Navigate any public GitHub repo of .inp models. Folders open in place; clicking a .inp loads it into the viewer. Edit the owner/repo/branch to point anywhere.
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Welcome
SWMM5 Benchmark 3D Viewer
See the EPA EXTRAN Manual test networks — the files SWMM5 is regression-tested against on the OWA GitHub — as true 3D models built from their inverts, depths, offsets and cross-sections.
What you can do:
Pick any of the 11 benchmark files (the 10 EXTRAN examples) — tide gate, orifices, weirs, storage, Type 1/2/3 pumps
Choose what the labels show — name, invert, length, n, slope, area, % imperv…
Pipes render in their real cross-section — egg, horseshoe, arch, box, trapezoid…
Click or search any element to inspect its raw .inp parameters
Load a SWMM5 .rpt to color by max depth / velocity and draw the max-HGL ribbon
Switch to the Sample models in the dropdown — six bigger real networks
Or hit GitHub… to browse and load .inp files from any public repo
Load a .out file for animated playback — watch depths fill and flow propagate through the storm
Drop your own .inp — subcatchment polygons render too — and save PNG / GIF