the Grantham Canal in a conduit. By this time it is below the contour. The county border between Leicestershire and Lincolnshire follows the course of the river for a short distance near the bottom lake, and beyond Woolsthorpe, the river is in Lincolnshire. Passing back into Leicestershire, it flows through Muston and Bottesford, where there are a number of bridges. At the end of Church Street, Fleming's bridge is a double-arched grade II listed medieval bridge, now just used by pedestrians, which was built for Samuel Fleming, who was rector in the village between 1581 and 1620. At Devon Lane, there is a ford, besides which stands a single-arched brick bridge, with two holes passing through the spandrels, and iron railings in the centre of the parapet. It was built in the early 19th century. Beyond the village, the river is crossed by four railway bridges, only one of which is still in use, carrying the line from Grantham to Nottingham. A fifth bridge, located in fields to the north of the village, consisting of three brick arches, carried the Newark to Leicester railway line over the river. It was opened in 1860, and ceased to be used for railway traffic in 1960. The centre arch collapsed after heavy rain in 2007, and the whole structure has been replaced by a single steel span, resting on the remains of two of the piers. The river again forms the county border, until it reaches Staunton in the Vale, which is in Nottinghamshire. The Winter Beck joins the west bank, as does the River Smite soon afterwards. The river passes Cotham which lies to the east, and runs close to a Civil War redoubt at Hawton, to arrive at the outskirts of Newark-on-Trent. Here it passes another civil war defence, the Queen's Sconce, built in 1644 at a strategic point overlooking the Devon, the Trent and the Great North Road. The site was bought by Newark Urban Council in 1912, and formed part of Devon Park, which has since been extended by further acquisitions of land. Crossing under the B6166, which follows the course of the Fosse Way Roman road at this point, the Devon joins the River Trent. Below the bridge, the river is used for moorings, and there is a marina on the western bank. The mouth is below the contour. Water Quality The Environment Agency measure water quality of