# Relationship history for MSHA mine 4406495

Current hierarchy: **Lassiter John S → S & K Equipment Leasing Inc → Bronco 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:** S & K Equipment Leasing Inc → Bronco Pit; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lassiter John S → Bronco Pit; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lassiter John S → S & K Equipment Leasing Inc; 1989-01-01 to current/open; source msha-controller-operator-history