# Relationship history for MSHA mine 3604517

Current hierarchy: **Tedesco William → Tedesco Coal Company → Tedesco Strip**

- 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:** James  Filiaggi → Tedesco Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tedesco Coal Company → Tedesco Strip; 1972-01-01 to 1977-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Tedesco William → Tedesco Strip; 1972-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tedesco William → Tedesco Coal Company; 1972-01-01 to 1977-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Lawrence Coal Company → Tedesco Strip; 1977-05-05 to 1977-07-07; source msha-controller-operator-history
- **controller_controls_operator:** James  Filiaggi → Lawrence Coal Company; 1977-05-05 to 1977-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Tedesco Coal Company → Tedesco Strip; 1977-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tedesco William → Tedesco Coal Company; 1977-07-08 to current/open; source msha-controller-operator-history