Users of the guide should make the indicated additions to their copies of the guide, and Districts and projects should insure that the changes are made so that the guide is current.
Additions consist of pen and ink changes and new pages to be replaced or inserted into the guide.
If multiple copies of the guide exist in an office, copies of the additions should be made for insertion into all office copies. This memorandum should be filed with the user's guide as a record of the update. If questions arise concerning this update, please contact George Dempster, Data Management Section, or Will Thomas or Alan Lumb, Surface Water Branch, for assistance.