# Relationship history for MSHA mine 3608419

Current hierarchy: **East SM, LLC → Summit Anthracite Inc → ARCHBALD MTN STRIP #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Vincent  Kassa → ARCHBALD MTN STRIP #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Rothermel et al → ARCHBALD MTN STRIP #1; 1989-05-17 to 2020-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Silverbrook Anthracite Inc → ARCHBALD MTN STRIP #1; 1993-06-01 to 2021-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Kassa → Silverbrook Anthracite Inc; 1993-06-01 to 2021-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Stavola Holdings Pennsylvania LLC → ARCHBALD MTN STRIP #1; 2020-10-15 to 2024-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Summit Anthracite Inc → ARCHBALD MTN STRIP #1; 2021-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stavola Holdings Pennsylvania LLC → Summit Anthracite Inc; 2021-09-01 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Rothermel et al → Summit Anthracite Inc; 2021-09-01 to 2020-10-14; source msha-controller-operator-history
- **controller_controls_operator:** John  Scheib et al → Summit Anthracite Inc; 2021-09-01 to 2020-10-14; source msha-controller-operator-history
- **controller_controls_mine:** East SM, LLC → ARCHBALD MTN STRIP #1; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** East SM, LLC → Summit Anthracite Inc; 2024-10-01 to current/open; source msha-controller-operator-history