WASHINGTON, Aug. 17 — It is not often that a local government tries to turn down $10 million in federal construction money.

But then it is not every day that an Alaska congressman surprises a Florida community with the gift of a highway interchange that just happens to abut the property of a major political fund-raiser.

The money for the interchange was the work of Representative Don Young, the Alaska Republican who was chairman of the transportation committee before the last election.

Officials of Lee County considered the project a low priority, environmental groups opposed it and the Republican congressman from the district never asked for it.