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 four Operating Units - Maintenance, Traffic, Drainage and Stormwater - and is responsible for providing maintenance and reconstructing of County roadways and drainage facilities with 84 employees, plus 18 contract labor employees.
The Maintenance Section is responsible for maintaining 357 miles of paved roadways, 98 miles of rock/dirt roads, and 51 miles of asphalt milled roads. Road maintenance includes right-of-way mowing, surface patching, shoulder repair, and grading of dirt roads.
The Traffic Section is responsible for designing new signals; the maintenance, repair and operation of existing signals and flashers; the fabrication of regulation, warning and street signs; the installation of signs; the application annually of roadway thermoplastic stripping and marking of paved roadways; conducting traffic counts and traffic operation studies; maintaining the County's accident data base.
The Drainage Unit is responsible for the mechanical cleaning of 1,100 plus miles of roadway ditches/swales and 50 plus miles of primary drainways/canals. The unit includes two small construction crews utilized for MSBU related roadway/drainage construction, as well as drop inlet, culvert, and similar drainage construction projects. This section manages the roadway resurfacing program and the Driveway Permit Inspections for the County.