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Lock No 46 and Adjoining Bridge No 137 on Grand Union Canal, Northchurch

Description: Lock No 46 and Adjoining Bridge No 137 on Grand Union Canal

Grade: II
Date Listed: 2 December 1986
English Heritage Building ID: 157748

OS Grid Reference: SP9584910324
OS Grid Coordinates: 495849, 210324
Latitude/Longitude: 51.7834, -0.6119

Location: A4251, Northchurch, Hertfordshire HP23 5RF

Locality: Northchurch
Local Authority: Dacorum Borough Council
County: Hertfordshire
Country: England
Postcode: HP23 5RF

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Explore more of the area around Northchurch, Hertfordshire at Explore Britain.

Listing Text

SP 91 SE
1/218 Lock No. 46,
- and adjoining
Bridge No. 137 on
Grand Union Canal


Adjoining canal lock, and road bridge over canal. Lock c.1799 as part of
the Grand Junction Canal (became Grand Union by amalgamation 1929).
Dates on gate hinge plates, 1874 on lower gate, 1896 on upper gate.
Bridge contemporary, deck changed from timber to concrete on original
wrought iron girders between 1893 and 1914. Lock of buff brick with
heavy stone edgings to lock. Timber gates with timber balance beams on
upper gates but metal beams on lower gates. Lock 88ft by 16ft to
accommodate narrow-boats in pairs. 5 old wooden bollards. Upper gates
have both gate and ground paddles: lower gates have gate paddles only.
Similar brick to bridge, close to lower gates with quadrant brick steps
between. Brick parapets over projecting band with pilaster and pier each
side of 14ft span. Cambered wrought iron built-up girders with diagonal
tie-rod below deck. Hollow moulded stone impost band to abutments and
rounded cast-iron corner protectors on towpath (N) side. Open ironwork
balustrades of hooped iron railings with 3 heavy hooped iron standards
with serpentine infill. (Branch Johnson (1970)118-20: W Branch Johnson:
Ind. Surv. of Herts. 1964-6 ref.2840 at County Planning Dept., Hertford:
inf.BMB Watford).

Listing NGR: SP9584910324

This text is a legacy record and has not been updated since the building was originally listed. Details of the building may have changed in the intervening time. You should not rely on this listing as an accurate description of the building.

Source: English Heritage

Listed building text is © Crown Copyright. Reproduced under licence.