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Ellicott's report described the marker stones and contained a map that showed the boundaries and topographical features of the Territory of Columbia. The map identified the locations within the Territory of the planned City of Washington and its major streets, as well as the location of each boundary marker stone. [2] [15]
State Route 20 (SR 20), also known as the North Cascades Highway, is a state highway that traverses the U.S. state of Washington.It is the state's longest highway, traveling 436 miles (702 km) across the northern areas of Washington, from U.S. Route 101 (US 101) at Discovery Bay on the Olympic Peninsula to US 2 near the Idaho state border in Newport.
US 101 enters Washington on the Astoria–Megler Bridge, a 4.1-mile (6.6 km) bridge connecting Astoria, Oregon, to Megler, Washington, over the Columbia River near its mouth. It is the longest continuous truss bridge in North America and among the longest of its kind in the world. [ 11 ]
All state highways are designated by the Washington State Legislature and codified in the Revised Code of Washington (RCW), namely Chapter 47.17 RCW. These routes are defined generally by termini and points along the route; WSDOT may otherwise choose the details, and may bypass the designated points as long as the road serves the general vicinity.
State Route 410 (SR 410, partially named the Chinook Scenic Byway, and also named the Stephen Mather Memorial Parkway) is a 107.44-mile (172.91 km) long state highway that traverses Pierce, King, and Yakima counties in the US state of Washington.
State Route 14 (SR 14) is a 180.66-mile-long (290.74 km) state highway in the U.S. state of Washington. The highway travels east-west on the north side of the Columbia River, opposite Interstate 84 (I-84) to the south in Oregon. SR 14 forms a section of the Lewis and Clark Trail Scenic Byway and begins at an interchange with I-5 in Vancouver.
The Washington state highway system was changed to its current "sign route system" beginning in January 1963 with a state highway renumbering. [63] Under the new system, Interstate highways, U.S. routes, and state routes replaced the primary and secondary highways and were codified under the Revised Code of Washington in 1970. [3]
The project was finished on August 17, 2006, and improved a 32-mile (51 km) segment near Blewett Pass, a 18-mile (29 km) section in the Colville Indian Reservation and a 20-mile (32.19 km) segment between Riverside and Oroville. [52] [53] Prior to October 5, 2006, US 197, an auxiliary route of US 97, ended at US 97, co-signed with SR 14, in ...