# Relationship history for MSHA mine 3800613

Current hierarchy: **CSR Ltd → Southern Aggregates Company → Myrtle Beach Quarry**

- 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:** CSR Ltd → Myrtle Beach Quarry; 1982-10-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G & W Construction & Mining Inc → Myrtle Beach Quarry; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Gore Roy & Terry Wright → Myrtle Beach Quarry; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Gore Roy & Terry Wright → G & W Construction & Mining Inc; 1986-05-01 to 1987-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Atlantic Coast Materials Inc → Myrtle Beach Quarry; 1987-01-21 to 1989-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Art  Cates et al → Myrtle Beach Quarry; 1987-01-21 to 1989-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Art  Cates et al → Atlantic Coast Materials Inc; 1987-01-21 to 1989-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Southern Aggregates Company → Myrtle Beach Quarry; 1989-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Southern Aggregates Company; 1989-04-14 to current/open; source msha-controller-operator-history