§ Mr. Ron DaviesTo ask the Secretary of State for the Environment what is the estimated total length of68W riverways and total surface area of freshwater lakes administered by each of the English regional water authorities.
§ Mr. MoynihanThe lengths of rivers administered or controlled by water authorities vary for different functions and responsibilities. For example, the lengths of designated main rivers under the English water authorities' management for the purposes of the Land Drainage Act 1976 are:
Authority km Anglian 6,518 Northumbrian 1,459 North West 5,807 Severn Trent 3,548 Southern 2,757 South West 1,465 Thames 5,072 Wessex 2,242 Yorkshire 1,806 Total 30,674 The lengths of rivers surveyed for the purposes of the river quality survey 1985 were:
Authority km Anglian 4,328 Northumbrian 2,784 North West 5,323 Severn Trent 5,150 Southern 1,992 South West 2,941 Thames 3,546 Wessex 2,467 Yorkshire 5,767 Total 34,298 Information about the surface areas of freshwater lakes within a particular water authority's area would only be obtainable from the water authority in question.