# Relationship history for MSHA mine 3304280

Current hierarchy: **Rita  Alvis; James H  Alvis → Alvis Landscape & Golf Course Mtrls Inc → Petersburg**

- 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:** Alvis Landscape & Golf Course Mtrls Inc → Petersburg; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Alvis  et al → Petersburg; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Alvis  et al → Alvis Landscape & Golf Course Mtrls Inc; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rita  Alvis  et al → Alvis Landscape & Golf Course Mtrls Inc; 1992-08-01 to current/open; source msha-controller-operator-history