# Relationship history for MSHA mine 1516082

Current hierarchy: **Hayes Randall A → Hayes Inc → Weeksbury No 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:** Hayes Randall A Et Al → Weeksbury No 1; 1979-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Top Inc → Weeksbury No 1; 1987-06-01 to 1988-03-29; source msha-controller-operator-history
- **controller_controls_mine:** Raschella Alfred W → Weeksbury No 1; 1987-06-01 to 1988-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Raschella Alfred W → Big Top Inc; 1987-06-01 to 1988-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Big Top Inc → Weeksbury No 1; 1988-03-30 to 1990-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Collins Victor → Weeksbury No 1; 1988-03-30 to 1990-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Collins Victor → Big Top Inc; 1988-03-30 to 1990-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Hayes Inc → Weeksbury No 1; 1990-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hayes Randall A Et Al → Hayes Inc; 1990-08-22 to current/open; source msha-controller-operator-history