Water Resources Engineering

I provide services in all areas of water resources engineering. I currently manage a team of talented engineers licensed in Georgia, DC, Puerto Rico, Virginia, Maryland, and the US Virgin Islands, with additional experience in Florida, South Carolina, Tennessee, Louisiana, and Illinois.

Areas of Expertise


Detention ponds. Storm sewers. Site/road drainage. Residential drainage. Erosion & sediment control. GIS stormwater infrastructure maps. Best Management Practices (BMP). Low Impact Development (LID). Stormwater Pollution Prevention Plans (SWPPP). Green Infrastructure.

Rivers and Floodplains

1D/2D river modeling. Bridge/culvert hydraulics. No-rise certifications. Scour analysis. Sediment transport. Encroachment analysis. River channelization. Geomorphology. Floodplain mapping. FEMA Letters of Map Revision (LOMR). Conditional Letters of Map Revision (CLOMR). Tidal wave modeling. Floodway management.


Municipal treatment plants. Industrial treatment plants. Sanitary sewers. Septic tanks. Pumping stations. Force mains.


Intakes. Filtration plants. Distribution systems. Transmission mains. Storage tanks. Pumping stations.


Dam-break modeling. Emergency Action Plans. Safe yield analysis. Dam level analysis. Scour and deposition analysis. Sand extraction permits. Reservoir life estimation.


Agricultural surface hydrology. Rainfall measurement. Irrigation design. Agricultural land preservation.


Environmental compliance. Hydrochemistry. Fish passage & preservation. Stream restoration.


Site layout. Power, gas, and phone utility alignment. Parking lot design. Demolition and grading plans. Utility profiles.


My work consists of combining fluid mechanics theory with field expertise and experience to solve water problems for residential, municipal, and industrial projects.


Size matters not

I have experience working with small and large clients, from helping homeowners with their backyard flood problems to helping cities improve their water quality. My team and I work with clients to find the best service arrangements, and I have a network of subconsultants that provide additional services when needed, such as surveying. Our work has included municipal design, homeowner consultations, expert witness, and environmental outreach.


I help private companies meet their seemingly unattainable deadlines by providing dedicated on-call design services. Our team has successfully tackled both new and unfinished projects and has managed to always complete them by the client's preferred deadline. Want to do the work yourself? I also provide training & education in various water resources models and methods, and I develop models & software for specific water needs.


The quality of my work is maintained through a rigorous QA/QC process where a team of senior engineers with 30-45 years of experience review our work and consult throughout the life of the project. Our team is continuously learning about new and innovative technologies while also reviewing industry standards. I maintain a foot on my fundamentals by teaching fluid mechanics to civil engineering students.


  • MS in Civil Engineering, University of Illinois at Urbana-Champaign
  • BS in Civil Engineering, University of Puerto Rico at Mayaguez
  • Licensed Professional Engineer in GA, DC, PR
  • Certified Level II Design Professional, GSWCC
  • 7 years of experience in water resources & environmental engineering
  • Over 130 projects completed in 9 states

My Engineering Team

David Ancalle, P.E.

Project Manager

I am licensed in Georgia, DC, & Puerto Rico, and have 7 years of water resources experience. I currently manage all of my team's projects and serve as the engineer-of-record for our work.

Eric J. Smith

Project Engineer

Eric is skilled in GIS, hydrology, and hydraulic modeling. He develops models and performs calculations for residential, commercial, and municipal projects, and trains staff in new methodologies and software.

Hunter Grant


Hunter is pursuing a BS in Civil Engineering from Kennesaw State University. He currently assists with wastewater and stormwater projects.

Florencia Cloitre


Florencia is pursuing a BS in Environmental Engineering from Kennesaw State University. She currently assists with wastewater and stormwater projects.

Marco Taveras, Jr.


Marco is pursuing a BS in Civil Engineering from Kennesaw State University. He currently assists with stormwater projects.

Nathan Adams


Mr. Adams has more than 30 years of experience in land development and water resources engineering. He supervises and consults on projects with a land development component

Casiano Ancalle, P.E., P.H.


Mr. Ancalle is a licensed professional engineer and professional hydrologist with more than 45 years of experience in water resources and environmental engineering. He supervises and consults on all projects with a water component.


Implementation of Green Infrastructure to Improve Water Quality and Reduce Flood Risk

For this project, my team is modeling the hydraulics and water quality of the system within the Colewood Creek watershed in Sandy Springs, GA. We are using SWMM and HEC-RAS to build our models. This project is part of the AGU's Thriving Earth Exchange initiative.

Scour Analysis for the PR-111 bridge

For this project, my team performed a hydrologic and hydraulic analysis of the stream crossing PR-111 at Km. 15.3 in San Sebastian, Puerto Rico. To address scour at the site, we designed a grade control structure to be installed downstream of the bridge. We used HEC-HMS and HEC-RAS for our models.


Flood analysis for Sedgefield Subdivision

For this project, a hydrologic study was performed to determine the causes for flooding on residential properties in Dallas, GA. The study involved modeling the runoff from an upstream subdivision and routing flow through its detention pond. We determined the causes of flooding and recommended solutions to mitigate said events. Hydraflow Hydrographs and Autodesk Storm and Sanitary Analysis were used for this analysis.


If you have a water, wastewater, stormwater, or environmental engineering need, feel free to reach out. I typically respond within a business day.