To counter the problems existed in foundation trench dredging andhollow block hoisting construction for the workboat wharf project , rational construction scheme was adopted , which ensured successful completion of the project on schedule .
A workboat with oil booms is seen next to a lighthouse at the mouth of the mississippi river in advance of the looming oil spill from last week 's collapse and spill of the deepwater horizon oil rig in port eads , louisiana , thursday , april 29 , 2010 .
