 The Julington-Durbin Preserve is in the county that has a 2010 population of what?
Julington-Durbin Preserve: The Julington-Durbin Preserve is a 2,031-acre nature preserve operated by the St. Johns River Water Management District in Duval County, Florida. Duval County, Florida: Duval County is a county located in the State of Florida. Duval County, Florida:  As of the 2010 census, the population was 864,263, with a 2016 estimate at 926,255.
i don't know