
Sewer and stormwater design in minutes, not hours.
- Automate storm & sanitary sewer design
- Meet flow targets
- Reduce errors
- Generate submission-ready design sheets and supporting calculations
“InterHyd’s been a huge upgrade for us. It’s basically consolidated what used to take three different tools plus sketch time into a single platform for about 98% of our projects. On a typical job, we’re getting through storm and SWM calcs in less than half the time it used to take. Definitely a big win on our end.”
Geoff Dale, P.Eng.
Principal, Robert E. Dale Ltd.

Streamlined CAD
InterHyd’s CAD interface was built from the ground up to meet the specific needs of sewer and stormwater designers, allowing you to easily draw and modify sewer networks. InterHyd syncs with AutoCAD and Civil3D pipe networks, so your plans are always up to date.
Automated Design
InterHyd’s real-time calculations and automated design capabilities give you immediate feedback on the design of your sewer systems, allowing you to iterate faster than ever before. Modifications that would have previously taken hours to complete are now updated instantly.
“InterHyd makes designing gravity pipe networks quick and painless. The intuitive interface allows us to evaluate different options in short order and be sure we are providing the best value to our client. Between initial design, iteration to meet site-specific criteria, and straightforward reporting, InterHyd saves us time on every project.”
Civil Designer
Ottawa Area
Error Checking
Design in confidence with the help of InterHyd’s error-checking system. Design issues can be quickly identified and resolved as they appear, significantly cutting back on lengthy review cycles.
Submission-Ready Design Sheets
Save time and reduce errors by generating complete and fully-functional Rational Method Excel design sheets with a single click. This includes both sewer design sheets (storm & sanitary) and the full set of quantity control calculations required to demonstrate peak flow control (i.e. peak flows, storage volumes, HWLs, scenario comparisons, etc.).
Use InterHyd on your next project.

Hi, I am Oliver Beaudin, P.Eng.
I am the founder of Downstream Dynamics Inc. and the creator of InterHyd. I have over a decade of experience in land development, specializing in hydrology/hydraulics design and modelling for a large variety of projects. I now offer that expertise to other civil engineering firms via consulting and specialized design software.
Contact me or find me on LinkedIn.
