CONSTRUCTION UPDATE: Avenue 17 Grade Separation 📍 Madera County Workers recently completed the rebar and concrete placement for the deck of the structure. The east and west approaches are also taking shape as crews continue to backfill and place MSE wall panels. The four-span structure will serve as a new roadway for Madera County taking vehicular traffic and pedestrians over the future high-speed rail and existing BNSF railroad tracks. The Avenue 17 Grade Separation is just one of many grade s