Specifications of proposed wind turbine
High Yield 500kW Direct Drive wind turbine
Tip height: 67 metres
Hub height: 40 metres
The DIRECTWIND 54-500kW was developed in response to market demand and designed
according to EWT’s proven Direct Drive technology. This turbine is specifically designed for
operating in low/moderate wind speed areas, delivering an excellent energy yield which
ensures an optimal return on investment.
The expected annual output is 2,042 MWh. This would be enough to power 346 homes (based
on average annual consumption of house in UK as 5,896kWh, 2007 Cornwall Council figure,
referenced in Cornwall Planning Guidance). Approximately 637 tonnes of CO2 will be offset per
annum compared to electricity delivered from the national grid.
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Elevations
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Zone of theoretical visibility
It should be noted that this provides a “theoretical” zone of visibility based on landform and does not
account for hedges, buildings, woodlands, trees and other landscape features that will have a direct
impact on the actual area of visibility and are all prominent in the local area.
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Technical assessments
Environmental Impact Assessment (EIA)
The development proposed is not considered to be an EIA development within the meaning of the EIA regulations, as
although it comprises a Schedule 2 development and exceeds the relevant threshold, it is considered unlikely to have
significant effects on the environment.
Noise Assessment
Cornwall business, Inacoustic were commissioned to undertake an Environmental Noise Assessment for the proposed
wind turbine in accordance with the guidance given in ETSU-R-97.
Nearest residential noise sensitive receptors were identified and calculations were made to predict wind turbine noise
levels. The assessment found that the wind turbine noise level is below the assessment criteria given in ETSU-R-97 at
the nearest non-financially involved receptors.
Withnoe Barton Farm exceeded noise limits at 3ms-1 wind speed, however noise level is below assessment criteria
when prevailing background noise is measured and a planning condition is put in place to control the presence of any
tones.
Noise from the proposed wind turbine complies with all relevant guidance on noise, as such, noise should
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Ecological Assessments:
Cornwall based, Spalding Associates (Environmental) Ltd, were commissioned to undertake ecological surveys including bird
surveys and bat surveys for the proposed site.
Extended Phase 1
The site does not lie within a designated or non-designated conservation site. There are several designated sites within the
adjacent landscape, including a Special site of Scientific Interest (SSSI), a County Geological Site (CGS) and a Marine
Conservation Zone (MCZ).
No habitats of European Community interest are present within the site. Hedgebanks on site would qualify as Local
Biodiversity Action Plans (BAP) Priority Habitat, however they are over-managed and therefore value in terms of nature
conservation is local at most.
Bat Survey
Due to the elevated, exposed location of this site, the presence of intensively managed arable habitats and a lack of
sheltering hedgerows, habitats within this site are not deemed to be important for bats. This site is of low value for bats.
The area immediately surrounding the proposed turbine location has been shown to be used very occasionally by single
Common Pipistrelle and Noctule with a single pass by a Greater Horseshoe flying close to the southern hedgebank also being
recorded.
The proposed wind turbine can be installed at this site without a significant risk of negative impacts on
individual bats or bat populations. No mitigation is required or suggested.
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