The Arid Land Ecology Reserve is the largest track of shrub-steppe ecosystem remaining in Washington state. It is managed for the U.S. Department of Energy by the Pacific Northwest National Laboratory (which is operated for the U.S. Department of Energy by Battelle Memorial Institute). The 320 km² area is a portion of the 1500 km² National Environmental Research Park located on the Hanford Site on the northwest boundary of Richland, Washington. Official language(s) None Capital Olympia Largest city Seattle Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 18th 184,824 km² 385 km 580 km 6. ... The United States Department of Energy (DOE) is a Cabinet-level department of the United States government responsible for energy policy and nuclear safety. ... The Pacific Northwest National Laboratory (PNNL) is a one of nine United States Department of Energy multiprogram national laboratories. ... The Battelle Memorial Institute is a private, not-for-profit applied science and technology deveopment company headquartered in Columbus, Ohio. ... Hanford Site during the Manhattan Project. ... Richland Police Station in foreground. ...