Lines in the City range from 4 inches to 48 inches in size. There are three types of transportation lines in the sewer collection system:
Force mains - lines under pressure from a pump
Gravity mains - lines that transmit waste stream by gravity or down hill
Laterals - lines that connect homes or businesses to the mains
Staff also maintains two river crossings (pipe bridges), which are the large lines at the North and South ends of town crossing the Salinas River.
Staff's goal is to clean the entire collection system every three years. Each month staff cleans HMAs (high maintenance areas). These are problem areas do to excessive grease build up, flat lines, or roots clogging the lines, most are in the west side or the older sections of town.