3i Infrastructure, the infrastructure investment company, said its portfolio assets continue to perform well and are generating good income.Dividends and interest received from assets in the first quarter to 30 June 2011 totalled £19.8 million. Since 1 April, the group has raised £55m from the early redemption of investments into Thames Water and the sale of its debt tranche in NGW Arqiva. Its interim management statement also revealed a cash balance of £248.2 million. "The company has ample liquidity to invest in the current pipeline," revealed Peter Sedgwick, the group's chairman.The group also highlights the previously announced award of "preferred bidder status" for the Thameslink project in London. 3i is operating with Siemens Project Ventures and lnnisfree to deliver and maintain 1200 vehicles due for delivery in 2015. The shares edged up 0.30p to 121p in early trading on Tuesday.BS