Den Brook Timeline:
|2005||–||RES submit planning application to West Devon Borough Council (WDBC) for nine wind turbines in the Den Brook valley between Bow, Spreyton and North Tawton|
|2006 Jan||–||WDBC refuses planning permission|
|2006 May||–||RES file Planning Appeal|
|2007 Feb||–||Planning Inspector grants planning permission|
|2007 Mar||–||Mike Hulme lodges Judicial Appeal|
|2008 Mar||–||Judicial Appeal refused by High Court|
|2008 Apr||–||Hulme appeals to Court of Appeal|
|2008 Aug||–||Court of Appeal requires redetermination of Planning Appeal by Inspector|
|2009 Dec||–||Inspector grants planning permission with conditions|
|2010 Jan||–||Hulme lodges appeal to Court of Appeal|
|2011 May||–||Court of Appeal upholds planning permission and conditions|
|2013 Apr||–||RES applies to amend AM conditions (see 2012 RES presentation on AM, tonality and impulses)|
|2013 Aug||–||RES withdraws application to amend AM conditions|
|2014 Feb||–||RES submits scheme for complying with AM conditions|
|2015 Aug||–||RES begins construction|
The “Den Brook Amplitude Modulation Condition”:
Excess amplitude modulation was defined in condition 20 of the December 2009 planning permission as any change, upon complaint, outside the dwelling, in LAeq,125ms of >3 dB in any 2-second period ≥5 times in any minute with LAeq,1min ≥28 dB and such excess occurring in ≥6 minutes in any hour.
“LAeq,125ms” is the equivalent A-weighted continuous sound level (average) over a 125-millisecond period, “LAeq,1min” over a 1-minute period.
In other words, a 125-ms pulse of 3 dBA or greater (3 dB being the difference in noise level detectable by the human ear) can not occur in any 2-second period five or more times in six or more minutes of any hour, when those minute-long average noise levels are 28 dBA or more.
This article is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.
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