RIO GRANDE PRIM. Search for: Advanced Search Browse Schools Search Schools RIO GRANDE PRIM. Contact Information Contact The School Phone: 0216910341 More Information RIO GRANDE PRIM., PUBLIC, PRIMARY SCHOOL, PRIMARY SUBJECTS, Latitude, -33.9910779965304, Longitude, 18.5526216850162. BOARDING SCHOOL= FALSE This Ad has been viewed 99 times. Schools contact details.