State Route 401 (SR 401) is a 12.13-mile (19.52 km) long state highway in Pacific County within the U.S. state of Washington. The highway originates at the north end of the Astoria–Megler Bridge west of Megler at an intersection with U.S. Route 101 (US 101). The roadway travels northeast, paralleling cliffs, the Columbia River and the South Fork of the Naselle River to Naselle, ending at SR 4. The road was designated Secondary State Highway 12B (SSH 12) between 1937 and 1964, when SR 401 was created to replace SSH 12B. The Astoria–Megler Bridge, completed in 1966, replaced a ferry east of the bridge, where the highway originally ended, and is known locally as Kingston Ferry Road. The roadway was extended west to the north end of the bridge, where it currently terminates. The former ferry terminal became the Dismal Nitchrest area, named after the Lewis and Clark Expedition's description of the place.
Route description
SR 401 originates at an intersection with U.S. Route 101 (US 101) at the north end of the Astoria–Megler Bridge west of Megler and southeast of McGowan. Traveling northeast between cliffs and the Columbia River past the Dismal Nitch Safety rest area to Knappton,[1] the highway turns north along more cliffs and the South Fork of the Naselle River. In Naselle, the South Fork merges with the Naselle River, which the roadway crosses over three times before terminating at SR 4.[3][4][5] The intersection with SR 4 is also the busiest segment of the road with an estimated daily average of 2,800 motorists,[6] which has been decreasing from 3,100 motorists in 2005.[7]
^Washington State Highways, 2008–2009(PDF) (Map) (2008–09 ed.). 1:842,000. Cartography by United States Geological Survey. Washington State Department of Transportation. 2008. § G2. Retrieved August 23, 2009.
^Pacific Northwest: Washington, Oregon, Western Idaho, Southwestern British Columbia (Map) (6th ed.). 1 inch = 7.5 miles. The Thomas Guide. Cartography by NAVTEQ. Thomas Bros., Rand McNally. 2004. p. 186. ISBN0-528-99511-1.
^Washington State Department of Transportation (2008). "2008 Annual Traffic Report"(PDF). Archived from the original(PDF) on June 16, 2010. Retrieved August 23, 2009.
^Washington State Department of Transportation (2005). "2005 Annual Traffic Report"(PDF). Archived from the original(PDF) on June 16, 2010. Retrieved August 23, 2009.
^Washington State Legislature (March 18, 1937). "Chapter 207: Classification of Public Highways". Session Laws of the State of Washington (1937 ed.). Olympia, Washington: Washington State Legislature. pp. 1008–1009. Retrieved August 23, 2009. (b) Secondary State Highway No. 12B; beginning at Megler on Primary State Highway No. 12, thence in an easterly and northerly direction to a junction with Primary State Highway No. 12 in the vicinity north of Naselle.
^C. G. Prahl (December 1, 1965). "Identification of State Highways"(PDF). Washington State Highway Commission, Department of Highways. Archived from the original(PDF) on October 30, 2008. Retrieved August 23, 2009.
^United States Geological Survey (1968). Hoquiam, 1968 (Map). 1:250,000. University of Texas at Austin. Retrieved August 23, 2009.