©2019 by DeLoach Engineering Science


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DES provides professional engineering and technical services in the water resources field, with clients in the public and private sectors throughout Florida and the Southeast, including public works and engineering departments of state and local government agencies, water supply utilities, stormwater utilities, state water management districts, private industry, and agriculture.

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Our firm's foundation is in the scientific fields of hydrology, hydrogeology and water-related aspects of ecology. We provide professional civil and environmental engineering services including: evaluation, planning, design, permitting and construction oversight. We also offer services in associated technical areas, such as: monitoring, inspection, reporting, cost estimating, inventory & asset management, and Geographic Information Systems (GIS).


As stormwater management has evolved into a more complex science, DES has developed data collection, modeling, analysis, planning and monitoring services, as well as, permitting services, to assist stormwater managers in their efforts to design, construct and operate stormwater facilities. Some typical stormwater management services that we provide include:

​• Stormwater Modeling and Analysis

• Stormwater Management Master Planning

• Pollutant Loading Analysis

• Best Management Practices (BMP) Evaluations

• Erosion Control Planning and Design

• Retention and Detention Pond Design

• Seepage Evaluations for Pond Systems

• Flow, Stage and Water Quality Monitoring

• Local, State and Federal Stormwater Permitting

• NPDES Monitoring and Reporting

• Construction Specifications and Inspection


Many federal, state and local agencies have adopted a watershed-based approach to water resource management. In response, DES has developed a range of services to assist our public and private sector clients to achieve their various goals (flood control, environmental restoration, water supply, water quality, permitting, etc.) while meeting the challenge of protecting our valuable water resources. Some typical watershed management services that we provide include:

​• Watershed Modeling and Analysis

• Multi-objective Watershed Planning

• Watershed-specific Management Criteria

• Statistical Analysis of Historical Data

• Water Quality Assessments

• Pollutant Load Reduction and Prevention

• Lake and Wetland Hydroperiod Evaluations

• Low-flow & Intermittent Stream Determinations

• Floodplain Studies and Damage Assessments

• Flood Forecasting and Evacuation Plans

• Flood Mitigation Plans

• Dam Break Evaluation and Contingency Plans

• Reservoir Siting and Safe Yield Evaluations



DeLoach Engineering Science was formed in February 2013 to serve clients in the public and private sectors, including, water management districts, government agencies, water supply and stormwater utilities, industry, and agriculture.  We also collaborate with firms seeking complementary, specialized services that we provide.


Our focus on current, local water resources issues, combined with a quarter century of experience and dedication to our craft, provides us with advantages over national and international consulting firms offering similar services.


Our senior staff members have a long history of successful service to our clients, a thorough understanding of current and evolving client needs, and great familiarity with important issues and emerging trends in the industry.

In important skill areas, our technical capabilities are head and shoulders above our competitors and, as a smaller and more nimble firm, we respond to client needs to a degree that cannot be matched by many larger firms.

As a well-conceived and effectively managed small business, with an excellent reputation, familiar client base and superior technical capabilities, we are positioned for success and growth in the Florida water resources market.



David DeLoach, PE

Mr. DeLoach has 26 years of experience in hydrology, hydrogeology, hydraulics, watershed management, water supply, water quality, mathematical modeling, data analysis, the application of Geographic Information Systems to water resource management, and stormwater management plan development.


Mr. DeLoach is responsible for technical content, project direction/management, and client satisfaction for water resources projects within the company. He oversees both surface water and groundwater projects related to watershed planning, flood mitigation, floodplain management, stormwater management, water supply, sustainability, environmental enhancement, permitting and water quantity and quality monitoring programs.

Trillian Baldassari, PE

Ms. Baldassari has 7 years of experience working on projects ranging from hydrologic and hydrodynamic modeling and dam break analyses to stormwater master plans and large scale watershed management programs throughout Florida.


Ms. Baldassari specializes in hydraulics, hydrology, mathematical modeling, data analysis, and the application of Geographic Information Systems (GIS) to water resource management.  She is responsible for managing and executing a variety of tasks, including: hydrologic and hydraulic model development, floodplain mapping, flood problem area identification, and GIS development and presentation.

Christopher Gilhooley

Mr. Gilhooley has 7 years of experience in Geographic Information Systems analysis and production with a strong focus on water resources and stormwater management engineering support.


Mr. Gilhooley has performed a variety of tasks on water resources and stormwater management engineering projects, such as: generating terrains from multiple data types including LIDAR and survey, creating stormwater drainage networks for hydrologic and hydraulic modeling, analyzing and generating land use data, floodplain mapping, raster manipulation and analysis, creating stormwater infrastructure GIS inventories, writing Python scripts to automate GIS tasks and perform data manipulation, and providing general GIS mapping support for presentations and reports.  He has also participated in public meetings and outreach to answer citizens’ questions regarding floodplain mapping.



Sep 2019 - Website Update

We've been working on giving our website a new look. Please bear with us as we bring content online.



DeLoach Engineering Science, PLLC

1845 Ivanhoe Road  Orlando, Florida  32804