Storm & Sanitary Sewers

Design sewers with ease and generate complete submission-ready design sheets.

Automated sewer design

InterHyd automatically assigns pipe sizes and inverts to optimize the system based on the flow and minimum cover to your grading surface. Maintain full control by “locking” any value (ex. inverts, sizes, slopes, etc.) and letting InterHyd update everything else based on those constraints.

Streamlined CAD interface

InterHyd makes it fast and easy to create and modify sewer systems. Simply click and drag to connect components and watch the design update instantly. InterHyd syncs with AutoCAD and generates Civil3D pipe networks, so your plans always match the calculations.

Submission-ready design sheets

Make sure your submission material is always up to date by exporting fully-functional and formatted Excel design sheets with a single click. These design sheets exactly replicate the results seen in InterHyd, and can be customized to match your company branding or municipal templates.

Customizable design criteria

Specify municipal standards so that InterHyd can create compliant designs. InterHyd checks for errors and immediately informs you if the design does not meet the criteria.

Pipe crossings

InterHyd will automatically detect pipe crossings, calculate the separation, and design the sanitary sewer below the storm sewer based on the minimum required separation.

IDF data

Enter IDF data for any number of storm events, and specify the event used for sizing storm sewers. Easily enter runoff coefficient modifiers where mandated by municipalities.

Sanitary flow sources

Specify how different sanitary flow sources are calculated to exactly match the municipal criteria. Easily handle inflow and infiltration, catchments with composite land uses, and different population types.

Quantity control discharge

When paired with the Stormwater Quantity Control module, InterHyd will automatically size storm sewers downstream of stormwater management facilities based on the controlled discharge.

Stormwater Quantity Control

Ensure flow targets are met and generate all the supporting calculations.

Compare multiple scenarios

Create and compare any number of scenarios (ex. pre- and post-development), and see the results update instantly with every change you make (i.e. peak flows, storage volumes, high water levels, etc.).

Add storage

Add storage components to model storage from ponds, parking lots, roof tops, underground tanks, etc. When paired with the Storm & Sanitary Sewers module, InterHyd will also account for all pipe and structure storage.

Add control devices

Add control devices such as orifices, weirs, or custom rating curves to control discharge rates from the system. Multiple controls can be added (ex. a two-stage orifice outlet), and controls can also be added in series (ex. a roof-top control that discharges into an underground storage system).

Modified Rational Method

InterHyd will calculate the peak flows, storage volumes, high water levels, etc., based on the Modified Rational Method. Several variations are available to meet local standards. InterHyd will inform you if adequate storage is not being met.

Submission-ready supporting calculations

Make sure your submission material is always up to date by exporting fully-functional and formatted Excel supporting calculations sheets with a single click. These calculations exactly replicate the results seen in InterHyd.

IDF data

Enter IDF data for any number of storm events. Easily enter runoff coefficient modifiers where mandated by municipalities.