Locating Main And Branches
There are various systems of drainage.
Wherever a branch or lateral joins the main, the means of drainage is
duplicated within the area that the main can drain, and the system
should call for the least possible waste of this sort. It usually is
best that the main take the center line of the low land, laterals being
used to bring the water to the main from both sides, but there is less
duplication of work when the main can be at one side of the wet land.
Branches of the main may be needed to reach remote parts of the area.
Next: The Laterals
Previous: The Outlet