' ▁blue ▁energy ; ▁financial ▁engineering ▁etc . ▁In ▁ 2 0 0 9 ▁capital ▁and ▁maintenance ▁d red ging ▁represented ▁ 6 7 ▁per ▁cent ▁of ▁cons olid ated ▁turn over . ▁Ass ign ments ▁in ▁European ▁Union ▁countries ▁stood ▁for ▁ 3 5 ▁per ▁cent ▁of ▁cons olid ated ▁turn over , ▁with ▁ 1 8 ▁per ▁cent ▁in ▁Africa ▁and ▁ 1 3 ▁per ▁cent ▁in ▁Asia . ▁ ▁Historic ▁realiz ations ▁For ▁more ▁than ▁a ▁century ▁and ▁up ▁to ▁the ▁current ▁days , ▁DE ME - comp an ies ▁have ▁been ▁involved ▁in ▁capital ▁and ▁maintenance ▁d red ging ▁in ▁the ▁mar itime ▁approaches ▁to ▁the ▁Belg ian ▁coast al ▁ports ▁as ▁well ▁as ▁the ▁fair way ▁between ▁V l iss ingen ▁and ▁Ant werp . ▁Between ▁ 1 8 9 4 ▁and ▁ 1 9 1 1 ▁A ck erm ans ▁& ▁van ▁H aar en ▁d red ged ▁some ▁ 2 5 ▁million   m 3 ▁when ▁deep ening ▁the ▁Belg ian ▁and ▁Dutch ▁st ret ches ▁of ▁the ▁Western ▁Sch eld t , ▁a ▁volume ▁which ▁is ▁considered ▁very ▁impress ive ▁given ▁the ▁technical ▁plant ▁available ▁at ▁the ▁time . ▁After ▁the ▁Second ▁World ▁War , ▁DE ME - comp an ies ▁were ▁closely ▁involved ▁in ▁the ▁extension ▁of ▁the ▁port ▁of ▁Ant werp , ▁both ▁on ▁the ▁right ▁bank ▁of ▁the ▁Sch elde ▁during ▁the ▁major ▁ten - year ▁infrastr ucture ▁programme ▁( 1 9 5 6 – 1 9 6 7 ) ▁as ▁with