The depth is ever changing for River Thames. Opposite Southend, the depth is 11 meters; at Tributary the depth is about 9.8 meters; at Woolwich the depth is about 6.5 meters and at London Bridge the depth is 1.8 meters.
How deep is the River Thames? Measurements for the Thames are taken at London Bridge, high and low tides etc. It is even difficult to state the depth of water at high and low tides as the height of these ... At London Bridge the charted depth is uk.answers.yahoo.com