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State Route 21 (SR 21) is a long state highway in the U.S. state of Washington that traverses four counties: Franklin, Adams, Lincoln and Ferry. The highway extends from an intersection with in Kahlotus north through Lind, Odessa, Keller, Republic and Curlew before becoming (BC 41) at the Canadian border in Danville. SR 21 is concurrent with (US 2) in Wilbur and in Republic and has two diamond interchanges: at in Lind and (I-90) south of Odessa. Between Lincoln and Ferry counties, the roadway crosses Franklin D. Roosevelt Lake on the Keller Ferry, operated fare free by the Washington State Department of Transportation (WSDOT) and the Department of Highways (DoH) since 1930. Since 1899, at least one segment of the current highway has been in the state highway system. In 1899, the Marble Mount Road was established and later numbered in 1905 and renamed to the Sans Poil-Loomis Road in 1907. In 1915, a branch to the Canadian border was added to the highway, but was removed in 1923. In 1937, the Primary state highways were established and State Road 4 became (PSH 4), while the former Canadian branch became Secondary State Highway 4A (SSH 4A). Another highway, extending from Lind to Wilbur, became SSH 4B. In 1964, PSH 4 was split into SR 20 and SR 21 while SSH 2A and SSH 2B also became SR 21. In 1983, a road between Lind and Kahlotus became part of SR 21. The Keller Ferry, which travels across the Columbia River at Franklin D. Roosevelt Lake to connect the two segments of SR 21, was originally a cable ferry operated in the early 1890s. J.C. Keller, founder of Keller, purchased the ferry in 1899 and traded ownership to Lincoln and Ferry counties in 1925. In 1929, the two counties unveiled a new eight-car cable ferry, named the ''Keller of Seattle'', which served the two counties until 1930, when the predecessor of the current WSDOT, the DoH, purchased the ferry, but still operated ''Keller of Seattle'' until replacing it with the ''L.A. McLeod'' in 1939. In 1944, the ''Ann of Wilbur'' tugboat and ''Sanpoil'' barge acted as a ferry before a new replacement, the ''Martha S.'' was launched in 1948. The ''Martha S.'' has been in continual operation since 1948 and WSDOT planned to replace the ferry in the near future, but funding came $5.5 million US$ short. The ferry was suspended in early October 2009 after a leak was found in the hull of the ''Martha S.'' ==Route description== SR 21 originates at an intersection with , about east of the northern terminus of ;〔 both intersections are in the city of Kahlotus, which is located in a narrow valley near several coulees in Franklin County. After leaving Kahlotus as the Lind–Kahlotus Road, the highway turns northeast and later west as it passes over the Sand Hills Coulee four times. Curving due north, the roadway leaves Franklin County to enter Adams County. Passing farmland in the flat landscape, SR 21 intersects and continues through an unnamed coulee to intersect Smart Road. Smart Road was the former alignment of SR 21 prior to the (US 395) interchange being built. SR 21 intersects US 395 in a diamond interchange east of Downtown Lind. From the interchange, the highway travels west and intersects Smart Road again before crossing over the Centennial Trail and entering Downtown Lind. In Downtown, the roadway is named Second, I and First Streets and serves as the main connector to other areas. After turning north to leave Lind, the road encounters the John Wayne Pioneer Trail and more plains before intersecting the pre-interstate alignment of (I-90) and interchanging with I-90 at exit 206, another diamond interchange. North of the interchange, SR 21 travels through more plains and a coulee to leave Adams County and enter Lincoln County. In Lincoln County, the highway travels through farmland to encounter Odessa as Division Street, intersecting . The roadway turns northwest at Pacific Lake and reverts northwards into farmland. After temporarily turning east into more farmland, the road enters Wilbur, named Bruce Avenue. In Wilbur, SR 21 turns west, concurrent with , for before branching off north to intersect and leave Wilbur towards dense forests. North of Wilbur, the roadway approaches Speigle Canyon and makes several turns before exiting the canyon and nearing Franklin D. Roosevelt Lake; at , the lake is the largest in Washington. Paralleling the lake, the road then uses the Keller Ferry, a long boat used as a fare-free ferry across Franklin D. Roosevelt Lake, part of the Lake Roosevelt National Recreation Area, operated by the Washington State Department of Transportation (WSDOT) and its previous counterparts since 1930.〔(【引用サイトリンク】title=State Ferries in Eastern Washington )〕 The ferry travels across the Lincoln County line to enter Ferry County, named after Elisha P. Ferry, the first Washington governor, southwest of Keller in the Colville Indian Reservation. Traveling northeast, between the Sanpoil River and the southern end of the Okanagan Highlands, SR 21 passes Keller and continues inland into the Columbia Mountains on the banks of the river. The river forms a canyon that the highway passes through and eventually both the river and road leave the Colville Indian Reservation. Shortly after leaving the reservation, the roadway enters Republic and becomes concurrent with for before exiting the concurrency and Republic. Between Republic and the Canadian border, an estimated daily average of 1,600 motorists used this segment of SR 21, making this section the busiest. The daily average has declined since 2006 and 2007, when a daily average of 1,700 motorists utilized the segment. Northeast of Republic, the highway passes Curlew Lake, the Curlew Lake State Park and the communities of Malo and Curlew.〔(【引用サイトリンク】title=Republic, Washington: Curlew State Park )〕 After passing through more dense forests, the roadway enters Danville, where SR 21 crosses the Canadian border into British Columbia as (BC 41).〔〔〔 BC 41 continues north to end at southwest of Grand Forks, BC. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Washington State Route 21」の詳細全文を読む スポンサード リンク
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