In Remington, a wavy blue line marks where one of many ‘Ghost Rivers’ flows underground

Even on a day with no rain, water can be heard flowing underneath Remington at the intersection of West 27th and Fox streets. About 30 to 40 feet below a maintenance hole cover, Sumwalt Run — a creek that once flowed above ground — continues to move through the city’s stormwater sewer system, Baltimore artist Bruce Willen said.