Screening is the process of removing large material from the wastewater as it enters the beginning of the wastewater treatment process. When wastewater arrives at the treatment plant, it contains a large amount of debris that gets washed off the streets and into catch basins during rainstorms. The mechanical bar-screen at the treatment facility removes this material which usually consists of rags, sticks, litter, leaves, and just about anything else that can find its way into a catch basin during a storm.
La Porte's screening system consists of two centenary bar-screens. This allows one to be used as a backup bar-screen if there is trouble with the primary bar-screen.