Lock No 46 and Adjoining Bridge No 137 on Grand Union Canal
LOCK NO 46 AND ADJOINING BRIDGE NO 137 ON GRAND UNION CANAL
Listed on the National Heritage List for England. Search over 400,000 listed places
Overview
- Heritage Category:
- Listed Building
- Grade:
- II
- List Entry Number:
- 1348469
- Date first listed:
- 02-Dec-1986
- List Entry Name:
- Lock No 46 and Adjoining Bridge No 137 on Grand Union Canal
- Statutory Address:
- LOCK NO 46 AND ADJOINING BRIDGE NO 137 ON GRAND UNION CANAL
Location
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Images of England Project
- Date:
- 2001-08-08
- Reference:
- IOE01/05066/14
- Rights:
- © Mr Ronald Brown. Source: Historic England Archive
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Discover moreOfficial list entry
- Heritage Category:
- Listed Building
- Grade:
- II
- List Entry Number:
- 1348469
- Date first listed:
- 02-Dec-1986
- List Entry Name:
- Lock No 46 and Adjoining Bridge No 137 on Grand Union Canal
- Statutory Address 1:
- LOCK NO 46 AND ADJOINING BRIDGE NO 137 ON GRAND UNION CANAL
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
Location
- Statutory Address:
- LOCK NO 46 AND ADJOINING BRIDGE NO 137 ON GRAND UNION CANAL
The building or site itself may lie within the boundary of more than one authority.
- County:
- Hertfordshire
- District:
- Dacorum (District Authority)
- Parish:
- Northchurch
- National Grid Reference:
- SP 95849 10324
Details
NORTHCHURCH COW ROAST SP 91 SE 1/218 Lock No. 46, - and adjoining Bridge No. 137 on Grand Union Canal
GV II
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
Legacy
The contents of this record have been generated from a legacy data system.
- Legacy System number:
- 157748
- Legacy System:
- LBS
Sources
Books and journals
Branch Johnson, W, Industrial Survey of Hertfordshire at County Planning Department, (1964-6)
Branch Johnson, W, The Industrial Archaeology of Hertfordshire, (1970), 118-20
Legal
This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.
Map
This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 15-Jun-2026 at 11:51:44.
Download a full scale map (PDF)End of official list entry
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