More By allowing ads to appear on this site, you support the local businesses who, in turn, support great journalism. MANTECA GROWTH MAY ADD 2,000 STUDENTS TO RIPON USD SE Manteca development: Big impacts on Ripon are likely This map shows the zoning for 1,049 acres in southeast Manteca that will have significant impacts on the Ripon community. Manteca’s plans for much of 1,049 acres in the extreme southeast area of the city will have big impacts on Ripon. That’s because zoning designations have the ability to generate 1,150 students from housing that would be built within the Ripon Unified School District. To put that in perspective, that is just over a third of the current 3,144 Ripon Unified students.