# Relationship history for MSHA mine 3901651

Current hierarchy: **Ethan  Beld → LL & Sons Excavating, Inc. → Oxford 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:** LL & Sons Excavating, Inc. → Oxford Pit; 2020-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Loren  Beld → Oxford Pit; 2020-07-07 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Loren  Beld → LL & Sons Excavating, Inc.; 2020-07-07 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ethan  Beld → LL & Sons Excavating, Inc.; 2020-07-07 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Lucy  Beld → LL & Sons Excavating, Inc.; 2020-07-07 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ethan  Beld → Oxford Pit; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ethan  Beld → LL & Sons Excavating, Inc.; 2025-01-01 to current/open; source msha-controller-operator-history