The planned USD 24 billion Lamu port project, due to be finished by 2030, is intended to serve much of east Africa, with oil pipelines to South Sudan and railways to Ethiopia and Uganda from the Indian Ocean coast.
But the area has been hit by a recent wave of deadly attacks, largely claimed by Somalia's Al-Qaeda-linked Shebab militants but which Kenyatta has blamed on "local political networks".
Kenyatta had said yesterday that the massacres had been fuelled by companies seizing land covering a vast coastal zone nearly the size of Luxembourg "under dubious and corrupt circumstances".
"This criminal conspiracy has dispossessed individuals and families living in this region of their land and opportunities for improving their well being," Kenyatta added.
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The president today said that he had approved a USD 480 million deal with a Chinese company for the first phase of construction of three of the 32 berths planned for the flagship project.
"The signing of this contract... Is a major milestone," Kenyatta said in a statement, claiming it would make Kenya the "most attractive transport and logistics hub" in the region.
Kenya has set aside USD 50 million dollars "to immediately commence" building by state-run China Communication Construction Company, Kenyatta said.
Officials said construction at the port which has seen little activity since it was formally launched in a ceremony in March 2012 would begin as soon as September. The port alone is projected to cost USD 3 billion.