River Severn (tidal section)
The River Severn (tidal section) is a seaway and is part of the River Severn. It runs for 22 miles and 1 furlong from Portishead Harbour Entrance (which is a dead end) to Sharpness Junction (where it joins the River Severn (old river navigation) and the Gloucester and Sharpness Canal).
The maximum dimensions for a boat to be able to travel on the waterway are 89 feet long and 18 feet and 11 inches wide. The maximum headroom is not known. The maximum draught is not known.
|Portishead Harbour Entrance
A useful place to wait for the tide
Junction of River Severn and River Avon (Bristol)
|1 mile and 2½ furlongs||0 locks|
|Second Severn Crossing
|6 miles and 4½ furlongs||0 locks|
Junction of the River Severn and the River Wye
|9 miles and 6½ furlongs||0 locks|
|Severn Bridge||10 miles and 7 furlongs||0 locks|
|Oldbury on Severn
Nuclear power station
|14 miles and 2¾ furlongs||0 locks|
|Severn - Lydney and Pidcocks Canal Junction
Junction of the River Severn and the Lydney and Pidcocks Canal
|21 miles and 3¼ furlongs||0 locks|
Junction of Gloucester and Sharpness Ship Canal with the River Severn
|22 miles and 1 furlong||0 locks|
Wikipedia has a page about River Severn
The River Severn (Welsh: Afon Hafren, Latin: Sabrina) is the longest river in the United Kingdom, at about 354 kilometres (220 mi), and the second longest in the British Isles, behind the River Shannon. It rises at an altitude of 610 metres (2,001 ft) on Plynlimon, Ceredigion near Llanidloes, Powys, in the Cambrian Mountains of mid Wales. It then flows through Shropshire, Worcestershire and Gloucestershire, with the county towns of Shrewsbury, Worcester, and Gloucester on its banks. With an average discharge of 107 m³/s at Apperley, Gloucestershire, the Severn is the greatest river in terms of water flow in England and Wales.
The river is usually considered to become the Severn Estuary after the Second Severn Crossing between Severn Beach, South Gloucestershire and Sudbrook, Monmouthshire. The river then discharges into the Bristol Channel which in turn discharges into the Celtic Sea and the wider Atlantic Ocean. The Severn's drainage basin area is 11,420 square kilometres (4,409 sq mi), excluding the River Wye and Bristol Avon which flow into the Severn Estuary. The major tributaries to the Severn are the Vyrnwy, Teme, Warwickshire Avon and Stour.