Autodesk continues a mid-summer barrage of updates and hotfixes for the latest release of
AutoCAD Civil 3D 2016.
Earlier this week Autodesk released a Help file update for Storm Sewers 2016 Help.
The new compiled CHM file is available from the Autodesk AutoCAD Civil 3D updates download page.
The zip file is available on the same page with the latest AutoCAD Civil 3D 2016 Service Park 1.
But this help update is not currently included in the Service Pack itself.
The file must be manually downloaded, extracted, and used to replace the installed Storm Sewers Help file. Details are supplied in a readme available on the download page.