# Relationship history for MSHA mine 0901023

Current hierarchy: **Construction Partners Inc → The Scruggs Company → Riverbend Sand**

- 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:** F Ferrell  Scruggs Jr → Riverbend Sand; 1950-01-01 to 2018-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Riverbend Sand Company → Riverbend Sand; 1988-06-01 to 2017-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Raymond R  Lee et al → Riverbend Sand; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond R  Lee et al → Riverbend Sand Company; 1988-06-01 to 2017-04-17; source msha-controller-operator-history
- **controller_controls_operator:** William C  Lee Jr et al → Riverbend Sand Company; 1988-06-01 to 2017-04-17; source msha-controller-operator-history
- **operator_operates_mine:** The Scruggs Company → Riverbend Sand; 2017-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** F Ferrell  Scruggs Jr → The Scruggs Company; 2017-04-18 to 2018-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Construction Partners Inc → Riverbend Sand; 2018-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Construction Partners Inc → The Scruggs Company; 2018-05-15 to current/open; source msha-controller-operator-history