# Relationship history for MSHA mine 2002241

Current hierarchy: **Great Lakes Aggregates LLC → Sora Limestone, Inc. → Sora Limestone, 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:** Rockwood Stone Inc → Sora Limestone, Inc.; 1950-01-01 to 1993-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Daniel W  Holloway → Sora Limestone, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel W  Holloway → Rockwood Stone Inc; 1950-01-01 to 1993-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Sora Limestone, Inc. → Sora Limestone, Inc.; 1993-06-21 to 2004-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Angelo E  Iafrate  et al → Sora Limestone, Inc.; 1993-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angelo E  Iafrate  et al → Sora Limestone, Inc.; 1993-06-21 to 2004-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Sora Limestone, Inc. → Sora Limestone, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Great Lakes Aggregates LLC → Sora Limestone, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great Lakes Aggregates LLC → Sora Limestone, Inc.; 2004-01-22 to current/open; source msha-controller-operator-history