NTR, which operates Dublin's East and West Link toll bridges, has reported reduced profits of 4.6 million euros for the first half of the year.
The figure fell from 6.6 million in the same period last year, affected by a 1.3 million euro increase in the municipal rates bill at the West Link and investment in developing road, waste and energy infrastructure.
Revenue more than doubled to 38.2 million euros while profit before indirect operating costs rose 33.5% to 15.1 million euros. Earnings per share fell 30% to 20.5 cents and an interim dividend of 8.2 cents has been set.
Traffic at the West Link was up 4.2% while toll income grew by 4% to 15.9 million euros. Volumes at the East Link fell by 5.3% with toll revenue unchanged at 3.6 million euros. Construction of a second bridge at West Link began in August.
NTR also recorded a 1.2 million euro from its 50% share in Celtic Waste. NTR now owns 88% of Celtic Waste after acquiring 76.9% of its joint venture partner Celtic Utilities.
Renewable energy company Eirtricity, in which NTR has a 51% stake, contributed losses of 900,000 euros.