# Relationship history for MSHA mine 0801119

Current hierarchy: **Gillman Ronald C → Upper Keys Marine Construction Inc → BLUE WATERS 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:** Gillman Ronald C Et Al → BLUE WATERS QUARRY; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Upper Keys Marine Construction Inc → BLUE WATERS QUARRY; 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gillman Ronald C Et Al → Upper Keys Marine Construction Inc; 1988-12-01 to current/open; source msha-controller-operator-history