Bentley SewerCAD V8i

Wastewater Collection Modeling and Design





Municipalities, utilities, and engineering firms around the world use SewerCAD to plan, design, analyze, and optimize their wastewater collection systems. An easy-to-use interface, automatic design features, and stunning presentation tools will help you focus on engineering better sewer collection systems.

SewerCAD can be used to model both pressurized force mains and gravity hydraulics with ease, by using steady-state analysis with various standard peaking factors and extended-period simulations.

With your choice of a stand-alone or AutoCAD interface, you can build complete system profiles on-the-fly with full layer annotation and placement control, instantly recognize bottlenecks in your system with dynamic presentation and reporting tools, and use automated design tools to propose improvements and assess the financial impact of suggested changes.


Detailed Feature List: Learn more about SewerCAD, from available interfaces to hydraulic and loading methods to data management and productivity tools.



Who Uses

Users of SewerCAD include:

  • Utilities
  • Municipalities
  • Engineering firms

And others who are primarily involved with design of new sanitary sewer systems or extensions of existing systems. A typical use is design of the sanitary sewer system in a new land development project.


Click for larger imageClick for larger image

 Click for larger imageClick for larger image

Click for larger imageClick for larger image

 Click for larger imageClick for larger image

Click for larger imageClick for larger image

 Click for larger imageClick for larger image


Effortless sewer modeling

New SewerCAD users quickly learn their way around using the interface they feel more comfortable with, while experienced modelers discover new time-saving tools every day.

Choose between a scaled or schematic environment (or a combination of both), use scaled background layers as drawing aids, lay out with confidence with unlimited undo and redo, split pipes, morph elements, reconnect pipes on the fly, and set up element prototypes to streamline data entry.

Effortless sewer modeling
Enlarge image

Exercise your platform freedom

SewerCAD is available in three compatible and interchangeable interfaces: Stand-alone, MicroStation, and AutoCAD. Choose the environment that best fits your skills to facilitate and optimize your modeling workflow.

The MicroStation interface, included at no additional cost with all SewerCAD versions, provides a geospatial and engineering design environment with unrivaled visualization and publishing tools.

The stand-alone interface offers unparalleled ease of use and versatility, multiple background support, and conversion utilities from CAD, GIS, and databases.

The AutoCAD interface is designed for users that want a higher level of precision by leveraging AutoCAD's drafting tools, seamlessly integrating their SewerCAD models in a CAD environment.

Interested in ArcGIS-integrated sewer modeling? Check out SewerGEMS.
(SewerCAD users can upgrade to SewerGEMS)

SewerCAD platform interfaces: Stand-alone and AutoCAD
Enlarge image

Minimize your capital investment

Let SewerCAD automatically design an entirely new network, or sections of an existing one, by simply entering your design restrictions: velocities, slopes, cover depths, and pipe and manhole matching offsets. SewerCAD will recommend the most cost-effective pipe sizes and invert elevations, avoiding unnecessary pipe trench excavation.

SewerCAD minimizes your capital investment
Enlarge image

Look at sewers the right way

System profiles are the best way to visualize potential bottlenecks and improvement opportunities, and they are just a couple of clicks away with SewerCAD.

Build profiles through both gravity and pressure sections, animate hydraulic grade lines and annotation through an Extended Period Simulation, save and recall profiles to avoid recreating them from scratch, and create templates with your specific design requirements.

Visualize sewers with SewerCAD
Enlarge image

Find more time for engineering

Time-saving features help you streamline data entry and leave you more time for engineering and decision-making. Use flexible tabular reports, maintain your own engineering attribute libraries for faster data input, and manage engineering units on the fly.

SewerCAD: Time-saving features
Enlarge image

Jump-start your model with existing data

Leverage virtually any data source to jump-start your model building process and get your model up and running in no time. If you already have CAD drawings, GIS files, or external databases for your sewer system, you are only a few clicks away from having a SewerCAD model of your network. Bidirectional connections between shapefiles, databases, spreadsheets, and your SewerCAD model help you make changes to your model as your source data changes.

Jump-start your model
Enlarge image

Easy load estimation

SewerCAD’s sanitary loading features help you to accurately estimate dry and wet weather contributions to the collection system.

The LoadBuilder™ module included in SewerCAD helps engineers allocate sewer loads based on a variety of GIS-based sources such as customer water use billing data, area-wide flow measurement, or polygons with known population or land use.

Use customizable unit load libraries for estimation based on contributing population, service area, and total dry weather discharge or build your own loading types. Select from pre-defined extreme flow factor methods, including Babbit, Harmon, Ten State, and Federov’s, or implement your own.

You can also determine infiltration based on pipe length, diameter, surface area, length-diameter, or user-defined data and manage multiple flow hydrographs for Extended Period Simulations.

Easy load estimation
Enlarge image

Control of gravity and pressure hydraulics

Analyze pressure or free surface flow conditions using SewerCAD's robust algorithm* for solving for subcritical, critical, supercritical conditions, and complex composite profiles.

Run steady-state analyses to evaluate your designs under extreme flow conditions, while extended period simulations help you visualize how the system behaves over time, helping you locate hydraulic jumps and surcharging sections. Simulate real-time controls with SewerCAD turning pumps on and off based on time, flows, pressures, and wet well levels, among other criteria.

You can choose from different friction methods like Manning, Kutter, Darcy-Weisbach, and Hazen-Williams and calculate structure headloss with a variety of methods including FHWA HEC-22 and AASHTO.

*SewerCAD uses a gradually varied, standard-step algorithm. For a dynamic engine that solves the full Saint Venant equations, check out Bentley'sSewerGEMS.
Control of gravity and pressure hydraulics
Enlarge image

Organize scenarios for better decision

The exclusive Scenario Control Center helps you organize an unlimited number of topology, physical, design, hydrology, network topology, and operational scenarios to make faster and more accurate decisions with a single SewerCAD file.

Sound decision-making for your sanitary sewer system requires the consideration of multiple engineering scenarios, such as:

  • Rehabilitation alternatives for multiple planning horizons
  • Pump control strategies for energy-saving operation
  • Sewer design approaches with varying peak flow methods
  • Overflow scenarios with varying future wastewater flows
Scenario Control Center
Enlarge image

Understand results easily

Spot bottlenecks and potential surcharging with animated 3D graphs and profiles, use property-based color coding, element symbology, and annotation to easily visualize your input and results and create tabular reports, system-wide summaries, and project inventories on the fly.

Easy visualization of results
Enlarge image