Dzhankeldy Wind Power Project

Monitoring Plan; detailed and intensive carcass searches will take place 
throughout the wind farm. Best international practice will be followed in 

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Dzhankeldy 500MW Wind Farm 
ESIA Volume 2- Main Text, Tables & Figures 
269 
determining the appropriate level of search efforts as well as formulas for searcher-
bias adjustments;
 
Thresholds will be established for acceptable levels of annual losses, which will be 
determined on a species-specific basis via the principles of Potential Biological 
Removal. Should the Fatality Monitoring prove that thresholds for any particular 
species are reached, this will trigger an upscaling of mitigation. These thresholds 
will be developed in the Collision Risk Management Plan.
 
The Collision Risk Management Plan will include all operational measures that can 
be implemented to reduce collision risk. This plan will include a detailed Cut-in 
Curtailment Program, wherein turbines are shut-down and prevented from moving, 
during periods of high bat activity.
 
Stopping turbine blades from operating during low wind speeds provides a proven 
strategy to reduce collision risk at a minimal cost to energy generation. An 
effective minimisation measure is thus to in- crease the wind speed at which 
turbines become operational (the ‘cut-in speed’). Below this speed, depending on 
the model, turbine blades are either stopped from rotating, or ‘feathered’ 
(pitched parallel with the wind direction), spinning very slowly, if at all, with no 
energy output. Free-wheeling must be avoided. 
 
The exact parameters for proposed cut-in curtailment are being deliberated and 
developed by the project proponent in discussions with financial lenders and 
lenders technical advisors. It is considered that as per the relatively low bat activity 
indices registered, this will not be needed for the project. However, cut-in 
curtailment will be implemented for high-risk timings and/or areas, if ongoing 
fatality monitoring prove that accepted loss thresholds are being exceeded. The 
mechanism for this will be outlined in the Collision Risk Management Plan.
With the above measures, the residual significance is presented in the following table.