# Relationship history for MSHA mine 4801720

Current hierarchy: **Jay Dee  Hacklin → Quality Agg & Construction Inc → QAC #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:** Quality Agg & Construction Inc → QAC #1; 2007-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jay Dee  Hacklin → QAC #1; 2007-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay Dee  Hacklin → Quality Agg & Construction Inc; 2007-08-20 to current/open; source msha-controller-operator-history