# Relationship history for MSHA mine 3900469

Current hierarchy: **Kenneth D  Jensen; Kyle D  Jensen → Jensen Rock & Sand Inc → WAUBAY 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:** Jensen Rock & Sand Inc → WAUBAY PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kyle D  Jensen et al → WAUBAY PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle D  Jensen et al → Jensen Rock & Sand Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth D  Jensen et al → Jensen Rock & Sand Inc; 1950-01-01 to current/open; source msha-controller-operator-history