# Relationship history for MSHA mine 4503187

Current hierarchy: **David  Grainger → Aggregates West Inc → LUMMI ISLAND 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:** Al  Jansen → LUMMI ISLAND QUARRY; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jose A  Rivera Jr → LUMMI ISLAND QUARRY; 1985-07-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jij Construction Company Inc → LUMMI ISLAND QUARRY; 1989-03-01 to 1991-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Al  Jansen → Jij Construction Company Inc; 1989-03-01 to 1991-01-23; source msha-controller-operator-history
- **controller_controls_mine:** David  Grainger → LUMMI ISLAND QUARRY; 1989-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rivera & Green Inc → LUMMI ISLAND QUARRY; 1991-01-24 to 1991-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Jose A  Rivera Jr → Rivera & Green Inc; 1991-01-24 to 1991-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Ace Rock LLC → LUMMI ISLAND QUARRY; 1991-08-23 to 2004-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James W  Bride Jr  et al → LUMMI ISLAND QUARRY; 1991-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James W  Bride Jr  et al → Ace Rock LLC; 1991-08-23 to 2004-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Aggregates West Inc → LUMMI ISLAND QUARRY; 2004-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Grainger → Aggregates West Inc; 2004-07-01 to current/open; source msha-controller-operator-history