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OpenFlows CulvertMaster

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OpenFlows CulvertMaster

Culvert Hydraulic Analysis and Design Software

Stress-free culvert analysis and design

Analyze existing culverts and design new ones, from simple barrel crossings to complex embankment cross-drain systems, with different shapes and sizes, special tail water considerations, and roadway overtopping that considering watershed data, culvert characteristics, and even weir geometry.

What is OpenFlows CulvertMaster?

The FEMA-approved OpenFlows CulvertMaster is hands down the best tool available for solving culvert hydraulics problems. Incredibly flexible, fast, report-ready, and stress-free, OpenFlows CulvertMaster builds on the input you have on hand while providing what you are missing. OpenFlows CulvertMaster will pay for itself on your first project as it streamlines complicated culvert hydraulics and delivers the results you need.


Quickly deliver robust, report-ready culvert designs. OpenFlows CulvertMaster builds on the input you have on hand, providing you with any unknown design variable such as headwater depth, discharge, or culvert size.


From simple, single culvert sections to complex, multi-barrel culverts with roadway overtopping, OpenFlows CulvertMaster helps you evaluate existing culverts and compare numerous design options with ease.


Use the built-in FHWA HDS-5 methodology, SCS and rational hydrology, and robust gradually varied flow hydraulics to deliver culvert designs that will stand the test of time.

OpenFlows CulvertMaster Computer Software Screen Mockup

OpenFlows CulvertMaster

  • Calculate, design, and analyze culvert hydraulics
  • Compare culvert options
  • Analyze single-barrel crossings to complex embankment cross-drain systems

*Prices vary per region. For more options, see licensing and subscriptions section.

User Quote

"Bentley CulvertMaster was instrumental at the design development phase in aiding with the multiple design challenges facing the project."

— Adolf Montana, P.E.Project EngineerPaulus, Sokolowski & Sartor


OpenFlows Software Resources

Frequently Asked Questions

CulvertMaster is easy-to-use application for designing new culverts and analyzing existing culvert hydraulics. Analyze everything from single-barrel crossings to complex embankment cross-drain systems, with different shapes and sizes, special tailwater considerations, and roadway overtopping considering watershed data, culvert characteristics, and even weir geometry. When you design and analyze culverts, easily select from a library of standard culvert shapes, materials, and entrance conditions, then compute culvert headwater and tailwater elevations using calculation methodologies outlined in Hydraulic Design Series Number 5 from the U.S. Federal Highway Administration.

Data entry and manipulation are flexible and straight forward with CulvertMaster. You simply enter data in clearly labeled fields with full context-sensitive help and click to calculate. Quickly navigate using tabbed dialog “worksheets” to edit watershed data, tailwater conditions, and profile information. You can conveniently organize all your designs and analyses for the same project within a single file. When you interpret and present your modeling results, you can easily view detailed tables, reports, rating curves, and more.​

The price of Openflows CulvertMaster varies per region. While there are various types of licensing available, a common choice is the 12-month practitioner license offered through Bentley’s eStore. When you purchase through the eStore, you get a Virtuoso Subscription. This means you get the software and “Keys” (tokens) to redeem for customizable training, mentoring, and consulting services.


As per minimum operating system requirement

Operating System

Windows 10, Windows 8/8.1, Windows 7 SP1 (32 & 64-bit for all)


As per minimum operating system requirements

Hard Disk

150 MB of free storage space (with additional room for data files)


800 x 600 resolution, 256 colors

The most updated information about platform compatibility can be found on the Bentley Communities website.

Licensing and Subscription options

Choose What is Right for You

One-year license with training

Virtuoso Subscription – A popular choice for small and medium-sized businesses

Get access to software that comes with training – fast! Bentley’s eStore, Virtuosity, offers a convenient way to lease a 12-month license of Bentley software for a low, upfront cost. Every online purchase through Virtuosity comes as a Virtuoso Subscription that includes training and auto-renewals.

With no contract required, it’s easy to get started quickly.

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One-time purchase with support

Perpetual License with SELECT

A perpetual license of Bentley software is a one-time purchase, with a yearly maintenance subscription, called SELECT. This includes 24/7/365 technical support, learning resources, and the ability to exchange licenses for other software once a year. With SELECT, you will benefit from:

  • License pooling, so you can access your software from multiple computers.
  • Access additional Bentley software with Term Licenses, which allow you to pay for what you use without the upfront cost of purchasing a perpetual license.

Annual renewal quotes are delivered directly to your inbox, and our experienced Renewal Representatives are available to answer your questions and guide you through any changes you’d like to make.

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Enterprise Organizations

We’ve got your back

For larger organizations with in-depth requirements, we offer plans to provide global pricing and access to our comprehensive portfolio of solutions and success plan services. Contact us about how to get access to software, global best practices, implementation services, training, and technical support to help your organization realize its full potential while addressing your unique needs.

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Best-Selling Water Resources Textbook

Computer Applications in Hydraulic Engineering

This fully updated 9th edition textbook is available for download! Ideal for engineers and students in hydraulics and hydrology, offering theory and real-world applications with problem-solving and modeling exercises featuring OpenFlows WaterGEMS, HAMMER, SewerGEMS, SewerCAD, PondPack, StormCAD, FlowMaster and CulvertMaster.

Design new culverts and analyze existing culvert hydraulics

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