▁the ▁second - long est ▁canal ▁in ▁Australia . ▁The ▁Den ison ▁Canal ▁was ▁brid ged ▁by ▁a ▁hand - oper ated ▁swing ▁bridge ▁until ▁ 1 9 6 5 , ▁when ▁a ▁larger ▁and ▁elect r ically ▁operated ▁bridge ▁was ▁installed . ▁ ▁Character istics ▁ ▁The ▁Den ison ▁Canal ▁is ▁ ▁long , ▁or ▁ ▁long ▁if ▁its ▁d red ged ▁approaches ▁are ▁included . ▁It ▁is ▁ ▁wide ▁at ▁ground ▁level , ▁dro pping ▁to ▁ ▁at ▁low ▁t ide . ▁Water ▁depth ▁var ies ▁from ▁ ▁at ▁high ▁t ide ▁to ▁ ▁at ▁low ▁t ide . ▁While ▁the ▁canal ▁was ▁once ▁able ▁to ▁be ▁used ▁by ▁small ▁trad ing ▁vessels , ▁only ▁small ▁fish ing ▁and ▁recre ation ▁boats ▁can ▁now ▁pass ▁through ▁the ▁sh ifting ▁sand ▁bars ▁in ▁Black man ▁Bay ▁on ▁the ▁eastern ▁approaches ▁to ▁the ▁canal . ▁ ▁See ▁also ▁ ▁Can als ▁in ▁Australia ▁ ▁References ▁ ▁Further ▁reading ▁ ▁Den ison ▁canal ▁at ▁www . aus can al . org ▁ ▁Category : Can als ▁in ▁Australia ▁Category : W ater ▁transport ▁in ▁Australia ▁Category : Transport ▁buildings ▁and ▁structures ▁in ▁Tas mania ▁Category : E ast ▁Coast ▁Tas mania ▁Category : Can als ▁opened ▁in ▁ 1 9 0 5 ▁Category : For est ier ▁Pen ins ula <0x0A> </s> ▁Laura ▁El la ▁D uk es ▁( 1 0 ▁June ▁ 1 9 0 7 ▁– ▁ 1 0 ▁or ▁ 1 4 ▁October ▁ 1 9 9 2 ), ▁sometimes ▁cred