Burton upon Stather Heritage Group The Keel ‘Clara’ Vessel Details for Clara Vessel Name:Clara Type:Keel Built:6th of Mar 1889 Tons:120 Length:58 Beam:14.9 Depth:7.3 Owners:Burkill of Winteringham Incidents:5th Nov 1904, collision with keel Nimble, in Aire and Calder Canal, at Bullock Bridge.