# Relationship history for MSHA mine 3606458

Current hierarchy: **Lispi Eugene-Raymond Giza → Giza & Oley Enterprises → Preston Branch Railroad Bed**

- 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

- **controller_controls_mine:** Lispi Eugene-Raymond Giza Et Al → Preston Branch Railroad Bed; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Giza & Oley Enterprises → Preston Branch Railroad Bed; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lispi Eugene-Raymond Giza Et Al → Giza & Oley Enterprises; 1977-07-01 to current/open; source msha-controller-operator-history