# Relationship history for MSHA mine 4801769

Current hierarchy: **Jay Dee  Hacklin → Quality Agg & Construction, Inc → QAC #4**

- 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:** Jay Dee  Hacklin → QAC #4; 2007-08-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quality Agg & Construction, Inc → QAC #4; 2013-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay Dee  Hacklin → Quality Agg & Construction, Inc; 2013-02-13 to current/open; source msha-controller-operator-history