A Prince George’s County zoning authority has denied Wal-Mart’s request to build a supercenter in Oxon Hill, about a mile from National Harbor.

The decision, issued this week, appears to bring to a halt the company’s plans to expand in Prince George’s and is a victory for a group of Oxon Hill parents that has been fighting the project for years.

Wal-Mart’s plan called for a 100,310-square-foot store on 15 vacant acres owned by the Peterson Cos. adjacent to John Hanson Montessori School on Oxon Hill Road near Indian Head Highway.

Because the county enacted legislation two years ago limiting the size of big-box stores with groceries to 85,000 square feet, Wal-Mart was requesting special permission to build a larger store.

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