Bradford City firefighters were called to a land rescue at the Mechanic Street Bridge this morning.
At about 11:15 a boy was either playing or on his bike and fell off the bridge and into the edge of the water.
Captain Eric Taylor says firefighters used a Stokes basket and Tower One to hoist him out.
The road was closed for a just over half an hour during the rescue effort.
Taylor could not provide any further information on the child or his condition because of privacy laws.