RUN-OFF WEIRS

Canal Boat - - Feature -

As well as economis­ing on wa­ter sup­plies to avoid run­ning out, canals also had to avoid prob­lems of too much wa­ter, ei­ther from heavy rain or from lock us­age – for ex­am­ple where a ‘bot­tom pound’ was fed by locks com­ing from both di­rec­tions. Usu­ally this was a sim­ple over­flow weir drain­ing into a culvert that flowed un­der the tow­path into a nearby stream, but oc­ca­sion­ally (as with this ex­am­ple on the Mont­gomery Canal) they were quite elab­o­rate af­fairs.

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