Last lock on the river; 71 m ASL 173.18 River Windrush 159.34 River Evenlode 155.46 Thames (Oxford By-pass) Bridge ( A34 ) 148.88 River Cherwell , Oxford 146.83 Isis Bridge - Oxford Ring Road ( A423 ) 143.34 River Thame , Dorchester-on-Thames 136.47 Abingdon Bridge , Abingdon ( A415 ) 131.02 Appleford