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Leesburg, Ohio | Those sizes and grades will work just fine if everything is in good repair, but only to a 1/4"/hr drainage coefficient capacity.
His problem, if I understand it correctly, is he wants to increase his drainage coefficient, so that the system will handle more than 1/4" rain per hour.
The way to do that is cut down the number of acres drained thru each pipe (which are now at about capacity).
One way to accomplish that is to cut the mains into shorter segments and install a new outlet long the ditch for the new segments, and then go upstream in the laterals, lay another set of mains across to hook all the laterals to, and run each new mid-field main to the ditch with its own outlet.
Not very cheap, but as I said, increasing the drainage coefficient costs money.
Another possible way to handle the laterals would be to split each run of existing laterals with larger pipe up to the halfway point of the field, and hook the upper half of each old lateral into the new larger lateral. He would still need to split the original mains. | |
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Increasing my drainage coefficient on tiled ground..........
