The Southampton History Museum is suing Southampton Town over the rights to a part of historic waterfront property, alleging the town illegally claimed ownership of it to block the eviction of a shellfish hatchery.

The nonprofit museum alleged the town conspired with the hatchery and Suffolk County to alter tax map records, designating Southampton as the owner of 2 of the 5 acres at Conscience Point.

The new tax map was issued by the Suffolk County Real Property Tax Service Agency in April and divides the property into two parcels owned by the museum and town.

The Aug. 13 filing in State Supreme Court in Suffolk County accuses the town of abusing its power for a “land grab.” The filing alleged the town circumvented due process that would have required what’s known as a quiet title acti

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