Draw in Civil 3D
Closed polylines on C-HYDR layers. PRE-DA, POST-DA, soils, inlets. Layer Tools moves objects onto the right layer.
Civil 3D 2027 companion
Keep the drawing. Size the storm.
You draw closed polylines once. StormDesigner.exe talks to the plugin over a named pipe. Soils, NOAA rain, drainage areas, ditches, pipes, and the report sit in one .sdp.
Named pipeLive sync with Civil 3D
.sdp fileWorks after CAD closes
USDA soilsHSG from Soil Data Access
NOAA 14IDF and DDF in the project
How it runs
Three steps. Then you design.
Sync
Sync Current pulls the open drawing. Sync All reads the rest from disk. The .sdp caches the rings.
Calculate and print
Assign catchments. Load NOAA rain. Import soils. Size ditches and pipes. Build the book in the same window.
Inside the window
The tabs you actually use.
Click a chip. The shot follows as you scroll. This is the live program, not a mock.
Project Structure
One site. Many drawings. One file.
List every DWG on the job. Associate Current uses the drawing Civil 3D has open. Sync All reads DA, ditch, pipe, inlet, soil, and land-use polylines from disk if CAD is closed.
Drainage Areas
PRE and POST, soil by cover.
Assign closed polylines. Overlay hydrologic soil groups and TR-55 land use. Composite CN, C, area, and Tc sit on the card. Map Standard Land Uses once. Sync does not guess.
Ditches and pipes
Manning on the assigned DA.
Swale section, lining, left and right side slopes. Circular CIA plus Manning on pipes. Intensity from the storm you pick. Outlet protection reads Q, D, and V when you need riprap.
Calculation Report
A book you can send.
Contents, page order, cover fields. The compiled package is one vector PDF stored inside the .sdp. Print writes the same pages the viewer shows.
