Joint laireettgation of An Sateerstate foidlge Across tho Columbia Blver between Portland^ Oregon end Vancouver Vlolnity, laehington Prepared under the director of Vhe Oregon State Eighsray Department and The Washington Department of HighutE^rs \^S\ tteaoewtsttiHtsweaseewiitwsiwiSBmiissaes oitesBMiiMBsmi«ese»»imgewHHH»N«Htoo The Oregon The Waehlngton State Bli^way Departmsot Department of Bi^heaye B« BaXdo0k| State Ei^n^ Engineer W* A. Bngge, Director of Hghwaye % 0* WlXXiaoiei Assists^ ^te 0» E» Dlnsmore^ Assistant Director Highway Engineer of Blgheaye C» Smithy ConetrueUon Shglneer Ceo* StevenBi Bridge Engineer 6| S. Ikseon^ Bridge ^^iginoer H* 0* l^gginsi Traffie ^iglneer B# CbmndalXf Q^afflo Englnoer V. J* MeH^f District &igineer % Ma ^tby Ps^oipaX liOOation Engr* fi* G« Porak^ Associate ffllgtcmy Engr* Washington Stue {^apartment of"Darmponw®' Ubrary TABLE OF C»BTMTS Sabjeet Fag© X« Foreword 2* Growth and BereXoiaaent 3* Bdsoriptlott of Esiatisig Bridge Urn TTaffio Volmses 5* Traffic Delays 6* Practical Oapacity and Peak Folmaes 7* Field Xavestlgetlones- (a) Boot© Bo* I 82nd Ave« (b) Honte Bo« 2 — 39*^ Ave« (c) Rout© Ho* 3 ~ Znterati te Bridge via Interstate Ave« (d) Bonte Ho. 3 Alt. via Belawar© Avo. (e) Kottte Ho. A - Golmbla ^ver Timnele (f) Bottte So. 5 via St. ^ohnci 8. Table IF Bstlisatoo - Columbia Blver Bridgoo 9* Table F Estimates - Oregon Approaches 10* Table FX Estimates - Washington Approaches 11. Table FIX Composite Estimates - Bridges and Apjsroaohes 12. Avertable and ^snorated Traffic 13« Boslre linos of travel M. Conclusions Chraplis and Plans Pig 1 Flolnlty Hap showing Highways Jig 2 Flclnlty Sap showing proposed Routes Fig 2A Ifep of Oregon Approactee Jig 3 Population trend to 1970 Fig 4. frai^fle Fol^ca© firend Page Fig 5 Srldgd S3.er7;&tioxi Route X Fig 6 Bridge SXeTetlon Route % %t 3 Flg7 Route 4 TouneX ProfiXa end geotloB Fig 8 Route 5 - Bridge EXevatioa Fig XO Route X - Oregon Approach - 82nd Are •Frof IX© Fig XX Route X - Washington Approach * PSH ^8 - tSap and Xnteroheaga £Xg 13 Route X - W^hlngtoB Approach 39th Are* BkI* S£ap 1 Fig 14 Route X Washlngtoa Approach «* PSH #8 ProfiXe Fig X$ Route 1 - Waehiugton Ar preach - 39th Aue# Bxt# ProfiXe | Fig 17 Route 2 - Oregon Appsroach - 39th Ave# Profile Fig 19 Route 3 - Oregon Approach via Xnterotnte - Profile Fig 2X Route 3 - Oregon Approach via BeXceare ProfiXe Fig 22 Route 3 - Waahlngtoa Approach PSH #X thru Fanceuver Efep Fig 23 Route 3 - Waahingtoa Aj^jronch PSB #l thru Vaaeouver Profile Fig 24 Route 3 - Wachingtcoi Approach Conneetlcn to Interstate Bridge Fig 30 Route 5• Orogoa Approach vis St* Johae- Profile Fig 31 Route 5 fachlngtcn Approach - OoXusshla River to Woodland*- Hap | Fig 32 Route 5 Baahlngton Approach * CoXisiihla River to Woodland^ ProfiXe fahXo X Troffie Foluine ly cXacseo of Fehlolec «> Ai^ 1949 Fable IX traffic Bolaye 7abl© XII Projected AAB and ElshcBt hour Folmes Fable X9 RstiisateB OoXuotbla River ^eelnge fabJi 7 Eetijsatee Oregon Approsuhcc Fable FX Betleigioe - Hhohlagtoa Approach©^ Table VH ^lapooit© Bstlsiatee - iteldgea and Approaches ^abXe fill diverted s^ad Eepected Traffic FOBSWOHB fhlfl ie a report ©f tha Joint lurestlgatioii ty tbo Bl^^ay Bepartasata of the States of Oregon and Washington of the Xooatlcm and feaelhiXlty of a etrocrtnre aeroes the OoXuahla River hatttees Portland^ Oregon and ^anooaver^ Washington vlolnlt|r to reliove the ccmgestod eomditlon of vehleuXar traffic 00. the essietlng intoret to Bridge and to provide an ade^oate faeiXl^ for present and ftxture traffic hetveen the two centers* Xn cimjnnctlon with l^ls report^ reference chouXd he node to the foXXow-> lag studies and reports td&loh have famished the necessaxy tooXs and data used in arriving at the c^dnsion preoented in this reports ^ y (X) Origin and Beetination Traffic Purvey of V^ancenvor^ Washingt^ dmidncted hy State of Oregon and State of Washington EUghoey Planning Sor^^aye* (2) ^Origin and Bastlnatioa,Traffic Surrey of Portland HetropoHtaa Area •»» X9A6^« Conducted hy tho Oregon State Highway Bepartaaent-^ Teohttle&l Report Bo« (3) ©Bovloe of CoXmhla Elver Greeslng Traffic and FaclXltics^i pri^» par^ ly the State of Bashlngt^f Bepartaent of KlghTmy6> ©rteai SectioBi Office of Traffic Saiglneer ^aauary X950f herelxanfter referred to as the "1950 Eovtre©# (X) Report on TToxie-OoXinQbla Blver Baterstate Bridge Studies^ l^b- Xlshad by the Oregim State Hlghroy Coesmla Ion February X944i fechnlcal EuXXetln So* 16* s 2 I I I M £ t! a 11 5 I $ I I ^ 2 I I I ^ 5 7^ ^ 'S a I After tJie wssp^ tdii tiis cloaiBg of car Jjaduatilca may of -Qso ^^arkora^ with fandllos, £ik»v^ awa^ shout aB&»^xird of tho wax^tiEG saigration reaaaincd ia Vaac^iivQap# ISiIq proTid^ a nm soarea of ialw asid housing facilities at'br&cted a coasidorable eKpaaaicixi ptrograci for hoih induatrlaX and retail actixdt^ to servo icucroaec^ ^mde* lb the north md eaat of ^aneoimsr lioa a f(3rtll@ farmlag eoSiHitii^ ly tio^r reaeurcoa. dty la the pariLsoipal gatoso^ for hi^my ^pavol to the state of \7aeMaigtoa rro!3 the smjth» fso is^port^Eit liS»S» aaabert^ pass through Vazi03Uvor| 99 oad ll*S. @30 (Sgo X)* His foUodUsg is a ree^ituXation of the poimXatica growth of Fos^tXaad and Vancottwor tsm I8@0 to 1950* (FigtEres froa ®X946 - PortXaad Motro- poXlton Area 'Srofflc Sttrvey and froia PreXXoiaer^ X950 Censue £igua?Gs)» PopoXstioB Statistlo© teas Paetlanil FgnctsissBr 1860 2(764 X670 6(293 — 1880 t7,9f7 1,722 1890 46(365 3,345 19t» ^t4a6 3,126 1910 9,300 1920 ss^^asa 12,637 193) 301,0X5 15,766 1940 305,394 10,7^3 1950 m,oix 41,449 Popalatioa fsOTd to XWlfO is shoraa in Fig* III* fig* HI* FopiXatioa fTesid Fop^tian (tov© Fro|ected to 1970 70 « 60 o z < CO 50 3 O X 40 - 30 z o 20 t- 4 3 10 a o 0. n YEAR I860 1870 1880 1890 1900 1910 1920 1930 1940 1950 I960 1970 CITY OF VANCOUVER 500 450 400 350 300 n O * 250 4 (A 3 O 200 z ISO 100 o K 4 J 50 3 O. o 0. YEAR I860 1870 1880 1890 1900 1910 1920 1930 1940 1950 I960 1970 CITY OF PORTLAND Figure HI. POPULATION TRENDS & -v- a & s r 3 1 a I 5 1 I f U 0 I f $ ^0^ fepldgoa Qp©goa aad Colombia sloops are sts^ slrdea? te?idgos oa QOBCseto pieaps asd hs^vB tli© S/nsie roadeay section as tli© mla fepldse* 331© fam@r Is I3J7»5 foot in longth and c<mQlst3 of alo^m spsns» and Xattsr is 307 foot in length and eonadsta of 4 span©* TRrtFFXC fOJUJMEB As a result of tiie ts^eea^t rapid grcr^rtai of this area^ vohicailar baffle tjetwson tho tijo cffis nirdtlas^ ^ieh ig served the oxisiiag four land la?id^^ has laereasca to tha point inhere to? essistlag laddgo is no tosgsr ^Kipable of baadllng toe traffic sffldentl^^ July ij? usually the peak f^oath ou th© Interstate Mldgo ^ito ^anday traffic voluEi-:5 being approxiaiatcdy 13S psrcant of the nvorag© daily for the monto# 13io average peak hour of tho traffic oeciars between AtOO and 5l(^ B3 anrl is of the avorag© ainmal ;?j^hotir ^^fle volaacs toaran atfov©* ^he bif^est hourly voltnaes are sho^n in Table IH. Traffie voIifroq in too vicinity of to© interstate bridge have increased at an avara^^^jo rat© of 10»7 I^pc^at per year for th© past tea ysssrs* I3as©d on mtorlty at tho year 2000^ tho aatioi^mtcd avoi^igo rate of is^ croasQ froa 1950 to 1930 is percent (®^ ^S» in* In 1946 and 1947 an origin destination traffic aurvcy of th© ?ancenv@r v:/©© conducted jointly by to© Stat/^> of Orcgca ond tasMngtcn Highssy Ktaordag Cisrveya^ cad daring too ©ana i?©riod a shiiilar atus^ of to© Bortlazid Metropolitan Area conduotai by th© Chfcgon State UighKoy De|)artomt» Bach mmp^ ms conducts in cooperation ^ito the Bureau of Boods and the local goveraBsnts of tij© dtlos of Tfoncoav^^ ^iuaMsgtua and PortlaQd^ rej^activaXy* IhsEJ© d^p^alopai a (^roat deal of vatoahl© date baarlng too need of a fbelHty bot^eoa the tm c4tictaa eoooo 60000 I1 T— I % Increase-1937TO /948 1/7 or Avg. of /OJZ/Ve. *Z3j. *! 0 ' jo,ooo °/o lNCJi.EASE /937 To /980 =286 or Avg. of 6.£%/Ya. ^0,000 % /NCJi.'EASE-/93O,To 7^80 = G8 OR Avg. of UX/Vt. 40OQ0 40,000 »>* S 0/ k: ^ 30.000 30,000 Q v\ <«j Cj d 0 X jF 0 I 20,000 20,000 ^ » 3 T/^AFF/C VOLUME WEND COLUMBIA 0VER INTERSTATE BR/PGE JO.OOO JO000 OREGON STATION 8-26 - • -•» - -»-• 1 --- • Qi I '^N I YEAB. '1980 Mafurify Avg % Increase F/GURE IT 2000 A/lafur/fy ©IS folXo'slfig record mera^o anmial rasabor of v^hidss por dfjgr ixsing ^slstisg bxl%^ sinca izidicatos tbe growth tsmi of vs^goIbt traffic botsraen t^o esatorst Annoal Avarag© Ammal A'^erag© ^oldeXas Per IDajr leas? ?ohlcl03 For Day 1936 \S//0b 1946 26,51^^ 1941 X9iiXU 1947 29,103 1942 kZfiOU 194^ 2S,6£K) 1943 21f210 1949 1944 21»516 1950 30,747 1945 24,596 Xa th© foUostiiE fabiid #1 is sho^ a broas&^oon of 1949 average daily ta^afiio fcy elasBaa of viMdesi TAEI^ #1 "teifftc VolBaos Xntaratat© Bridg© l?aaccitv£^ Claosoc of Vo^des ^ AD® 1949 120 vobiclea per day dagisog of Vehideo per Fercmt of Total Orsgoa Pac^cfiDcer Ccrs 162/40 57.5 PoroigB » ® >2,2 Ll^t rruLcks Eesvy Tracks i^4 'Iruelts - Seal Trailer o.a Tameko - ?a.li Trailer o»6 ISoaes 0^9 Total 100^0 •• 6 ^ DELAIS TO TRAJfIC Delsgrs to traffic crossing the intersts-te feiddge Is an vinfa-Toralsle foature of a low level biridge having e lift span which naist b© op^ied to servo river navigation.