Somerset Coal Canal
...that the only working, full sized, Caisson lock ever built, was on the Somerset Coal Canal at Combe Hay, Somerset in England between 1795 and 1805?
...that the only working, full sized, <a href="./Caisson_lock" id="mwByk" rel="mw:WikiLink" title="Caisson lock">Caisson lock</a> ever built, was on the <b id="mwByo"><a href="./Somerset_Coal_Canal" id="mwBys" rel="mw:WikiLink" title="Somerset Coal Canal">Somerset Coal Canal</a></b> at <a href="./Combe_Hay" id="mwByw" rel="mw:WikiLink" title="Combe Hay">Combe Hay</a>, <a href="./Somerset" id="mwBy0" rel="mw:WikiLink" title="Somerset">Somerset</a> in <a href="./England" id="mwBy4" rel="mw:WikiLink" title="England">England</a> between 1795 and 1805?