Aug 17, 2015 - Autodesk releases AutoCAD Civil 3D Storm Sewers Help file update
The new Storm Sewers 2016 Help will replace the existing Storm Sewers Help file.
The file is available from the Autodesk AutoCAD Civil 3D updates download page.
The supplied zip file is available from the AutoCAD Civil 3D 2016 Service Park 1 page.
The file must be manually downloaded, extracted, and used to replace the existing Storm Sewers Help file.