# Relationship history for MSHA mine 4801749

Current hierarchy: **Randell D  Archer → Archer Construction, Inc → Doyle #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

- **controller_controls_mine:** Randell D  Archer → Doyle #1; 2010-07-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Archer Construction, Inc → Doyle #1; 2010-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randell D  Archer → Archer Construction, Inc; 2010-08-18 to current/open; source msha-controller-operator-history