The Underground Storage Chamber panel of the Storage Area Data dialog box allows users to define the underground storage chamber specifications for the storage area. This article describes how to interact with the Underground Storage Chamber panel. Refer to this article in our knowledge base to learn more about the Storage Area Data dialog box.
Follow the steps below to define the specifications for the underground storage chambers:
- In the Storage Area Data dialog box, select Underground Storage Chamber from the Storage Area Specifications dropdown combo box.
Note: The Underground Storage Chamber data panel entry is enabled only when the user selects the Underground Storage Chamber option in the Storage area volume dropdown combo box of the General Specifications panel. Otherwise, this data panel entry is disabled (i.e., grayed out).
- The corresponding panel with options for defining the underground storage chamber will be displayed.
The following subpanels are available in the Underground Storage Chamber data panel:
- Chamber Details
- Chamber System Design
- Summary
Chamber Details
In the Chamber Details subpanel, the Underground Storage Chamber Details section displays the information about the selected storage chamber manufacturer and associated model.
The following parameters are available:
- Storage chamber manufacturer
This read-only field displays the selected storage chamber manufacturer name.
- Storage chamber model
This read-only field displays the selected storage chamber model. Clicking the [Select] button temporarily disappears the Storage Area Data dialog box and displays the Select Underground Storage Chamber lookup dialog box. This dialog box allows the user to select the storage chamber model. After selecting the storage chamber model, the Storage Area Data dialog box will be redisplayed. The selected storage chamber model will be displayed in the Chamber Details subpanel. Refer to the Select Underground Storage Chamber section (explained below) to learn more about this dialog box.
- Storage chamber model Image
The image available in this section displays the preview of the selected storage chamber model.
- Description Box
The description box displays the selected storage chamber model specifications provided by the manufacturer. The following specifications are displayed:
- Manufacturer’s name
- Storage chamber model
- Chamber height
- Chamber width
- Chamber length
- Chamber volume
Select Underground Storage Chamber
The following panels are available in the Select Underground Storage Chamber dialog box:
- All Storage Chambers
- Recently Selected
- Favorites
All Storage Chambers
In the All Storage Chambers panel, the Underground Storage Chamber Selection section allows the user to select the storage chamber manufacturer and associated model to be used for the selected storage area.
The following parameters are available:
- Storage chamber manufacturer
This dropdown combo box allows the user to select the storage chamber manufacturer. The software supports the following storage chamber manufacturers:
- ADS StormTech
- Cultec
- NDS StormChamber
- Prinsco
- Triton
Clicking the […] button displays the Select Storage Chamber Manufacturer lookup dialog box that allows the user to select additional storage chamber manufacturers. The selected storage chamber manufacturers will then be listed in the Storage chamber manufacturer dropdown combo box.
- Storage chamber model
This read-only field displays the currently selected storage chamber model. Note that only one storage chamber model can be selected at a time.
- Search Box
The search box allows the user to quickly find a specific underground storage chamber model from the available list. The user can click the [Clear] button to remove any text entered in the search field.![Search Box - [Clear] button](https://knowledge.civilgeo.com/wp-content/uploads/2026/03/Defining-Underground-Storage-Chamber-Image-6.png)
Recently Selected
In the Recently Selected panel, the software lists the most recently used storage chamber models for each manufacturer. Note that this panel can list only 10 storage chamber models.
Favorites
In the Favorites panel, the user can quickly access frequently used storage chamber models. This panel displays storage chamber models that have been marked as favorites. To add a storage chamber model to the Favorites panel, select the model from the All Storage Chambers panel and click the Star icon.
Once the storage chamber model has been selected, click the [OK] button. The selected storage chamber model, along with associated information such as manufacturer name, model name, dimensions, and image, will be displayed in the Chamber Details subpanel.
Chamber System Design
In the Chamber System Design subpanel, the Chamber System Specifications and Layout section allows the user to define the specifications and layout of the storage chamber system.
The following tab panels are available in the Chamber System Design subpanel:
- Chamber System Design
- Chamber System Layout
Chamber System Design
In the Chamber System Design tab panel, the Define Chamber System Layout Specifications section allows the user to define the parameters for the chamber system layout.
The following parameters are available:
- Terrain surface
This dropdown combo box allows the user to select the terrain elevation surface available in the project.
- Space between chamber rows
This entry field defines the gap between storage chamber rows so that the stone fill can be inserted.
- Storage area excavation wall to chambers
This entry field defines the buffer distance provided from the storage area boundary. Note that the storage chambers can only be placed inside this buffer region.
- Chamber row header distance (optional)
This entry field defines the width of the header manifold, which will be provided to each chamber row.
- Stone cover
This entry field defines the stone cover to be placed above the storage chamber crown.
- Stone base
This entry field defines the stone base to be placed under the storage chamber.
- Stone base invert elevation
This entry field defines the invert elevation of the stone base.
- Stone void space
This spin control entry field defines the stone void space, represented as a percentage. By default, the software uses a value of 40. However, the user can enter a different value ranging from 10 to 90.
Once all required data have been defined, click the [Generate] button. The software generates the storage chamber system layout and immediately takes the user to the Chamber System Layout tab panel. Additionally, the software updates the storage area with the maximum number of storage chambers possible to maximize storage volume.
Note that the [Generate] button is enabled only when all required data have been defined in the Chamber System Design tab panel. Otherwise, this button will be disabled (i.e., grayed out).
Chamber System Layout
The Chamber System Layout tab panel displays a preview of the storage area created on the Map View. Initially, the preview shows the current Map View extents, but the user can zoom and pan this view using the mouse cursor.
The following parameters are available:
- Project base map provider
This dropdown combo box allows the user to select the project base map from several high-quality base maps.
- Use grayscale base map
This checkbox option allows the user to change the base map to grayscale instead of color.
Editing Storage Chamber Layout
Clicking the [Edit Layout] button temporarily disappears the Storage Area Data dialog box and displays the Edit Layout dialog box. This dialog box allows the user to adjust the layout of the storage chamber more precisely. In this dialog box, the user can define the storage area boundary and manually add or remove storage chambers. After making the necessary changes, click the [OK] button to save the layout. The Storage Area Data dialog box will be redisplayed, and the Chamber System Layout preview tab will be updated with the changes made. To abort the process, click the [Cancel] button.
The Edit Layout dialog box provides the following toolbar commands for editing the storage chamber system layout:
| Toolbar Command Icon | Toolbar Command | Description |
|---|---|---|
 | Move & Rotate Storage Chamber Layout Grid | This command moves and rotates the layout grid along with the storage chambers. |
 | Move & Rotate Storage Chamber Boundary | This command moves and rotates the boundary of the storage chamber. |
 | Edit Storage Chamber Boundary | This command edits the vertices of the storage chamber boundary. |
 | Move Storage Chambers | This command moves selected storage chambers within the storage chamber layout grid. |
 | Add Storage Chamber | This command adds a new storage chamber to the storage chamber layout grid. |
 | Add Chamber Header | This command adds a storage chamber header to the ends of the storage chambers. |
 | Remove Chamber Header | This command removes the storage chamber/header from the storage chamber layout grid. |
 | Flip Chamber Header | This command flips the storage chamber header from top to bottom or bottom to top within the chamber guidelines. |
 | Measure Distance | This command measures the distance on the storage chamber layout view by drawing a temporary polyline. |
 | Toggle display of Base Map | This command shows or hides the base map layer in the Map View. |
In addition, the user can zoom and pan the storage chamber layout grid in Map View. Refer to this article in our knowledge base to learn more about the other tools available in this dialog box.
Summary
The Summary subpanel provides a volume summary for the storage chamber system, including the depth-area-volume plot and corresponding data in a tabular format.
The following tabs panels are available in the Summary subpanel:
- Volume Summary
- Depth-Area Volume Plot
- Data Table
Volume Summary
In the Volume Summary tab panel, the Storage Chamber System Volume Summary section displays the volume summary for the storage chamber system. Note that this section is populated only when the user has generated the storage chamber system layout from the Chamber System Design subpanel.
The following parameters are available:
- Total storage chambers
This read-only field displays the total storage chambers placed in the storage chamber system.
- System footprint area (including buffer)
This read-only field displays the footprint area of the storage chamber system, which is equal to the area of the buffer polygon.
- Total excavation volume (including buffer & cover)
This read-only field displays the volume of the earthwork to be excavated for the storage chamber system, including exterior buffer and ground cover.
- Total ground cover volume
This read-only field displays the volume of excavation required to provide ground cover to the storage chamber system.
- Total storage chamber volume (without stone fill)
This read-only field displays the total storage volume of the storage chambers.
- Total stone fill required (includes void space)
This read-only field displays the storage volume of the stone fill (including void space).
- Stone void volume
This read-only field displays the storage volume provided by the voids of the stone fill.
- Total system storage volume (chambers & stone void space)
This read-only field displays the total storage volume defined by the storage chamber system. This volume includes the storage volume of the storage chambers and the stone fill voids.
Clicking the [Calc] button computes the volume summary for the storage chamber system. Note that the [Calc] button is enabled only when changes are made in the chamber system layout using the Edit Layout dialog box. Otherwise, this button is disabled (i.e., grayed out).
Clicking the [Chamber Report] button displays the Underground Storage Chamber Report dialog box, which allows the user to generate a report of the storage chamber system in Microsoft Word or PDF format. Refer to this article in our knowledge base to learn more about the Underground Storage Chamber Report dialog box.
Depth-Area-Volume Plot
In the Depth-Area-Volume Plot tab panel, the Storage Chamber System Depth-Area-Volume Plot section displays the depth-area-volume plot of the storage chamber system based on the computed volume summary from the Volume Summary tab panel.
Data Table
In the Data Table tab panel, the Storage Chamber System Depth-Area-Volume Data Table section displays the depth vs. area and volume data in a tabular format based on the computed volume summary from the Volume Summary tab panel.
The following read-only columns are available in the Storage Chamber System Depth-Area-Volume Data Table section:
- Depth
This read-only column displays the cumulative depth value of the storage chamber system.
- Void Space Area
This read-only column displays the cumulative value of the void space area of the storage chamber system at the corresponding depth.
- Void Space Volume
This read-only column displays the cumulative value of the void space volume of the storage chamber system at the corresponding depth.