# Relationship history for MSHA mine 2700402

Current hierarchy: **Art C Conkey Jr. → Conkey Enterprises → Conkey's Bog Road 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:** Conkey Enterprises → Conkey's Bog Road Pit; 2005-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Art C Conkey Jr. → Conkey's Bog Road Pit; 2005-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Art C Conkey Jr. → Conkey Enterprises; 2005-04-18 to current/open; source msha-controller-operator-history