 The material dredged from the river would be used to build up the flats and turn them into dry land, eliminating the public health dangers they caused.Most of the reclaimed mudflats were subsequently declared to be parkland and named Anacostia Water Park (now Anacostia Park) in 1919.The original dredging plan called for a channel wide on the Anacostia's west bank from the 11th Street Bridges to Massachusetts Avenue SE, narrowing to a wide channel from Massachusetts Avenue SE to the Maryland-District border line.