Dredging of quay 60 of DANGOTE CEMENT at the Port Authority of Douala Project Details Info. Client: DANGOTE CEMENT Client: Port Authority of Douala Description. Dredging of quay 6O of DANGOTE CEMENT in the Port of Douala with the dredger Gerrit of power 2X3208 CH Point 1 Gerrit dredger of power 2X3208 CH, capable of dredging to a depth of more than 13 meters and discharging the sediments to a distance of 300 meters. Point 2 Its 16 bar high-pressure water jet pump can break up materials in situ