/open; source msha-controller-operator-history