# Relationship history for MSHA mine 4103677

Current hierarchy: **Kevin  Lehne → Hill Country Stone → SUTHERLAND RANCH**

- 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:** Hill Country Stone → SUTHERLAND RANCH; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Lehne → SUTHERLAND RANCH; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Lehne → Hill Country Stone; 1991-05-01 to current/open; source msha-controller-operator-history