New River (England) - Construction

Construction

The design and construction of the New River is often attributed solely to Sir Hugh Myddelton. However, an Edmund Colthurst first proposed the idea in 1602, obtaining a charter from King James I in 1604 to carry it out. However, after surveying the route and digging the first two-mile long stretch, Colthurst encountered financial difficulties and it fell to Myddelton to complete the work between 1609 and its official opening on 29 September 1613. Myddelton gave some of the shares in the New River Company to Colthurst.

The expense and engineering challenges of the project—it relied on gravity to allow the water to flow, carefully following the contours of the terrain from Ware into London, and dropping around just five inches per mile (8 cm/km)—were not Myddelton's only worries. He also faced considerable opposition from landowners who feared that the New River would reduce the value of their farmland (they argued that floods or overflowing might create quagmires that could trap livestock); others were concerned at the possible disruption to road transport networks between Hertfordshire and the capital. Myddelton, however, was strongly supported by the king, who agreed to pay half the project's expenses in return for a 50% shareholding; such backing quickly silenced the scheme's critics.

When it was originally constructed, long sections, for example around Forty Hall and in Hornsey, wound around the heads of small tributary valleys of the Lea. Other sections of the river, including the one in Harringay, were carried across valleys in wooden aqueducts lined with lead and supported by strong timbers and brick piers. In at least one section, locals referred to the river as the boarded river. Improvements in canal making in the 18th century led to these sections being replaced by clay-banked canals.