Can Manteca afford to build an interchange at McKinley Avenue and the 120 Bypass?It’s the only bottom line that matters Tuesday when the Manteca City Council revisits whether to go forward with design work costing $1.5 million.A month ago the council unanimously voted to essentially send $2.8 million back to Uncle Sam. That money was secured in 2005 to cover the design work and right-of-way acquisition. Vince Hernandez led the charge to sidetrack the project after expressing reservations that the only reason the city was moving forward at this time was so they’d start spending the federal money to avoid having to return it next year to Washington, D.C.McKinley interchange is back before the council because Caltrans has made it clear making Yosemite Avenue a full-scale interchange is extremely problematic due to its proximity to the Interstate 5-120 Bypass interchange.