to meander to the south of the formation, but a new channel was cut running along the northern edge of the railway embankment, which was subsequently extended almost to Foulness Bridge, where the river flows under the railway. The station to serve Holme-on-Spalding-Moor was further to the east, and was called Holme (Yorks) when it opened in 1848, but was renamed Holme Moor in 1923, and closed in 1954. The trackbed is now a public footpath from the River Derwent to the A614 road. After closure, Foulness railway bridge was replaced by a wooded footbridge. The sewage treatment works for Holme-on-Spalding-Moor is located to the west of the settlement, on the south side of the railway embankment, and the treated effluent discharges into the river to the north of the embankment, via Main Drain. Wood Dike flows southwards and then eastwards, and also passes under to railway to join the Foulness. Just to the south of the junction, the river is crossed by the A163 at Major Bridge. It continues to the south and then the east, to be joined on its right bank by four more drains, Foss Dike, Seller Dike, Londesborough Drain and Great Committee Drain, before it reaches the hamlet of Welhambridge. Here there are two bridges, the first following the original course of the A614 road and the second a newer bypass. Once past Welhambridge, Dunn's Drain joins on the left bank, and Featherbed Drain or Commonend Drain joins on the right, to the south-west of the hamlet of Bursea. Bishopsoil Drain or Carr Drain runs parallel to Featherbed Drain for much of its length, but near the Foulness turns to the east and runs parallel to the river before joining it further downstream. Just before it reaches the Market Weighton Canal, a short drain is pumped into the river by the Hasholme pumping station. The river joins the canal below Sod House Lock, and to the north of the M62 motorway bridge. Between the junction and the motorway are a group of farms, which are called North America by the Ordnance Survey. Environment The Environment Agency measure the water quality of the river systems in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at the quantity and