Welsh Harp Bridge is a Grade II listed building in the Barnet local planning authority area, England. First listed on 16 August 2000. Bridge.
Welsh Harp Bridge
- WRENN ID
- sheer-gateway-gold
- Grade
- II
- Local Planning Authority
- Barnet
- Constituency
- Hendon MP: David Pinto-Duschinsky (Lab)
- Country
- England
- Date first listed
- 16 August 2000
- Type
- Bridge
- Address
- Welsh Harp Bridge, Cool Oak Lane
- OS grid reference
- TQ 218 876
- Coordinates
- 51.575, -0.24243
- Source
- Historic England listing
Description
Welsh Harp Bridge, also known as Cool Oak Bridge, is a road bridge over the river, built around 1835. It is constructed of brown brick laid in English bond, with engineering bricks used for the coping and stone pilaster caps.
The exterior of the bridge features identical north and south sides, each with nine bays defined by pilaster strips. There is a platband at deck level, and three central semicircular brick arches span the Brent Reservoir. The pilasters are topped with pyramid caps made of millstone grit at the parapet level, and the coping consists of bricks laid on edge. The parapet slopes at the east and west ends.
Historically, the river Brent was dammed in 1835 to create a reservoir that supplied water to the Grand Union Canal, leading to the rebuilding of an older bridge at this location.
Local climate
Welsh Harp Bridge sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 98% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.
It experiences an average of 30 freeze-thaw cycles a year, fewer than 66% of listed buildings. Of these, 13 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
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- No EPC on record for this property
- No sale records on file
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- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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