Overslaugh

Let him look at the plan of 1832, to which the act of 1834 refers, and upon which it is founded, and he will find that it contains detailed estimates of the expense of clearing out not only the overslaugh, but also the obstructions between Albany and Troy.

Source: wiktionary

The opening in dike No. 1 at the overslaugh was completed with the exception of deepening the cut, which could only be done at midsummer.

Source: wiktionary

The ice will start in pretty large masses wherever the river is tolerably straight and the current tolerably uniform; suppose the reason why the ice dams up opposite the city less frequently than below, is because the river is less obstructed here than below; that there is here a tolerably straight, free, depp channel' has seen the ice dammed at the overslaugh and at Van Wie's point; thinks the ice at the overslaugh does not freeze to the ground; thinks the reason why the ice dams at the overslaugh, is because the ice from above shoots under the ice formed there, and at length creates so great a friction that the power from above cant remove it.

Source: wiktionary

When an officer is on duty he receives an "overslaugh" for all other duties that come to his turn, provided that they are not additional duties that he may be called on to perform .

Source: wiktionary