* The Tay Branch extends from Lower Rideau Lake to Perth, a distance of 9.8 kilometres (6.1 miles). Two locks (Beveridges #33 & Beveridges #34) raise boats a total of 7.6 metres (25 feet) into the Tay Canal.

** This is the full length of the lock from the point of the upper sill to the point of the lower sill. The lock is actually 124 feet (37.8 m) long in the chamber, measured from the point of the lower sill to the face of the breastwork. The lower gates require 13 feet (4.0 m) of room for their swing, so a vessel must be less than 111 feet (33.8 m) long. Since the walls of the lock slope inwards, the internal width at the lower navigation water level in the locks is 31.5 feet (9.6 m).

*** Normally the locks are maintained with a draught of 1.7 metres (5.5 feet). However even the 5 foot minimum is subject to water availability and all vessels with a draught of over 1.2 metres (4 feet) should contact the Rideau Canal Office of Parks Canada prior to traversing the canal.

**** The Canal used to allow boats with a length of 33.5 metres (110 feet) and a width of 9.1 metres (30 feet) width to traverse the system. If your vessel is less than these dimensions, but greater than the maximum shown in the chart, contact the Rideau Canal Office .

* Additional boat launch ramps can be found at private marinas.
** Kemptville Creek is shallow; Kemptville bridge clearance 2.1 m (6.8 ft)
*** Small craft under 4.3 m (14.2 ft) vertical clearance may pass through La Salle Causeway by using boat channels at its eastern end.