| Lock Name: | Aqueduct Lock |
| Waterway: | River Lee Navigation |
| Operation: | Manual |
| Maint: | Canal & River Trust |
| County: | Hertfordshire Essex |
| Length: | 85feet |
| Width: | 16feet |
| Fall: | 5feet |
| Enda: | Bow Creek |
| Distenda: | 15.5miles |
| Endb: | Hertford Castle Weir |
| Distendb: | 10.8miles |
| Coordinates: | 51.7219°N -0.0143°W |
Aqueduct Lock (Number 8) is a lock on the River Lee Navigation close to Turnford.
The lock is located in the River Lee Country Park and is adjacent to the Old River Lea and the 180acres Holyfield Lake which incorporates part of the River Lee Flood Relief Channel
The aqueduct above the lock carries the Small River Lea under the Navigation, which flows from the nearby Old River Lea.
Vehicular access at Wharf Road, Wormley car park.
Pedestrian and cycles via the towpath which forms part of the Lea Valley Walk.