PRE INVESTIGATION CONCEPT INFORMATION - Organic Power

ORGANIC POWER LIMITEDFBD House, Mardyke Street, Skibbereen, Co. Cork, IrelandTelephone/Fax: 003532851951; email :info@organicpower.ieCompany Registration No. 406133 ;VAT No.:IE6426133V9) Eirgrid have no plans for undersea cables or 440kvlines to Casla due to cost, maintenance and safetyreasons. How do Organic Power propose to addressthis?As above (Jimmy)10) Why did Organic Power not consider Mount Callanas a better location as it is higher and there is a finebig lake there (Doolough lake).Mt Callan is too far from the sea for a seawater system, AFW system is already being studied at that location byanother company. We understand that the extra costsassociated with constructing 2 new reservoirs, theunsuitability of existing lake for PHES use and issues withpeat removal are major obstacles for this project(Maurice).11) Will the scheme withstand tremors?The technology for designing and building dams andappurtenant structures that can safely resist the effects ofstrong ground shaking is available. Regardless, Ireland(especially the southwest) is a region of low seismicactivity (www.dias.ie/irish_seismicity), the dams, as withthe entire schemes, will be built to safety standards, whichcomply to international regulations. The following designbasis will be used: Maximum Credible Earthquake (MCE),Maximum Design Earthquake (MDE) or Safety EvaluationEarthquake (SEE): Strictly speaking, the MCE is adeterministic event, and is the largest reasonablyconceivable earthquake that appears possible along aDirectors: Maurice McCarthy, Brian Walsh, James Nolan, Leo O’DriscollORGANIC POWER LIMITEDFBD House, Mardyke Street, Skibbereen, Co. Cork, IrelandTelephone/Fax: 003532851951; email: info@organicpower.ieCompany Registration No. 406133 ;VAT No.:IE6426133Vrecognized fault or within a geographically defined tectonicprovince, under the presently known or presumed tectonicframework. But in practice, due to the problems involved inestimating the corresponding ground motion, the MCE isusually defined statistically with a typical return period of10,000 years. Thus, the terms MDE or SEE are used assubstitutes for the MCE. The stability of the dam must beensured under the worst possible ground motions at thedam site and no uncontrolled release of water from thereservoir shall take place, although significant structuraldamage is accepted. In the case of significant earthquakedamage, the reservoir may have to be lowered (Axel).12) How will the shaft with 180tonnes of water persecond travelling down it, withstand a tremor?As for the reservoir embankments - the shaft will be builtto maximum safety criterias and a hole (the shaft) in themountain will not cause any, whatsoever, stabilityproblem. (Axel)Once the criteria Axel has outlined above are adhered tothere should be no issues. (Robbie)13) How can Organic Power be sure the mountain canhold 13.6million metric tonnes of weight from GalwayBay?Again once the EIA is completed to best standards andthe relevant characteristics of the rock determined, theengineering design can ensure no adverse effects.(Robbie)Directors: Maurice McCarthy, Brian Walsh, James Nolan, Leo O’Driscoll43