A LAWSUIT OVER RIVERSTONE’S VANISHED LEVEE More than 400 residents of Fort Bend County’s Riverstone development — between Hwy. 6 and the Brazos River — are suing the engineering firm that designed their stormwater systems, alleging that the design left one portion of the community flooded by the runoff from the other during Harvey. The roughly 3,700-acre area is divided into 2 Levee Improvement Districts — LID 19 (shaded blue on the map) and 15. “It became very clear when we passed into LID 15 that something was not right,” one LID 19 homeowner said in a press conference. “We were inundated with water in our neighborhood, and just on the other side of the street everything seemed to be perfectly fine.” Both LIDs were designed by Costello, Inc. the company founded by Houston’s flood czar Steve Costello. (He’s said he divested from it in 2015.) That firm’s failure to consider what would happen when a levee that ran between the 2 districts — along Hagerson Rd. — was removed is what downstreamers say is to blame for much of their soggy state. In total, reports the Chronicle’s Rebecca Elliott, about a third of the 1,760 homes in LID 19 flooded. [Houston Chronicle] Map of Riverstone LIDs 15 and 19: Riverstone LIDs