NS4277 : Old weir on the Overtoun Burn

taken 1 year ago, near to Bellsmyre, West Dunbartonshire, Great Britain

Old weir on the Overtoun Burn
Old weir on the Overtoun Burn
This weir on the Overtoun Burn is marked on the 25-inch first-edition OS map (surveyed in 1860), and on present-day large-scale mapping.

Although its location remains very much in the shade, the recent clearing of invasive Rhododendrons allows the weir to be seen with more context than was visible when I last photographed this feature two years earlier: NS4277 : Old weir on the Overtoun Burn.

The present photograph reveals the construction of the channel: regular blocks have been employed in the immediate vicinity of the weir itself, but there is an abrupt transition to something like a dry-stone structure just downstream from there. A little further downstream, the channel emerges into the open: NS4277 : The Overtoun Burn.

For my speculations about the possible purpose of the weir itself, see NS4277 : The Overtoun Burn. I am guessing that the stone-built channel just below the weir has much the same purpose: to prevent the burn from gradually undercutting and hence destabilising the adjacent steep slope.

Still further downstream, other modifications were made to the channel of the Overtoun burn a little later (around the end of the nineteenth century), in connection with a domestic hydro-electric scheme serving NS4276 : Overtoun House.

[Note, though, that some further work took place on the channel of the Overtoun Burn in the vicinity of the old lily pond (see below) in the 1970s as part of a job creation scheme: the gabions (baskets of wire mesh filled with rocks) visible there are clearly not nineteenth-century relics: NS4276 : The channel of the Overtoun Burn.]

For the modifications made in connection with the domestic hydro-electric scheme, see, for example, NS4276 : Sluice gate beside the Overtoun Burn / NS4276 : The channel of the Overtoun Burn / NS4276 : Former dam and lily pond / NS4276 : Remains of a turbine house.

On the recent clearing of Rhododendrons from the estate, see NS4277 : Black Wood: area cleared of Rhododendrons and NS4376 : Area cleared of Rhododendron bushes.
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NS4277, 77 images   (more nearby )
Photographer
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Date Taken
Monday, 17 July, 2017   (more nearby)
Submitted
Thursday, 27 July, 2017
Geographical Context
Rivers, Streams, Drainage 
Primary Subject of Photo
Weir 
Subject Location
OSGB36: geotagged! NS 4277 7705 [10m precision]
WGS84: 55:57.6390N 4:31.2155W
Camera Location
OSGB36: geotagged! NS 4277 7706
View Direction
West-southwest (about 247 degrees)
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Image Type (about): geograph 
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