Primary State Highway 3 (Washington)
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| Primary State Highway 3 |
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| Inland Empire Highway | |||||||||||||
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| Existed: | 1937 – 1964 | ||||||||||||
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| West end: |    PSH 2/US 10/US 97 near Cle Elum |
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| East end: | BC 395 at Canadian border | ||||||||||||
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Primary State Highway 3, the Inland Empire Highway, was a highway in the state of Washington, U.S.A., from 1937 to 1964. Beginning near Cle Elum, the Inland Empire Highway took a long, curved route through Yakima and the Tri-Cities in south central Washington before turning north and following the Washington-Idaho state line, crossing through Spokane from south to north, and finally terminating at the Canadian border near Grand Forks, British Columbia.
PSH 3 was originally established as "State Road No. 3" by the state legislature in stages between 1907 and 1915.[1] State Road No. 3 would later share its routing with portions of four auto trails:
- Between Cle Elum and Spokane, the road was part of the original southern routing of the Yellowstone Trail.
- Between Toppenish and Spokane, the road was part of the Theodore Roosevelt International Highway.
- Between Toppenish and Dodge, the road was part of the Evergreen Highway.
- Between Dodge and Spokane, the road was part of the California Banff "B" Line.
State Road No. 3 was designated Primary State Highway 3 by the state legislature when it created the primary and secondary state highways systems in 1937. Over the next 27 years it would be overlapped with no fewer than six U.S. Highways over its route: US 10, US 97, and US 410 on different parts of the east-west leg; and US 195, US 295, and US 395 on different parts of the north-south leg.
Highways in Washington were renumbered in 1964, and PSH 3 was removed from the state highway system. Today, PSH 3 between Cle Elum and Ellensburg is part of Interstate 90; between Ellensburg and Kennewick, Interstate 82; between the Tri-Cities and Dodge, US 12; between Dodge and Dusty, SR 127; between Dusty and Colfax, SR 26; between Colfax and Spokane, US 195; and between Spokane and the Canadian border (and for a short distance in the Tri-Cities), US 395.
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[edit] Secondary State Highways
PSH 3 had 19 designated secondary branches; see secondary state highways as branches of Primary State Highway 3.
