<P> Caen Hill Locks (pronounced "Cane") are a flight of locks on the Kennet and Avon Canal, between Rowde and Devizes in Wiltshire, England . </P> <P> The 29 locks have a rise of 237 feet in 2 miles (72 m in 3.2 km) or a 1 in 44 gradient . The locks come in three groups . The lower seven locks, Foxhangers Wharf Lock to Foxhangers Bridge Lock, are spread over 3⁄4 of a mile (1.2 km). The next sixteen locks form a steep flight in a straight line up the hillside and are designated as a scheduled monument . Because of the steepness of the terrain, the pounds between these locks are very short . As a result, 15 locks have unusually large sideways - extended pounds, to store the water needed to operate them . A final six locks take the canal into Devizes . </P> <P> This flight of locks was engineer John Rennie's solution to climbing the very steep hill, and was the last part of the 87 - mile route of the canal to be completed . Whilst the locks were under construction a tramroad provided a link between the canal at Foxhangers to Devizes, the remains of which can be seen in the towpath arches in the road bridges over the canal . A brickyard was dug to the south of the workings to manufacture the bricks for the lock chambers and this remained in commercial use until the middle of the 20th century . </P>

How many locks in the caen hill flight