The project has a contract sum of $163m (Sh18.7 billion).
The project is co-funded by the Japan Int. Cooperation Agency.
The project is on schedule for final completion this year.
The new bridge is expected to be ready in June.
The plant has been connected to the national grid.
The project is being undertaken by BOMI E&C Consortium.
The 70km road will be upgraded to bitumen standards.
Beijing wants Kenya to extend the SGR from Naivasha to Uganda.
The new oil terminal will handle bigger volumes of fuel products.
Plans are underway to roll out the projects by end of year.