Fitch Ratings has downgraded the ratings on several Oklahoma bonds one notch — a move that could increase the state's borrowing costs on a number of projects.

The American Indian Cultural Center in Oklahoma City, the Oklahoma Museum of Popular Culture in Tulsa, some higher education construction projects and a new state Health Department lab are among upcoming bond-financed projects likely to be impacted by the downgrade.

The rating change won't impact Oklahoma Turnpike bonds, because they are backed by revenue generated by the turnpike system and are not dependent on state appropriations for the repayment of bonds.

Rating change