Construction is expected to begin this summer on an unfinished three-acre park atop an I-66 underpass in Rosslyn now that a snag has been resolved in Congress.

The Virginia Department of Highways and Transportation has told Rep. Frank R. Wolf (R-Va.) that this month it is requesting bids for construction of the $11 million Rosslyn Plaza Park. A dispute between the Senate and House had delayed disbursement of federal highway funds for almost a year, Wolf spokesman Jim Boyle said.

Highway projects worth billions of dollars around the country had been delayed because Congress failed last year to pass the Interstate Cost Estimate, a list of road projects and money apportioned for them. The Senate and House disagreed about various local-interest road projects attached to the measure.

In February, the two chambers reached a compromise by approving a list without those projects.

The park, to be located between the eastbound and westbound lanes of Lee Highway and N. Lynn and N. Nash streets, will be landscaped with trees, benches and fountains, and will have several elevated walkways connecting it to a nearby office building and hotel.

The Federal Highway Administration will provide 90 percent of the funds, and the state will provide 10 percent. The park is expected to be completed next year.