is supplied with fluid from a power source that includes a hydraulic drive means application_number US 15469980 A description reference will be had first to fig1 for a general description of the present design to the extent that it is typical in most respects of a dredging apparatus of known arrangement the numeral 10 designates a base or carrier here a floating structure such as a boat barge etc carried on a body of water the level of which is appropriately labeled the base could as well be a fixed onshore structure or equivalent site suitable for the purpose of mounting and carrying the excavator means here shown as of the type including a cage cutterhead or basket 12 or equivalent driven part keyed or otherwise fixed to a shaft 14 fig3 and 4 this shaft is carried by a support 16 normally operative in the sloped position as seen in fig1 but shown horizontally in fig3 and 4 the support is carried at its rear or boat end by any suitable means located in the area of a bracket 18 mounted on the boat and including provision for swinging of the support and basket in a vertical plane a cross pivot is shown at 20 as a suitable pivot for this purpose again as is typical the boat or carrier has mounted thereon a power source 22 which may be of any appropriate type e g internal combustion engine electric motor etc the support 16 may be regarded as that part of the boat or carrier that carries the excavator basket 12 and the shaft 14 is journaled in this support at its basket end by a bearing means here a.