# Relationship history for MSHA mine 1601524

Current hierarchy: **Lewis Energy Group LP → Lewis Resource Management, LLC → Falcon Frac**

- 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:** Lewis Resource Management, LLC → Falcon Frac; 2012-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Energy Group LP → Falcon Frac; 2012-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Energy Group LP → Lewis Resource Management, LLC; 2012-04-04 to current/open; source msha-controller-operator-history