Holy cow, how much higher are you trying to get the water level in the lake? Our spillways are all flush with the lakes, except every other winter when they draw the lakes down for seawall repairs...is there a grating that goes over hte top, or is it open? Ours have big metal grates that will support the weight of several men, and collect trees and all sorts of storm debris.

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2002 Ford ZX2
2 x 2013 Honda Civics