One airport was dropped from the list and the government reduced the financial value of grants.
The Brazilian development bank saw large H1 gains from the sale of shares in certain companies and improved loan book quality allowed it to reduce loan loss provisions.
Although construction of the rail line is said to have advanced around 78% ready, according to official information, media reports and observers believe it unlikely that the project will be completed before the end of President Enrique Peña Nieto's term in December.
The previous government left the final economic approval of the project in the hands of the new government.
The amount represents what the health system could save if all the population had full water and sanitation services.
The government seeks to offer a 33-year concession for the Fiol railway, which also requires the contract winner to complete the remaining 25% of project.