...+ Supportive market trends, a large backlog of orders, and lower interest expenses should enable Italy-based construction company Salini Impregilo to achieve stronger credit ratios than we had previously expected. + We are therefore raising our long-term corporate credit rating on Salini Impregilo to '##+' from '##'. + The stable outlook reflects our view that the company will maintain adjusted funds from operations (FFO) to debt of more than 45% because of the favorable operating environment and a large order backlog. PARIS (Standard & Poor's) June 24, 2015--Standard & Poor's Ratings Services today raised its long-term corporate credit rating on Italy-based construction company Salini Impregilo SpA to '##+' from '##'. The outlook is stable. At the same time, we revised our issue rating on Salini Impregilo's 400 million senior unsecured notes maturing in 2018 to '##+' from '##-'. The recovery rating on the notes is '4', indicating our expectations of average (30%-50%) recovery for the creditors...