Officials say upgrading Hyde Stadium in Pierre would cost $1.2 million.
The stadium is home to high school, youth, American Legion and amateur baseball teams. It also hosts middle school football practices.
The 79-year-old stadium has an old lighting system, bathrooms that are not accessible to the disabled, and dugouts that flood in heavy rains.
The American Legion post is proposing to split the project cost with the city, to get the project started next year. The City Commission would have to approve funding.