# Relationship history for MSHA mine 3604080

Current hierarchy: **Glasgow Inc → Barletta Materials & Construction Inc → Barletta Materials & Construction Inc**

- 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:** A Barletta & Sons → Barletta Materials & Construction Inc; 1950-01-01 to 1992-12-11; source msha-controller-operator-history
- **controller_controls_mine:** James  Barletta  et al → Barletta Materials & Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Barletta  et al → A Barletta & Sons; 1950-01-01 to 1992-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Rocco  Barletta  et al → A Barletta & Sons; 1950-01-01 to 1992-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Barletta  et al → A Barletta & Sons; 1950-01-01 to 1992-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Barletta Materials & Construction Inc → Barletta Materials & Construction Inc; 1992-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glasgow Inc → Barletta Materials & Construction Inc; 1992-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glasgow Inc → Barletta Materials & Construction Inc; 1992-12-12 to current/open; source msha-controller-operator-history