# Relationship history for MSHA mine 2003213

Current hierarchy: **Edward C  Levy Jr → Delta Sand and Gravel → Delta Sand and Gravel, 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Holloway Co → Delta Sand and Gravel, Inc.; 2001-06-01 to 2017-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Scott R  Holloway → Delta Sand and Gravel, Inc.; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott R  Holloway → Holloway Co; 2001-06-01 to 2017-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Delta Sand and Gravel, Inc. → Delta Sand and Gravel, Inc.; 2017-05-01 to 2020-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Don O  Roberts → Delta Sand and Gravel, Inc.; 2017-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don O  Roberts → Delta Sand and Gravel, Inc.; 2017-05-01 to 2020-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Delta Sand and Gravel → Delta Sand and Gravel, Inc.; 2020-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward C  Levy Jr et al → Delta Sand and Gravel, Inc.; 2020-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward C  Levy Jr et al → Delta Sand and Gravel; 2020-06-22 to current/open; source msha-controller-operator-history