Construction is a division of the Streets Department and is funded by the Sales Tax Re-allocation. Along with the Water Department, the division works to provide quality water to the residents of Siloam Springs. 

Over time, water lines wear out from constant freezing and thawing in the winter months which can cause ground movement and can ruptures the water lines. Construction works to prevent this kind of situation from happening. It also installs new water and sewer lines and assists the Street Department with road reconstruction.

Construction strives to provide safe and improved street and road conditions through a process known as Mill and Overlay. This is a technique that removes the top layer of the street using a milling machine to grind the pavement and then paves a new layer in its place.