Trackside sand drain

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1. A pipe drain installed along the inner circumference of a running track to drain both the track surface and the enclosed field area; perforated pipe is laid in a trench and covered with gravel, then the trench is filled to the surface with 4" to 6" of coarse sand.

track.drain01.JPG

The drain is being installed for a new track.
Source: http://www.onekama.k12.mi.us/h2003/new.track/