Weir Across River Nidd at Castle Mill is a Grade II listed building in the North Yorkshire local planning authority area, England. First listed on 12 December 1985. Weir.

Weir Across River Nidd at Castle Mill

WRENN ID
watchful-gallery-mint
Grade
II
Local Planning Authority
North Yorkshire
Constituency
Harrogate and Knaresborough MP: Tom Gordon (LD)
Country
England
Date first listed
12 December 1985
Type
Weir
Address
Weir Across River Nidd at Castle Mill, Waterside, Knaresborough
OS grid reference
SE 347 568
Coordinates
54.00653, -1.47129
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The weir across the River Nidd at Castle Mill is a Grade II listed structure dating from the late 18th century, with later modifications. It is approximately forty metres wide and constructed from large gritstone blocks. The weir likely originated with the earliest buildings at Castle Mill, with alterations made in the early to mid 19th century when a new water wheel was installed.

Local climate

Weir Across River Nidd at Castle Mill receives an average of 810 mm of rain a year. This makes it wetter than 50% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 73% of listed buildings.

It experiences an average of 43 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 22 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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Nearby listed buildings

  1. Castle Mill Wheelhouse Block on River Edge Grade II 31 m
  2. Castle Mill Central Range Parallel to and Set Back from Road Grade II 33 m
  3. Castle Mill: Central Building at Right Angle to Road Grade II 38 m
  4. Castle Mill Building to North Grade II 42 m
  5. Castle Mill Weaving Shed Grade II 48 m
  6. Castle Mill Cottage Grade II 68 m
  7. Court House Museum Grade II 141 m
  8. 1,2, Castle Ings Gardens Grade II 178 m
  9. Richmond House Grade II 188 m
  10. Railway Viaduct Over the River Nidd Grade II* 208 m