Featured Civil Engineering Case Study
Duval County Courthouse | Civil & Roadway Design | Jacksonville, FL
CSI served as a key design-build team member for the 800,000 SF Duval County Courthouse in downtown Jacksonville, Florida — one of the most complex civic infrastructure projects in the region.
CSI's scope included civil site design, roadway design, and stormwater drainage, highlighted by the full realignment of Monroe Street to accommodate the courthouse entrance. Utility design encompassed potable water distribution and sanitary sewer collection systems, with permitting coordinated across multiple agencies including the City of Jacksonville, Jacksonville Electric Authority (JEA), and the Environmental Protection Agency (EPA).
A core engineering challenge was maximizing the use of existing in-place structures to minimize costs — requiring extensive coordination across all design disciplines throughout the project lifecycle.
Project Details
Client: KBJ Architects, Inc.
Location: Jacksonville, FL
Services: Civil Engineering Design | Roadway Design | Permitting | Construction Administration
Project Engineer: Ali Najafi, PE
Arlington Middle School | Civil Site Design | Jacksonville, FL
CSI provided full civil engineering design services for the new 163,000 SF Arlington Middle School, replacing the existing facility for the Duval County School Board in Jacksonville, Florida.
Scope included site and utility layout, stormwater management facility design, potable water and sanitary sewer systems, and a new pump station — all permitted through the St. Johns River Water Management District (SJRWMD), Jacksonville Electric Authority (JEA), the City of Jacksonville Regulatory and Environmental Services Department, and the Florida Department of Environmental Protection (FDEP).
A critical technical challenge was the hydrologic analysis of the approximately 30-acre drainage basin using the adICPR model, ensuring compliant stormwater design for the SJRWMD. The project also required precise coordination with the adjacent Lone Star Road Improvements contractor to align construction sequencing and protect project timelines.
Key Engineering Work:
Hydrologic watershed analysis (adICPR model)
Stormwater management facility design
Potable water, fire suppression, and sanitary sewer system design
Pump station design and permitting
Erosion & sediment control planning
SJRWMD permit application preparation
Project Details
Client: Duval County School Board
Location: Jacksonville, FL
Services: Civil Engineering Design | Permitting | Geotechnical Engineering | Construction Administration
Project Engineer: Ali Najafi, PE
Florida State College at Jacksonville (FSCJ) | Civil Site Design | Jacksonville, FL
CSI provided civil engineering design and permitting services for an expansion of the North Campus Child Care facility at Florida State College at Jacksonville (formerly FCCJ), including full stormwater management facility design permitted through the St. Johns River Water Management District.
The primary engineering challenge centered on achieving compliant stormwater drainage within the constraints of the existing drainage basin — addressed through hydrologic analysis using the adICPR model and a coordinated permitting strategy.
Key Engineering Work:
Hydrologic watershed analysis (adICPR model)
Stormwater management facility design
Erosion & sediment control planning
SJRWMD permit application preparation and approval
Cost control coordination with project architects and construction team
Project Details
Client: Smith-McCrary Architects
Location: Jacksonville, FL
Services: Civil Engineering Design | Permitting | Construction Administration
Project Engineers: Ali Najafi, PE | Christopher Morse, PE
Jacksonville International Airport Parking Facility | Civil Site & Hydraulic Design | Jacksonville, FL
CSI designed a 1,271-space paved parking facility for the Jacksonville Port Authority at Jacksonville International Airport (JIA) — a project requiring innovative stormwater engineering to meet strict FAA regulations prohibiting standing water near runways.
CSI's solution was the design of a custom underground exfiltration system capable of managing a 25-year, 24-hour storm event with a 72-hour water recovery time — eliminating the need for surface retention ponds while maintaining full regulatory compliance.
Key Engineering Work:
Underground exfiltration stormwater system design
Hydrologic analysis using HEC-1 model
Stormwater attenuation pond design
Box culvert hydraulic modeling (HEC-2)
Natural channel outfall hydraulic modeling (HEC-2)
Drainage conveyance system design
Erosion & sediment control planning
SJRWMD permit application preparation
Project Details
Client: Jacksonville Port Authority
Location: Jacksonville, FL
Services: Civil Site Design | Hydraulic Investigation & Modeling | Permitting
Project Engineer: Ali Najafi, PE
South Florida Water Management District | Civil & Structural Engineering | Statewide, FL
In 2004, CSI was awarded a three-year general engineering services contract with the South Florida Water Management District (SFWMD) — delivering a broad range of civil and structural engineering services across multiple task assignments throughout Florida.
Task 1 – Pump Station S-6 Trash Rake Design: CSI designed an automatic trash rack and rake system upstream of Pump Station S-6 on the Hillsboro Canal, mounted on a new service bridge for automated debris removal and disposal.
Task 2 – Field Station Master Plan Study: CSI evaluated existing and future facility needs across SFWMD service areas, developed conceptual site plans, and produced a comprehensive master site plan report to guide future construction procurement.
Task 3 – PC15-C18 Project Culvert Replacement (Palm Beach County): CSI managed the demolition and replacement of a deteriorated project culvert on the C-18 Canal with dual concrete box culverts, including a control building, telemetry, slide gates, and full site restoration — bank reshaping, rock rip-rap, and re-grassing.
Task 4 – Canal Maintenance Plans: CSI developed maintenance plans and specifications for sediment removal in SFWMD canals immediately upstream of Stormwater Treatment Area (STA) inflow structures.
Project Details
Client: South Florida Water Management District (SFWMD)
Location: Statewide, Florida
Services: Civil Engineering Design | Structural Engineering | Master Planning | Hydraulic Design
Project Engineers: Ali Najafi, PE | Christopher Morse, PE
