SIOUX FALLS, S.D. (AP) — Sioux Falls officials say one proposal for utilizing a small triangle of city-owned property could create the tallest building in the state.

The city asked for ideas for the three-quarter-acre property that straddles the Big Sioux River. It had been the site of a parking ramp.

The high-rise is one of three proposals that were submitted. The other two would use the space for park land and further develop the green space and riverfront.

The building would have 15 total levels with underground parking and rooftop garden. Plans for the 90,000-square-foot structure include a riverfront restaurant, several stories of office space and up to six stories of luxury residential units.

The building could cost $35 million.

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