# Relationship history for MSHA mine 1518214

Current hierarchy: **H Stephen  Huey; Gary  Lovins → H & L Mining Inc → Rocky Branch**

- 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:** H & L Mining Inc → Rocky Branch; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Lovins  et al → Rocky Branch; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Lovins  et al → H & L Mining Inc; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** H Stephen  Huey  et al → H & L Mining Inc; 1999-10-01 to current/open; source msha-controller-operator-history