# Relationship history for MSHA mine 3003891

Current hierarchy: **Jereme D  Lehmer → Preston Stone, LLC. → Sylstra 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

- **controller_controls_mine:** Jereme D  Lehmer → Sylstra Pit; 2013-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Preston Stone, LLC. → Sylstra Pit; 2014-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jereme D  Lehmer → Preston Stone, LLC.; 2014-06-02 to current/open; source msha-controller-operator-history