ALPHARETTA, GA — You may notice a big balloon up over Alpharetta on Friday.

A developer is planning to float a giant balloon to show the height of a proposed building on Main Street and Marietta Street.

The balloon is expected to go up Friday between 8 a.m. and 11 a.m.

A city council hearing on the proposed mixed-use development is set for Monday, October 27 at 6:30 p.m. at City Hall.