what are the listed canals?
aberdeenshire canal, buchan canal, caledonian canal, crinan canal, dingwall canal, forth and clyde canal, glasgow, paisley and johnstone canal, monkland canal, stevenston canal, union canal
which is crinan canal?
crinan canal
what is its length in miles?
9
what are the listed lengths in miles of all the canals?
18, , 62, 9, 1.1, 35, 11, 12.25, 2.25, 31.5
which are double of crinan's 9 miles?
18
what canal does that value belong to?
aberdeenshire canal