# Relationship history for MSHA mine 3608406

Current hierarchy: **Vincent  Kassa → Silverbrook Anthracite Inc. → Coalbrook Stripping #1**

- 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:** Vincent  Kassa → Coalbrook Stripping #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maco Associates Inc → Coalbrook Stripping #1; 1993-04-01 to 2023-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Louis  DeNaples Jr et al → Coalbrook Stripping #1; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis  DeNaples Jr et al → Maco Associates Inc; 1993-04-01 to 2023-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Dominic  DeNaples et al → Maco Associates Inc; 1993-04-01 to 2023-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Silverbrook Anthracite Inc. → Coalbrook Stripping #1; 2023-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Kassa → Silverbrook Anthracite Inc.; 2023-01-03 to current/open; source msha-controller-operator-history