# Relationship history for MSHA mine 4605985

Current hierarchy: **Kelley Paul W → P W K Development Inc → #1 Mine**

- 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:** Kelley Paul W → #1 Mine; 1976-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P W K Development Inc → #1 Mine; 1979-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelley Paul W → P W K Development Inc; 1979-04-01 to current/open; source msha-controller-operator-history