Plans and sections can also be found in WO 55 and WO 78 . Other canal plans can be found in LRRO 1 . The Ordnance Survey also compiled statistics of land use, based on the information gathered during revision of its county series maps. This included acreage ascribed to water courses. Statistics for the period 1870 to 1974 are now in OS 4 .
Material concerning fen navigations are to be found in several series.
The planning and upkeep of waterways was, for a time, the responsibility of the Countryside Division, Ministry of Housing and Local Government. From 1970 the newly established Department of the Environment assumed and broadened its responsibilities for inland waterways, particularly after the Water Act 1973. Further Reading George Bradshaw, Bradshaw's Canals and Navigable Rivers of England and Wales.