Public Works
The Public Works Department consists of the following divisions: Administration, Engineering, Erosion Control, and Road and Bridge.
Administration
Public Works Administration provides support to the various Public Works Divisions and to the general public.
Engineering 
The Engineering Division proposes, designs and implements projects in stormwater management, transportation system enhancements and infrastructure maintenance. The Engineering Division implements the Stormwater Management Program and the Municipal Service Benefit Unit Program (MSBU).
Erosion District
The St. Lucie County Erosion District was created in 1967 by a special act of the Florida Legislature with the intent and purpose to provide a means to manage beach erosion problems in St. Lucie County. The Public Works Department - Erosion District provides information, analysis, and staff support sufficient for the County Administrator and the Erosion District Board to make well-informed decisions. The Erosion District is dedicated to providing technical expertise and sound engineering judgment in evaluating beach erosion and inlet management issues. The District is primarily responsible for planning and coordinating beach, environmental and coastal issues with local, state and federal agencies. Additional duties include management of the artificial reef program. The District is also responsible for preparation of a fiscal budget, project administration and management, overseeing consultant contracts, and seeking funding assistance.
Road & Bridge
The Road and Bridge Division has three Operating Sections - Drainage, Maintenance and Traffic. They are responsible for providing maintenance and reconstructing of County drainage facilities, roadways, traffic signs and signals and the heavy equipment service garage. Combined, they have 51 employees and 17 contract labor employees.
The Drainage Section, consisting of 12 employees and 5 contract labor employees, is responsible for the mechanical cleaning of 1,100 plus miles of roadway ditches/swales and 50 plus miles of primary drainways/canals. This includes the installation of culverts and similar drainage structures.
The Maintenance Section consisting of 33 employees and 10 contract labor employees, is responsible for maintaining 376 miles of paved roadways, 97 miles of rock/dirt roadways, 38 miles of chip-sealed roadways and 29 miles of asphalt milled roadways. Road maintenance includes right-of-way mowing, surface patching, shoulder repair, and grading of dirt roads. This unit is also responsible for managing the roadway resurfacing program for the County. The heavy equipment service garage has 1 full time mechanic.
The Traffic Section consisting of 6 employees and 2 contract employees, is responsible for the design approval, operation, maintenance, and repair of existing traffic signals, overhead flashers; the fabrication of regulation, warning, guide signs and street signs and all county required specialty signs; the application annually of roadway thermoplastic stripping and guardrail repairs; conducting traffic counts and traffic operation studies, as well as maintaining the County’s accident data base and Adopt-A-Road Program.