Adding a dining hall, a storm shelter, and renovating an existing classroom wing simultaneously on an active K-12 campus creates the kind of sequencing and coordination pressure where clashes found in the field cost far more than clashes found in a model. G&W provided plumbing BIM coordination for the MICDS Lower School project at Mary Institute Country Day School, coordinating systems across all building disciplines to produce an installation-ready model and annotated field drawings before work began.