CulvertMaster beats the competition hands down - the results are fast, report-ready, and stress-free. It is quite simply the best tool available for solving culvert hydraulics problems. Incredibly flexible, it builds on the input you have on-hand while providing what you are missing.

If you already know the design flowrate or tailwater, use the culvert calculator and just type it in. If not, let CulvertMaster's built-in solvers do all the work for you. It's not "quick and dirty" - just quick!

QUICK CULVERT CALCULATOR. For simple culverts with known characteristics, use the Quick Culvert Calculator to plug in the data you know and solve for what you need.

CULVERT ANALYZER. For more complex systems with multiple barrels, different shapes and sizes, special tailwater considerations, and roadway overtopping,make use of the Analyzer. Incorporate whatever data you have, including watershed data, tailwater conditions, culvert characteristics, and even weir geometry.

CULVERT DESIGNER. Use the Designer to compare several proposed options. Incorporate these design trials into complex hydraulic analyses and evaluate the results.

With all three options, just click a button to create a new "worksheet," enter your data in the clearly labeled fields, and click to solve. The data entry and manipulation are flexible and straightforward. On top of it all, you'll never have to look at another blurry nomograph or HY-8 blue screen again.

Interface & Organization
Learn CulvertMaster in just a few minutes with the built-in interactive tutorials.
Navigate your design and analysis models quickly, using tabbed dialog "worksheets" to edit watershed data, tailwater conditions, profile information, and more.
Organize all of your designs and analyses for a project within a single file. The tedious, confusing, and time-consuming demands of managing paper records or separate files are a thing of the past.
Create, copy, and delete worksheets with a click of the mouse.
Exploit the extensive, context-sensitive help system to get tips on using CulvertMaster, full-color diagrams, and fast answers to all of your questions.

Flexible Units (FlexUnits™)
Use the units you want.Display data in SI (Metric),English,or a mixture of both.
Customize the decimal precision of your displayed data. You can even use scientific notation.
Go back and forth between units effortlessly. No matter how often you change the display units for a number,the unitized value will be correct.
Catch potential errors with customizable minimum and maximum allowable values. If you enter a number that's unrealistic, CulvertMaster will warn you.

Hydraulic Analysis
Solve for whatever you need to know: headwater elevation, discharge - even the size of the culvert.
Use the widely accepted US Federal Highway Administration (FHWA)Hydraulic Design of Highway Culverts (HDS-5) methodology for performing both inlet control and outlet control computations.
Stay true to the HDS-5 equations for inlet control headwater.
Determine hydraulic grade lines using the best gradually varied flow algorithms in the industry.
Work with flow profiles that are subcritical,critical,supercritical, horizontal,and even adverse. CulvertMaster can handle the toughest backwater and drawdown conditions,including composite profiles and hydraulic jumps.
Handle free-surface flow, pressurized flow, and even transitions accurately and efficiently.
Model multiple section types, shapes, and profile geometries at the same crossing. Available section types include boxes, circular sections, arches, horizontal ellipses, and vertical ellipses.
Add a roadway or broad-crested weir to your embankment to check overtopping conditions.
Insert an unlimited number of design possibilities, and test them all simultaneously.
Use whatever tailwater information you have — a constant water elevation, a rating table, or an accepting channel section.
Choose from several available tailwater channel shapes, including rectangular, triangular, trapezoidal, and irregular shapes (such as a natural stream).
Enter the embankment characteristics (stationing, skew angle, and so forth)and let CulvertMaster determine the length of your culverts.
Automatically solve for the overtopping break point (the headwater elevation at which weir or roadway overtopping is about to occur).

Rainfall & Watershed Analysis
Directly enter the peak flow rate if you already know it. There is no need to use one of the built-in watershed analysis tools if you don't want to.
Take your pick of the widely accepted Rational Method or SCS Graphical Peak Method to automatically determine the flow at your crossing.
Toggle between design storm events and check storm events with a single click of the mouse.
Input an unlimited number of watershed subareas, along with their corresponding runoff coefficients (C coefficients for the Rational Method, CN values for the SCS Graphical Peak Method).
Let CulvertMaster automatically determine the total area and weighted runoff coefficient.

Rational Hydrology
Enter equations, tables, or Hydro-35 data to create your Intensity-Duration-Frequency (IDF) curves for Rational Method storm events.
Reuse your IDF rainfall data for projects that are in the same region. Enter the information once, and employ it as often as you need to.

SCS Hydrology
Choose an SCS type I, IA, II, or III storm for calculating the peak flow rate based on the SCS Graphical Peak Method.

Output
Create comprehensive reports, containing both input conditions and detailed calculation information.
Produce tabular views of your culvert systems to exhibit the effects of varying system characteristics.
Include as much or as little information as you want in the tabular reports, for any or all of the culverts at the crossing. Even the range and increment are customizable.
Generate stunning graphical views and reports. Focus on a single culvert, or compare multiple elements on the same graph.