# Relationship history for MSHA mine 4202756

Current hierarchy: **Nathan  Janes; Keith  Gilbert → Southwest Grading and Paving LLC → Desert Mound**

- 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:** Southwest Grading and Paving LLC → Desert Mound; 2024-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nathan  Janes et al → Desert Mound; 2024-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nathan  Janes et al → Southwest Grading and Paving LLC; 2024-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Gilbert et al → Southwest Grading and Paving LLC; 2024-04-18 to current/open; source msha-controller-operator-history