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Wikipedia:WikiProject U.S. Roads/Washington/List of pre-1964 highways

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[1] has the main sources. [2] appears to be the latest available statutes with the old numbers.

Old New From To Creation and notes
PSH 1 I-5, US 99 British Columbia Oregon 1937 c 190 § 1: British Columbia to Oregon
PSH 1 TR SR 543 British Columbia Blaine (I-5)
PSH 1 AP
Austin Pass Branch
SR 542 Bellingham (I-5) Austin Pass 1937 c 190 § 1: Bellingham to Austin Pass
PSH 1 CD
Chuckanut Drive Branch
SR 11 Bellingham (I-5) Burlington (I-5) 1937 c 190 § 1: Bellingham to Mt. Vernon
PSH 1 AN
Anacortes Branch
SR 536 Mt. Vernon (I-5) Anacortes 1937 c 190 § 1: Mt. Vernon to Anacortes
PSH 1 MA SR 528 Marysville (I-5) East of Marysville (SR 9) 1961 ex.s. c 21 § 1
PSH 1 RE
East Lake Washington Loop
SR 518 Riverton Heights (SR 99) Tukwila (I-5) 1957 c 172 § 2
PSH 1 RE
East Lake Washington Loop
I-405 Tukwila (I-5) Alderwood Manor (I-5) 1957 c 172 § 2
PSH 1 WM US 99 Temp. Foster (I-5) Seattle (SR 509) 1957 c 172 § 2
PSH 1 EP SR 520 Seattle (I-5) Redmond (SR 522) 1961 ex.s. c 21 § 1
PSH 1 I-205 North of Vancouver (I-5) Oregon 1961 ex.s. c 21 § 1
PSH 1 DC
Duwamish Connection
SR 181 Duwamish (SR 99) South Seattle (SR 900) 1963 ex.s. c 3 § 21
PSH 1 Everett South of Everett 1937 c 190 § 1: Everett southwest
SSH 1A SR 9 Lawrence (SR 542) British Columbia 1937 c 207 § 2: Blaine to Bothell, Van Buren to British Columbia
SSH 1A
Wiser Lake Nooksack Branch
SR 544 Nooksack (SR 9) Wiser Lake (US 99 Alt.)
SSH 1A SR 9 Deming (SR 542) Woodinville (SR 522) 1937 c 207 § 2: Blaine to Bothell
SSH 1A Blaine Van Buren 1937 c 207 § 2: Blaine to Bothell
SSH 1B US 99 Alt.
(SR 539)
Bellingham (I-5) British Columbia 1937 c 207 § 2: Bellingham to British Columbia
SSH 1B
Van Buren Branch
SR 546 Lynden (US 99 Alt.) Van Buren (SR 9) was part of 1A
SSH 1C SR 537 Edison (SR 11) Whitney (SR 536) 1937 c 207 § 2: Blanchard to Whitney
SSH 1C
Burlington Branch
Burlington North of Whitney 1937 c 207 § 2: Burlington to Whitney
SSH 1D SR 525 Anacortes (SR 536) Clinton 1937 c 207 § 2: Anacortes to Columbia Beach
SSH 1D
Keystone Branch
SR 113 Southeast of Coupeville (SR 525) Keystone
SSH 1E SR 530 Conway (I-5) Arlington (I-5) 1937 c 207 § 2: Conway to Arlington
SSH 1E SR 530 Arlington (I-5) Darrington
SSH 1F SR 110 Bellingham (SR 11) Bellingham (I-5)
SSH 1F Northwest of Burlington Sedro-Woolley 1937 c 207 § 2: Allen to Sedro-Wolley; became part of PSH 16 (SR 20) in 1961
SSH 1G SR 538 Mt. Vernon (I-5) South of Clear Lake (SR 9) 1937 c 207 § 2: Mt. Vernon east
SSH 1H SR 534 Conway (I-5) McMurray (SR 9) 1937 c 207 § 2: Conway to McMurray
SSH 1I SR 526 Everett (I-5) Mukilteo (SR 525) 1937 c 207 § 2: Everett south
SSH 1I SR 525 Mukilteo Martha Lake (I-5) 1937 c 207 § 2: Everett south
SSH 1J SR 513 North Seattle (I-5) Downtown Seattle (US 10) 1937 c 207 § 2: Seattle north
SSH 1K SR 509 Seattle (SR 99) Des Moines (SR 516) 1937 c 207 § 2: Seattle to (southeast of) Des Moines
SSH 1K SR 516 Des Moines (SR 509) Midway (I-5) 1937 c 207 § 2: Seattle to (southeast of) Des Moines
SSH 1L SR 518 Riverton Heights (SR 99) Sunnydale (SR 509) 1937 c 207 § 2: Renton to Sunnydale
SSH 1L Renton Riverton Heights 1937 c 207 § 2: Renton to Sunnydale
SSH 1M SR 801
(SR 121)
Maytown (I-5) Rochester (SR 8) 1937 c 207 § 2: Tumwater to Rochester
SSH 1N SR 507 Centralia (I-5) Tenino
SSH 1N Centralia Rochester 1937 c 207 § 2: Centralia to Rochester (Lincoln Creek Road and Independence Road), eliminated in 1953
SSH 1P SR 506 Toledo (I-5) Ryderwood 1937 c 207 § 2: Toledo to Ryderwood
SSH 1Q SR 505 Toledo (I-5) Toutle (SR 504) 1937 c 207 § 2: Toledo to Toutle
SSH 1R SR 504 Castle Rock (I-5) Mt. St. Helens 1937 c 207 § 2: Castle Rock to Mt. St. Helens
SSH 1S SR 503 Woodland (I-5) Battle Ground (SR 502) 1937 c 207 § 2: Woodland to Vancouver
SSH 1S SR 502 Battle Ground (SR 503) North of Vancouver (I-5) 1937 c 207 § 2: Woodland to Vancouver
SSH 1T SR 501 Vancouver (I-5) East of Ridgefield (I-5) 1937 c 207 § 2: Vancouver to La Center
SSH 1U SR 503 Battle Ground (SR 502) Orchards (SR 500) 1937 c 207 § 2: Battle Ground to Orchards
SSH 1V SR 509 Tacoma (I-5) Des Moines (SR 516) 1937 c 207 § 2: Tacoma to Des Moines
SSH 1W SR 104 Mountlake Terrace (I-5) Edmonds 1937 c 207 § 2: Edmonds southeast
SSH 1W SR 524 Edmonds (SR 104) North of Bothell (SR 527)
SSH 1X SR 514 Fife (SR 99) Milton (SR 161) 1937 c 207 § 2: through Milton
SSH 1Y SR 532 East Stanwood (I-5) McEachern's Corner
SSH 1Z SR 540 Lummi Indian Reservation Brennan (I-5)
PSH 2 I-90, US 10 Seattle (I-5) Issaquah (SR 900)
PSH 2 I-90, US 10 Issaquah (SR 900) Teanaway (US 97) 1937 c 190 § 2: Seattle via Renton to Idaho
PSH 2 US 97 Teanaway (I-90) Peshastin (US 2) 1937 c 190 § 2: Seattle via Renton to Idaho
PSH 2 US 2 Peshastin (US 97) Spokane (I-90) 1937 c 190 § 2: Seattle via Renton to Idaho
PSH 2 I-90, US 10 Spokane (US 2) Idaho 1937 c 190 § 2: Seattle via Renton to Idaho
PSH 2 RE
Renton Branch
SR 900 Seattle (I-90) Issaquah (I-90) 1937 c 190 § 2: Seattle via Renton to Idaho
PSH 2 BO
Bothell Branch
SR 522 Seattle (US 10) Woodinville (SR 202) 1937 c 190 § 2: Seattle to Snoqualmie Pass
PSH 2 BO
Bothell Branch
SR 522
(SR 202)
Woodinville (SR 202) North Bend (I-90) 1937 c 190 § 2: Seattle to Snoqualmie Pass
PSH 2 AN
Echo Lake Branch
SR 18 West of North Bend (I-90) West of Auburn (SR 99)
PSH 2 Almira Grand Coulee Dam 1937 c 190 § 2: Almira to Grand Coulee Dam
SSH 2A Woodinville North of Kirkland Became part of PSH 1 RE (I-405) in 1963
SSH 2A Renton Everett 1937 c 207 § 3: Renton to Everett
SSH 2B SR 104 Lake Forest Park (SR 522) Mountlake Terrace (I-5) 1937 c 207 § 3: Lake Forest Park northwest
SSH 2C Woodinville Duvall 1937 c 207 § 3: Woodinville to Duvall; Eliminated in 1943
SSH 2D SR 901 Issaquah (SR 900) Bellevue (SR 520) 1937 c 207 § 3: Issaquah to Kirkland
SSH 2E SR 903 Cle Elum (US 97) Cle Elum Lake 1937 c 207 § 3: Cle Elum to Cle Elum Lake
SSH 2F SR 155 Coulee City (US 2) Grand Coulee Dam 1937 c 207 § 3: Coulee City to Grand Coulee Dam
SSH 2G SR 231 Reardan (US 2) Sprague (SR 23) 1937 c 207 § 3: Reardan to Sprague
SSH 2H SR 290 Spokane (US 2) Idaho 1937 c 207 § 3: Spokane to (near) Idaho
SSH 2I SR 131 Virden (US 97) Woldale (I-90) 1937 c 207 § 3: Virden to (southeast of) Teanaway
SSH 2J SR 527 Bothell (SR 522) South Everett (I-5)
SSH 2K SR 906 West of Snoqualmie Pass (I-90) East of Snoqualmie Pass (I-90)
SSH 2M SR 181 Auburn (SR 18) South of Seattle (I-5)
PSH 3 I-90, US 10, US 97 Teanaway (US 97) Ellensburg (I-82) 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 I-82, US 97 Ellensburg (I-90) Union Gap (US 410) 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 US 410
(US 12)
Union Gap (I-82) Dodge (US 295) 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 US 295
(SR 127)
Dodge (US 410) Colfax (US 195) 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 US 195 Colfax (US 295) Spokane (I-90) 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 US 395 Spokane (US 2) British Columbia 1937 c 190 § 3: Cle Elum to British Columbia
PSH 3 I-82 Union Gap (US 410) Oregon
PSH 3 DC
Dodge Clarkston Branch
US 410
(US 12)
Dodge (US 295) Idaho 1937 c 190 § 3: Dodge to Idaho
PSH 3 DC
Oregon to Clarkston Branch
SR 129 Clarkston (US 410) Oregon 1937 c 190 § 3: Clarkston to Oregon
PSH 3 WA
Wallula State Line Branch
US 395 Wallula (US 410) Oregon 1937 c 190 § 3: Wallula to Oregon
PSH 3 WW
Walla Walla State Line Branch
SR 125 Walla Walla (US 410) Oregon 1937 c 190 § 3: Walla Walla to Oregon
PSH 3 ED
Rosalia Pullman State Line Branch
SR 271 Rosalia (US 195) Oakesdale (SR 27) 1937 c 190 § 3: Rosalia to Idaho
PSH 3 ED
Rosalia Pullman State Line Branch
SR 27 Oakesdale (SR 271) Pullman (US 195) 1937 c 190 § 3: Rosalia to Idaho
PSH 3 ED
Rosalia Pullman State Line Branch
US 195 Pullman (SR 27) Southeast of Uniontown (US 95) 1937 c 190 § 3: Rosalia to Idaho
PSH 3 ED
Rosalia Pullman State Line Branch, Genesee Spur Connection
US 95 Idaho Idaho 1937 c 190 § 3: Rosalia to Idaho
PSH 3 CP
Colfax Pullman State Line Branch
US 195 Colfax (US 295) Pullman (SR 27) 1937 c 190 § 3: Colfax to Idaho
PSH 3 CP
Colfax Pullman State Line Branch
SR 270 Pullman (US 195) Idaho 1937 c 190 § 3: Colfax to Idaho
PSH 3
Palouse State Line Branch
SR 272 Palouse (SR 27) Idaho 1937 c 190 § 3: Palouse to Idaho
SSH 3A US 97 Union Gap (I-82) Toppenish (SR 22) 1937 c 207 § 4: Union Gap to Prosser
SSH 3A SR 22 Toppenish (US 97) Prosser (US 410) 1937 c 207 § 4: Union Gap to Prosser
SSH 3B SR 220 Toppenish (SR 22) Fort Simcoe 1937 c 207 § 4: Toppenish to White Swan
SSH 3C South of Union Gap West of Toppenish 1937 c 207 § 4: Union Gap to Toppenish; eliminated in 1957
SSH 3D SR 124 Burbank (US 395) Prescott (SR 125) 1937 c 207 § 4: Touchet to Prescott
SSH 3E SR 125 Walla Walla (US 410) Prescott (SR 124) 1937 c 207 § 4: Walla Walla to Waitsburg
SSH 3E SR 124 Prescott (SR 125) Waitsburg (US 410) 1937 c 207 § 4: Walla Walla to Waitsburg
SSH 3F SR 272 Colfax (US 195) Palouse (SR 27) 1937 c 207 § 4: Colfax to Palouse
SSH 3G SR 193 Colton (US 195) Clarkston (US 410)
SSH 3H
Oakesdale State Line Branch (south of Tekoa)
SR 27 Opportunity (I-90) Oakesdale (SR 271) 1937 c 207 § 4: Opportunity to Oakesdale
SSH 3H
Oakesdale State Line Branch
SR 274 Tekoa (SR 27) Idaho 1937 c 207 § 4: Tekoa to Idaho
SSH 3I South from Spokane via Grand Boulevard 1937 c 207 § 4: Spokane south; eliminated in 1953
SSH 3J SR 231 Chewelah (US 395) Reardan (US 2) 1937 c 207 § 4: Springdale to Long Lake
SSH 3J
Springdale Loon Lake Branch
SR 292 Springdale (SR 231) Loon Lake (US 395)
SSH 3K SR 128 Pomeroy (US 410) Clarkston (US 410) 1937 c 207 § 4: Pomeroy to Clarkston
SSH 3L SR 126 Dayton (US 410) Pomeroy (US 410) 1937 c 207 § 4: Dayton to Pomeroy
SSH 3M Northwest of Thorp Ellensburg 1937 c 207 § 4: Thorp to Ellensburg (Thorp Highway); eliminated in 1953
SSH 3P SR 30 Kettle Falls (US 395) Republic (SR 21)
SSH 3R SR 240 Richland Wye (US 410) Richland (SR 224)
SSH 3R SR 224 Richland (SR 240) Kiona (US 410)
SSH 3S SR 291 Spokane (US 2) Nine Mile Falls
SSH 3T SR 223 Alfalfa (SR 22) Granger (US 410)
SSH 3U SR 232 South of Valley (SR 231) Southeast of Valley (US 395)
SSH 3V SR 241 Sunnyside (US 410) South of Mattawa (SR 24)
PSH 4 SR 21 Wilbur (US 2) Republic (SR 30) 1937 c 190 § 4: Wilbur to Tonasket
PSH 4 SR 30 Republic (SR 21) Tonasket (US 97) 1937 c 190 § 4: Wilbur to Tonasket
SSH 4A SR 21 Republic (SR 30) British Columbia 1937 c 207 § 5: Republic to British Columbia
SSH 4B SR 21 Wilbur (US 2) Lind (US 395) 1937 c 207 § 5: Wilbur to Lind
SSH 4C SR 174 Wilbur (SR 21) Grand Coulee (SR 155) 1937 c 207 § 5: Wilbur to Grand Coulee Dam
PSH 5
Seattle Enumclaw Branch
SR 167 Seattle (SR 900) Auburn (SR 163) 1937 c 190 § 5: Seattle to Yakima
PSH 5
Seattle Enumclaw Branch
SR 167
(SR 164)
Auburn (SR 163) Enumclaw (US 410) 1937 c 190 § 5: Seattle to Yakima
PSH 5
Tacoma Enumclaw Yakima Branch
US 410 Enumclaw (SR 167) Yakima (I-82) 1937 c 190 § 5: Seattle to Yakima
PSH 5 WP
White Pass Branch
SR 14
(US 12)
Southeast of Chehalis (I-5) Northwest of Yakima (US 410) 1937 c 190 § 5: Chehalis to Yakima
PSH 5 TR
Mt. Rainier National Park Branch
SR 7 Tacoma (I-5) Elbe (SR 706) 1937 c 190 § 5: Tacoma to Mt. Rainier
PSH 5 TR
Mt. Rainier National Park Branch
SR 706 Elbe (SR 7) Mt. Rainier 1937 c 190 § 5: Tacoma to Mt. Rainier
PSH 5 EK
Elbe Kosmos Branch
SR 7 Elbe (SR 706) Kosmos (SR 14) 1937 c 190 § 5: Elbe to Kosmos
PSH 5 EF
Tacoma Enumclaw Yakima Branch
US 410 Enumclaw (SR 167) Buckley (SR 165) 1937 c 190 § 5: Enumclaw to Mt. Rainier
PSH 5 EF
Fairfax Branch
SR 165 Buckley (US 410) Mt. Rainier 1937 c 190 § 5: Enumclaw to Mt. Rainier
PSH 5 AT
Sumner Auburn Branch
SR 163
(SR 167)
Auburn (SR 167) Sumner (US 410) 1937 c 190 § 5: Auburn to Tacoma
PSH 5 AT
Tacoma Enumclaw Yakima Branch
US 410 Sumner (SR 163) Tacoma (I-5) 1937 c 190 § 5: Auburn to Tacoma
PSH 5 CP
Ohanapecosh Branch
SR 143
(SR 123)
Cayuse Pass (US 410) West of White Pass (SR 14) 1937 c 190 § 5: Chinook Pass to White Pass
PSH 5 SB
Tacoma Enumclaw Yakima Branch
US 410 Sumner (SR 163) Buckley (SR 165) 1937 c 190 § 5: Sumner to Buckley
PSH 5 ER
Maple Valley Branch
SR 169 Enumclaw (SR 167) Renton (SR 900) 1937 c 190 § 5: Enumclaw to Renton
PSH 5 SR 168 Greenwater River (US 410) American River (US 410)
PSH 5 Auburn Federal Way 1937 c 190 § 5: Auburn to Federal Way
SSH 5A SR 516 Summit (SR 169) Midway (I-5) 1937 c 207 § 6: (south of) Maple Valley to Midway
SSH 5B Auburn Covington 1937 c 207 § 6: Auburn to (south of) Maple Valley (Auburn Black Diamond Road and Kent Black Diamond Road); eliminated in 1963
SSH 5C SR 515 Renton (SR 900) Kent (SR 516) 1937 c 207 § 6: Renton to Kent
SSH 5D SR 161 Puyallup (US 410) Auburn (SR 18) 1937 c 207 § 6: Puyallup to Federal Way
SSH 5E SR 162 Puyallup (SR 161) Buckley (SR 165) 1937 c 207 § 6: Puyallup to Buckley
SSH 5E Orting Electron 1937 c 207 § 6: Orting to Electron
SSH 5G SR 512 Puyallup (SR 161) South Tacoma (I-5) 1937 c 207 § 6: Puyallup to Tacoma
SSH 5H SR 507 Roy Junction (SR 7) Tenino 1937 c 207 § 6: Tacoma to Tenino
SSH 5I SR 510 Yelm (SR 507) Lacey (I-5) 1937 c 207 § 6: Yelm to Tumwater
SSH 5J SR 702 McKenna (SR 507) Northwest of Eatonville (SR 7) 1937 c 207 § 6: McKenna east
SSH 5K SR 508 Morton (SR 7) Napavine (I-5) 1937 c 207 § 6: Morton to Chehalis
SSH 5L SR 141 Morton (SR 7) Riffe (SR 14) 1937 c 207 § 6: Morton to Riffe
SSH 5M Auburn South of Seattle 1937 c 207 § 6: Auburn to Seattle; became SSH 2M in 1959
SSH 5N SR 161 Puyallup (US 410) Eatonville (SR 7)
PSH 6 US 2 Spokane (US 395) Newport (SR 31) 1937 c 190 § 6: Spokane to British Columbia
PSH 6 SR 31 Newport (US 2) British Columbia 1937 c 190 § 6: Spokane to British Columbia
PSH 6
Newport State Line Branch
US 2 Newport (SR 31) Idaho 1937 c 190 § 6: Newport to Idaho
PSH 6 US 2 Newport (US 2) Idaho Now SR 41
SSH 6A SR 294 Tiger (SR 31) Colville (US 395) 1937 c 207 § 7: Tiger to Colville
SSH 6B SR 311 Usk (SR 31) Southwest of Newport (US 2) 1937 c 207 § 7: Usk to Newport
PSH 7 I-90, US 10 Ellensburg (I-82) George (SR 281) 1937 c 190 § 7: Ellensburg to Davenport
PSH 7 SR 281 George (I-90) Quincy (SR 28) 1937 c 190 § 7: Ellensburg to Davenport
PSH 7 SR 28 Quincy (SR 281) Davenport (US 2) 1937 c 190 § 7: Ellensburg to Davenport
PSH 7
Soap Lake Coulee City
SR 17 Soap Lake (SR 28) Coulee City (US 2) 1937 c 190 § 7: Soap Lake to Coulee City
PSH 7
Burke Naylor Cutoff
SR 283 George (I-90) Southwest of Ephrata (SR 28)
SSH 7B Ellensburg Kittitas 1937 c 207 § 8: Ellensburg to Kittitas (Kittitas Highway); eliminated in 1953
SSH 7C SR 26 Vantage (I-90) Washtucna (SR 261)
SSH 7C
Priest Rapids Branch
SR 243 Vantage (SR 26) Southeast of Mattawa (SR 24)
SSH 7E SR 171 Odessa (SR 28) Moses Lake (I-90)
PSH 8 US 830
(SR 14)
Vancouver (I-5) Maryhill (US 97) 1937 c 190 § 8: Vancouver to Yakima
PSH 8 US 97 Maryhill (US 830) Toppenish (SR 22) 1937 c 190 § 8: Vancouver to Yakima
PSH 8 SR 22 Toppenish (US 97) Buena (US 410) 1937 c 190 § 8: Vancouver to Yakima
PSH 8 MA
Maryhill Ferry Connection
US 97 Maryhill (US 830) Biggs Rapids Bridge 1937 c 190 § 8: Maryhill to Columbia River
PSH 8 MK
Kennewick Branch
SR 12
(SR 14)
Maryhill (US 830) Kennewick (US 410)
PSH 8
Paterson to Prosser
SR 221 Paterson (SR 12) Prosser (SR 22)
SSH 8A SR 500 Camas (US 830) Vancouver (I-5) 1937 c 207 § 9: Vancouver to Camas
SSH 8B SR 120
(SR 140)
Washougal (US 830) Prindle (US 830) 1937 c 207 § 9: Washougal east
SSH 8C East of Stevenson Gifford Pinchot National Forest 1937 c 207 § 9: Stevenson to Columbia National Forest (Wind River Road); eliminated in 1961
SSH 8D SR 121
(SR 141)
Underwood (US 830) and White Salmon (US 830) Gifford Pinchot National Forest 1937 c 207 § 9: White Salmon to Columbia National Forest
SSH 8E SR 122
(SR 142)
Lyle (US 830) Goldendale (US 97)
SSH 8E Prosser Paterson 1937 c 207 § 9: Goldendale to Prosser; became part of PSH 8 (SR 221) in 1953
PSH 9 US 410
(SR 8)
Tumwater (US 101) Elma (SR 8) 1937 c 190 § 9: Olympia to Olympia
PSH 9 US 410
(US 12)
Elma (SR 8) Aberdeen (US 101) 1937 c 190 § 9: Olympia to Olympia
PSH 9 US 101 Aberdeen (US 410) West of Olympia (I-5) 1937 c 190 § 9: Olympia to Olympia
PSH 9 PT
Port Townsend Branch
SR 113 Discovery Bay (US 101) Port Townsend 1937 c 190 § 9: Discovery Bay to Port Townsend
PSH 9 EG
Grand Mound Elma Branch
SR 8
(US 12)
Elma (US 410) Grand Mound (I-5) 1937 c 190 § 9: Elma to Centralia
PSH 9 MA
Artic Branch
SR 107 Montesano (US 410) Artic (US 101) 1937 c 190 § 9: Montesano to Artic
SSH 9A SR 112 Port Angeles (US 101) Neah Bay 1937 c 207 § 10: Port Angeles to Sappho
SSH 9B Forks La Push 1937 c 207 § 10: Mora east, La Push east (SR 110); eliminated in 1955
SSH 9C SR 109 Hoquiam (US 101) Queets (US 101) 1937 c 207 § 10: Hoquiam to Copalis Crossing (loop)
SSH 9D SR 108 McCleary (US 410) Kamilche (US 101) 1937 c 207 § 10: McCleary to Shelton
SSH 9E SR 104 Discovery Bay (US 101) Hood Canal Bridge (SR 3) 1937 c 207 § 10: Discovery Bay to Port Ludlow
SSH 9F Sequim Dungeness 1937 c 207 § 10: Sequim to Dungeness; eliminated in 1961
SSH 9G SR 111 Port Angeles (US 101) Olympic National Park
PSH 10
East Wenatchee Quincy Branch
SR 28 Quincy (SR 281) East Wenatchee (US 2) 1937 c 190 § 10: Quincy to Wenatchee
PSH 10 US 97 Olds (US 2) British Columbia 1937 c 190 § 10: Wenatchee to British Columbia
PSH 10 BC
Coulee City Brewster Branch
SR 17 Brewster (US 97) Coulee City (US 2) 1937 c 190 § 10: Brewster to Coulee City
PSH 10 BB
South Bank Branch
SR 173 Brewster (US 97) Bridgeport (SR 17)
SSH 10A SR 155 Omak (US 97) Grand Coulee Dam 1937 c 207 § 11: Omak to Grand Coulee Dam
SSH 10B
Grand Coulee Branch
SR 174 Leahy (SR 17) Grand Coulee (SR 155) 1937 c 207 § 11: Bridgeport to Grand Coulee Dam
SSH 10B SR 172 Sims Corner (SR 17) Farmer (US 2)
SSH 10C SR 150 Chelan (US 97) Manson 1937 c 207 § 11: Chelan to Manson
SSH 10D SR 151 Chelan (US 97) Orondo (US 2) 1937 c 207 § 11: Chelan to Orondo
SSH 10D SR 151
Chelan Wye Connection
South of Azwell (US 97) Chelan Station (SR 151)
PSH 11 US 395 Pasco (US 410) Ritzville (I-90) 1937 c 190 § 11: Pasco to Spokane
PSH 11 I-90, US 10, US 395 Ritzville (US 395) Spokane (US 2) 1937 c 190 § 11: Pasco to Spokane
SSH 11A SR 260 Connell (US 395) North of Mesa (SR 17) 1937 c 207 § 12: Connell to Yakima
SSH 11A SR 24 Yakima (I-82) Othello (SR 26) 1937 c 207 § 12: Connell to Yakima
SSH 11A
Ringold Branch
SR 170 Mesa (SR 17) West of Mesa 1937 c 207 § 12: Connell to Yakima
SSH 11B SR 260 Connell (US 395) Washtucna (SR 26) 1937 c 207 § 12: Dusty to Connell
SSH 11B SR 26 Washtucna (SR 261) Dusty (US 295) 1937 c 207 § 12: Dusty to Connell
SSH 11B SR 261 Washtucna (SR 26) Delaney (US 410)
SSH 11C SR 240 Southeast of Mattawa (SR 24) Richland (SR 224)
SSH 11C Sprague Steptoe 1937 c 207 § 12: Sprague to Steptoe; became part of PSH 18 (SR 23) in 1953
SSH 11D SR 902 Four Lakes (I-90) South of Medical Lake
SSH 11E SR 261 Ritzville (I-90) Washtucna (SR 26) 1937 c 207 § 12: Ritzville to Washtucna
SSH 11F SR 23 Sprague (I-90) Harrington (SR 28) 1937 c 207 § 12: Sprague to Harrington
SSH 11G SR 17 Eltopia (US 395) Soap Lake (SR 28)
SSH 11G
Ephrata Wye
SR 282 Rocky Ford (SR 17) Ephrata (SR 28)
SSH 11H SR 904 Tyler (I-90) Four Lakes (I-90)
SSH 11I SR 170 West of Warden (SR 17) Warden
PSH 12 SR 6 Chehalis (I-5) Raymond (US 101) 1937 c 190 § 12: Chehalis to Kelso
PSH 12 US 101 Raymond (SR 6) Johnsons Landing (US 830) 1937 c 190 § 12: Chehalis to Kelso
PSH 12 US 830
(SR 4)
Johnsons Landing (US 101) Kelso (I-5) 1937 c 190 § 12: Chehalis to Kelso
PSH 12 JM
Johnsons Landing to Megler
US 101 Johnsons Landing (US 830) Oregon 1937 c 190 § 12: Johnson's Landing to Megler
PSH 12
Skinville Cutoff
US 101 Alt. Northeast of Ilwaco (US 101) East of Ilwaco (US 101) 1937 c 190 § 12: around Ilwaco
PSH 12 LB
Longview Branch
SR 832
(SR 432)
Longview (US 830) Longview Wye (I-5) 1937 c 190 § 12: Longview to Kelso
PSH 12
North Connection in Kelso
SR 831
(SR 431)
Kelso (US 830) North Kelso (I-5)
PSH 12 SR 833
(SR 433)
Longview (SR 832) Oregon
SSH 12A SR 103 Seaview (US 101) Ocean Park 1937 c 207 § 13: Seaview to Ocean Park
SSH 12B SR 401 Megler (US 101) Naselle (US 830) 1937 c 207 § 13: Megler to Naselle
SSH 12C SR 403 Grays River (US 830) Altoona 1937 c 207 § 13: Grays River south
SSH 12C North of Altoona Eden 1937 c 207 § 13: Eden west
SSH 12D SR 407 Cathlamet (US 830) State Camp 1937 c 207 § 13: Cathlamet northeast
SSH 12E SR 603 Claquato (SR 6) Toledo (I-5) 1937 c 207 § 13: Chehalis to Toledo
SSH 12F SR 409 Cathlamet (US 830) Puget Island
SSH 12G SR 402 Grays River Pe Ell
SSH 12H SR 411 Kelso (US 830) Vader (SR 506)
PSH 13 US 101 Raymond (SR 6) Aberdeen (US 410) 1937 c 190 § 13: Raymond to Aberdeen
SSH 13A
Raymond Branch (south of Twin Harbors State Park)
SR 105 Raymond (US 101) Westport 1937 c 207 § 14: Raymond to Westport
SSH 13A SR 105 Aberdeen (US 101) Twin Harbors State Park (SR 105) 1937 c 207 § 14: Aberdeen to Westport
PSH 14 SR 16 Gorst (SR 3) Port Orchard (SR 160) 1937 c 190 § 14: (north of) Shelton to Gig Harbor
PSH 14
Harper Branch
SR 160 Port Orchard (SR 16) Point Southworth 1937 c 190 § 14: Port Orchard to Harper
PSH 14 PT SR 16 Port Orchard (SR 160) Tacoma (SR 509) 1937 c 190 § 14: (north of) Shelton to Gig Harbor
PSH 14 Union Gorst 1937 c 190 § 14: (north of) Shelton to Gig Harbor
SSH 14A
Purdy Branch
SR 302 Purdy (SR 16) Allyn (SR 3)
SSH 14A SR 3 Allyn (SR 302) Belfair (SR 106) 1937 c 207 § 15: Belfair to Shelton
SSH 14A SR 3 Allyn (SR 302) Shelton (US 101) 1937 c 207 § 15: Belfair to Shelton
SSH 14B Purdy Allyn 1937 c 207 § 15: Purdy to Allyn; became part of SSH 14A (SR 302) in 1955
SSH 14C Gig Harbor Point Fosdick 1937 c 207 § 15: Gig Harbor south; became part of PSH 14 PT in 1939
PSH 15 US 2 Peshastin (US 97) Everett (I-5) 1937 c 190 § 15: Peshastin to Everett
PSH 15 BM SR 202
(SR 522)
Monroe (US 2) Woodinville (SR 522)
SSH 15A SR 204 Everett (US 2) Lake Stevens (SR 9) 1937 c 207 § 16: Everett to Granite Falls
SSH 15A SR 92 North Lake Stevens (SR 9) Granite Falls 1937 c 207 § 16: Everett to Granite Falls
SSH 15B SR 203 Monroe (US 2) Fall City (SR 522) 1937 c 207 § 16: Monroe to Fall City
SSH 15C SR 209 Leavenworth (US 2) Lake Wenatchee State Park (SR 207) 1937 c 207 § 16: Leavenworth to Winton
SSH 15C SR 207 Lake Wenatchee State Park (SR 209) Winton (US 2) 1937 c 207 § 16: Leavenworth to Winton
SSH 15D SR 207 Lake Wenatchee State Park (SR 209) Telma 1937 c 207 § 16: Lake Wenatchee to Telma
PSH 16 SR 153 Pateros (US 97) Twisp (SR 20) 1937 c 190 § 16: Pateros to Barron
PSH 16 SR 20 Twisp (SR 153) Mazama 1937 c 190 § 16: Pateros to Barron
PSH 16 SR 20 Mazama Avon (SR 536)
PSH 16
Loup Loup Branch
SR 20 Twisp (SR 153) Okanogan (US 97)
PSH 16 SR 20 Southwest of Okanogan (SR 20) Malott (US 97)
PSH 16 Mazama Barron 1937 c 190 § 16: Pateros to Barron
SSH 16A SR 20 Okanogan (SR 20) Omak (US 97)
PSH 17 Marblemount Mazama 1937 c 190 § 17: Twisp to Marblemount; became part of PSH 16 (SR 20) in 1961
PSH 17 Stehekin East of Marblemount 1937 c 190 § 17: Stehekin northwest
SSH 17A Marblemount Sedro-Woolley 1937 c 207 § 17: Marblemount to Sedro-Woolley; became part of PSH 16 (SR 20) in 1961
PSH 18 I-90, US 10 George (SR 281) Ritzville (US 395) 1937 c 190 § 18: Burke to Ritzville
PSH 18 SR 230 Ritzville (I-90) Ewan (SR 23)
PSH 18
Sprague Ewan Steptoe Branch
SR 23 Ewan (SR 230) Steptoe (US 195)
PSH 18
Sprague Ewan Steptoe Branch
SR 23 Ewan (SR 230) Sprague (I-90)
PSH 21 SR 106 Union (US 101) Belfair (SR 3)
PSH 21 SR 3 Belfair (SR 106) Gorst (SR 16)
PSH 21 SR 3 Gorst (SR 16) Hood Canal Bridge (SR 104) 1937 c 190 § 19: Kingston to Port Orchard
PSH 21 SR 104 Hood Canal Bridge (SR 3) Kingston 1937 c 190 § 19: Kingston to Port Orchard
PSH 21
Navy Yard Branch
SR 304 Bremerton (SR 3) Bremerton Ferry Terminal
PSH 21
Keyport Branch
SR 303 Keyport West of Keyport (SR 3) 1937 c 190 § 19: Keyport west
SSH 21A SR 305 Poulsbo (SR 3) Winslow 1937 c 207 § 18: Poulsbo to Port Blakely
SSH 21B SR 303 Keyport Bremerton (SR 304) 1937 c 207 § 18: Keyport to East Bremerton
SSH 21B
Illahee State Park Branch
SR 306 Bremerton (SR 303) Illahee State Park
SSH 21C SR 300 Belfair (SR 3) Belfair State Park
PSH 22 SR 25 Davenport (US 2) British Columbia 1937 c 190 § 20: Davenport to Kettle Falls, Kettle Falls to British Columbia
SSH 22A SR 251 Northport (SR 25) British Columbia 1937 c 207 § 19: Northport to British Columbia
Mount Spokane Park Drive SR 206 North of Spokane (US 2) Mount Spokane State Park

Other branches in 1960:

  • PSH 1 Everett Loop: Evergreen Way and 41st Street? from SR 99 (PSH 1) to Broadway (PSH 1)
  • PSH 1 Marysville Spur: SR 529 from I-5 (PSH 1) north of Everett to Ebey Slough?
  • PSH 1 D Street Connection in Blaine: D Street and I-5 from SR 543 (PSH 1) to Canada
  • SSH 1I Mukilteo Ferry Spur
  • SSH 1W Edmonds Ferry Spur
  • SSH 2D Redmond Spur, SSH 2D to PSH 2 in Redmond
  • PSH 3 Pasco Spur: US 395 and I-182 from Lewis Street (PSH 3) to 4th Avenue (PSH 11)
  • SSH 10B Crown Point Spur
  • SSH 13A Tokeland Branch
  • PSH 14 Manchester Branch: Harper Branch to Manchester
  • PSH 15 Skykomish Connection: new PSH 15 to old PSH 15 in Skykomish
  • PSH 21 Lofall Ferry Connection: PSH 21 to Lofall South Point Ferry
  • SSH 21B Warren Avenue Route: PSH 21 Navy Yard Branch to SSH 21B via Warren Avenue Bridge