to Columbia Ridge, a major landfill that serves Portland and Seattle, and the John Day Fossil Beds National Monument. From Arlington, I-84 runs northeast along the edge of the Shepherds Flat Wind Farm, the second-largest wind farm in the United States, and intersects OR 74 at Willow Creek. After reaching Morrow County, the terrain opens into wide rangelands, including the Boardman Naval Weapons Training Facility that the freeway passes to the north and a poplar tree farm planted in rows for along the lanes and considered a scenic sight and a community fixture. I-84 continues through the city of Boardman and turns southeast, leaving the river to intersect US 730 and pass under the Umatilla Army Depot, which is planned to be redeveloped into industrial land and a wildlife refuge. At the southeast corner of the Army depot near Hermiston in Umatilla County, I-84 intersects the southern terminus of I-82, a freeway connecting northeastern Oregon to Washington's Tri-Cities, Yakima, and I-90. The freeway goes on to intersect OR 27 south of Hermiston and US 395 near Stanfield, forming a concurrency with the latter. From Stanfield, I-84, US 30, and US 395 continue southeast along the Umatilla River and the old Oregon Trail to Pendleton, which lies in a valley formed by the river. West of the city, near the Eastern Oregon Regional Airport, US 30 leaves the concurrency to run through downtown on city streets. After passing the Eastern Oregon Correctional Institution and crossing the river, US 395 splits from I-84 at Southgate, heading south towards John Day. I-84 continues around the south edge of Pendleton and intersects OR 11, a connecting highway to Walla Walla, Washington, before being rejoined by US 30. The freeway travels southeast through a portion of the Umatilla Indian Reservation, passing the on-reservation resort casino, and begins its ascent into the Blue Mountains. The easternmost of I-84 includes several sharp curves and steep grades, along with winter weather that causes frequent closures and collisions. The westbound and eastbound lanes are split by a wide median for as I-84 climbs up a series of switchbacks on Cabbage Hill (also known as Emigrant Hill), which have a maximum grade of 5 to 6 percent. This section of the freeway also has an additional passing lane for uphill travel, runaway truck ramps on descending slopes, chain-up zones, water refills for truck radiators, and variable-message signage for weather conditions.