Mu mpera za Werurwe uyu mwaka, kubera ubwiyongere bwagutse bwa metero ebyiri mu byumweru bibiri, abayobozi bo mu ishami rishinzwe gutwara abantu n'ibintu muri Seattle (SDOT) bafunze umuhanda ku kiraro cy’iburengerazuba bwa Seattle.
Mugihe abayobozi ba SDOT bagerageje guhagarika ikiraro no kumenya niba ikiraro gishobora gukizwa cyangwa niba ikiraro kigomba gusimburwa burundu, basabye uwabishizeho inama kubijyanye no gusimbuza ikiraro., Mugihe ubu dushobora gukora gusana mugihe gito kugirango twugurure ikiraro vuba bishoboka, ariko mumyaka mike iri imbere, haracyakenewe inkunga yo gushushanya kugirango dusimbure ikiraro."Agaciro k’amasezerano kari hagati ya $ 50 na miliyoni 150 US $.
Ku ikubitiro, Ibisabwa byujuje ibisabwa mu mujyi wa New York (RFQ) ku masosiyete y’ubwubatsi byagaragaye ko bigarukira gusa ku bindi biraro.Ariko, uko inkunga yabaturage yariyongereye, injeniyeri yubukure mu kiruhuko cyiza Bob Ortblad yanashoboje Umujyi wa New York gushyiramo ubundi buryo bwa tunnel muri RFQ.Umujyi wa New York washyizeho umugereka ku rupapuro rw’iperereza, ugira uti: "Ubundi buryo buzasuzumwa mu rwego rw’amasezerano, harimo ariko ntibugarukira gusa ku buryo bwo guhuza amajwi no guhuza amajwi."
Igishimishije, mbere yo gufata umwanzuro wo kuba ikiraro cya West Seattle kiriho ubu, abayobozi ba Seattle batekereje kubindi bigera kuri 20 mumwaka wa 1979, muribwo buryo bubiri bwakuweho.Bashobora kuboneka muburyo butandukanye 12 na 13 mumagambo yanyuma yibidukikije (EIS) yumuhanda wa Spokane."Bitewe n'ibiciro byinshi, igihe kirekire cyo kubaka no gusenya cyane, bavanyweho."
Ibi nta nkomyi, kubera ko umwe mu baturage bitabiriye imashini y’imashini ya Harbour Island yagize icyo avuga kuri EIS ati: “Bacukuye umuyoboro hasi ku giciro cyo hejuru cyane, kandi nta muntu watanze imibare.None, ishusho ndimo kubaza niyihe, Cyangwa barigeze kuyigerageza? "
Umuyoboro wibizwe (ITT) uratandukanye cyane na SR 99.Iyo ukoresheje "Bertha" (imashini irambirana ya tunnel) kugirango ukore uwo muyoboro wa 99, umuyoboro wacengewe wajugunywe ahabigenewe byumye, hanyuma ujyanwa mu mazi washyizwe mumazi.
Ubuyapani bufite tunel 25 zarohamye.Urugero rwibanze rwa ITT ni umuyoboro wa George Massey munsi yumugezi wa Fraser i Vancouver, muri Columbiya y'Ubwongereza.Umuyoboro watwaye imyaka irenga gato ibiri yo kubaka, harimo ibice bitandatu, kandi washyizweho mumezi atanu.Ortblad yizera ko umuyoboro unyura Duwamish nawo uzaba inzira yihuse kandi ihendutse yo kubaka.Kurugero, yatanze ponton 77 SR 520 ikenewe kugirango yambuke ikiyaga cya Washington - ponto ebyiri zarohamye zishobora kwambuka Duwamish.
Ortblad yizera ko ibyiza bya tunel ku biraro birimo kugabanya ibiciro no kwihutisha ubwubatsi, ariko kandi no kuramba kwa serivisi ndende no kurwanya umutingito ukomeye.Nubwo gusimbuza ibiraro mugihe habaye umutingito bikomeje kwibasirwa nubutaka bw’ubutaka, uyu muyoboro ufite ubwigenge butagira aho bubogamiye bityo ukaba udaterwa ahanini n’imitingito nini.Ortblad yizera kandi ko uyu muyoboro ufite ibyiza byo gukuraho urusaku, kwanduza ibidukikije no kwangiza ibidukikije.Ntabwo byatewe nikirere kibi nkigihu, imvura, urubura rwumukara numuyaga.
Hariho imyanzuro imwe yerekeranye n'ahantu hahanamye hinjira no gusohoka muri tunnel nuburyo bigira ingaruka kunyura muri gari ya moshi.Ortblad yizera ko kugabanuka kwa 6% mubisubizo rusange ari ukubera kumanuka metero 60 nuburyo bugufi kuruta kuzamuka metero 157.Yongeyeho ko gari ya moshi yoroheje inyura mu muyoboro ifite umutekano kuruta gukora gari ya moshi yoroheje hejuru y’ikiraro cya metero 150 hejuru y’amazi.(Ndatekereza ko gari ya moshi yoroheje igomba gukurwaho rwose mubiganiro byubundi buryo bwikiraro cya Seattle.)
Mugihe abaturage bategereje kumva niba Seattle DOT izashaka ibindi bicuruzwa, nibyiza kubona ko abaturage bitabira ubundi buryo bufatika.Ntabwo ndi injeniyeri kandi sinzi niba ibi bizagenda neza, ariko igitekerezo kirashimishije kandi gikwiye kwitabwaho.
Igihe cyo kohereza: Ugushyingo-02-2020