▁design ▁and ▁construct ▁contract ▁was ▁awarded ▁by ▁the ▁C ork ▁Corporation ▁on ▁beh alf ▁of ▁the ▁National ▁Ro ads ▁Author ity . ▁ ▁The ▁N RA ▁received ▁financial ▁assistance ▁from ▁the ▁C oh es ion ▁Fund ▁of ▁the ▁European ▁Union . ▁ ▁In ▁the ▁early ▁ 9 0 s , ▁E w bank ▁P ree ce ▁Oh E och a ▁( former ly ▁De Le uw ▁Ch ad wick ▁Oh E och a , ▁and ▁later ▁to ▁become ▁part ▁of ▁M ott ▁Mac Donald ) ▁super vised ▁a ▁major ▁ge ote chn ical ▁investigation , ▁conducted ▁a ▁hyd ra ul ic ▁study ▁of ▁the ▁river , ▁and ▁carried ▁out ▁an ▁environmental ▁impact ▁study . ▁E w bank ▁P ree ce ▁Oh E och a , ▁in ▁association ▁with ▁Sym onds ▁Tra vers ▁Morgan , ▁produced ▁a ▁concept ual ▁design ▁and ▁tender ▁documents ▁for ▁C ork ▁Corporation ▁on ▁a ▁design ▁and ▁construct ▁format ▁based ▁on ▁geometric ▁and ▁performance ▁specification . ▁Th ir teen ▁parties ▁showed ▁interest ▁in ▁the ▁contract . ▁From ▁these , ▁four ▁cons ort ia ▁were ▁selected ▁and ▁C ork ▁Corporation ▁made ▁a ▁final ▁contract ▁decision ▁in ▁December ▁ 1 9 9 4 . ▁As ▁is ▁typical ▁on ▁a ▁large - scale ▁project ▁of ▁this ▁type , ▁the ▁chosen ▁contract or ▁was ▁a ▁joint ▁vent ure ▁of ▁T arm ac ▁W alls ▁J V , ▁formed ▁by ▁T arm ac ▁Const ruction , ▁now ▁known ▁as ▁Car ill ion , ▁and ▁P . J . ▁W alls ▁( C ivil ) ▁Ltd