Autodesk TR-55 detention basin storage data file
File type: Various data file
A .bsn file is an Autodesk TR-55 detention basin storage data file. It stores detention basin storage data in binary form for use with Autodesk Civil 3D.
Found 3 different file type records with the same bsn filename suffix.
File type category:
Various data file
Date updated: November 6, 2026
Autodesk Civil 3D uses the bsn file extension for data related to TR-55 detention basin storage calculations. TR-55 is a method for analyzing runoff and detention basin behavior, and this file contains the associated basin storage data.
The file is binary application data rather than a general-purpose, human-readable document. It belongs to the Civil 3D hydrology and drainage workflow and is intended to be used by Autodesk Civil 3D on the platforms supported by that software.
Open the file through the relevant detention basin or TR-55 workflow in Autodesk Civil 3D. The binary contents are not intended to be edited directly in a text editor or opened as a standalone document.
Files with the .bsn extension cannot be converted. The data is intended to be used in Autodesk Civil 3D.
Software applications that can open bsn files:
Multiplatform
Software applications that can edit bsn files:
Multiplatform
Software capable of saving bsn files:
Multiplatform
Software apps that create bsn files:
Multiplatform
File type category:
Archive and compressed file
Date updated: September 1, 2017
Record marked as obsolete and not updated for a long time.
The bsn file extension is associated with BSA, a Russian data packing program, developed by PhysTechSoft Ltd.
The bsn file stores data archive created by BSA software.
Seems to be obsolete.
Use BSA to work with *.bsn files.
File type category:
Various data file
Date updated: November 9, 2017
The bsn file extension is associated with the SWAT (Soil & Water Assessment Tool). Basin input file defines values or options used to model physical processes uniformly over the entire watershed.
The bsn extension file is not meant to be opened manually by the user.
Files with bsn extension haven't any known conversion.
Software applications that handle other tasks involving bsn files:
Microsoft Windows
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