Ngasekupheleni kuka-Matshi walo nyaka, ngenxa yokuvuleka kweenyawo ezimbini kwiiveki ezimbini, amagosa avela kwiSebe lezoThutho laseSeattle (SDOT) avala i-traffic kwi-West Seattle Bridge.
Ngelixa amagosa e-SDOT ezama ukuzinzisa ibhulorho kwaye abone ukuba ibhulorho inokusindiswa okanye ukuba ibhulorho kufuneka ithathelwe indawo ngokupheleleyo, bacela ingcebiso kumyili malunga nokutshintshwa kwebhulorho., Kwimeko apho ngoku siyakwazi ukwenza ukulungiswa kwexesha elifutshane ukuvula kwakhona ibhuloho ngokukhawuleza, kodwa kwiminyaka embalwa ezayo, inkxaso yoyilo isafuneka ukuba ithathe indawo yebhuloho.“Ixabiso lekhontrakthi lisuka kwi-US$50 ukuya kwi-150 yezigidi zeedola.
Ekuqaleni, iiMfuno zeMqinisekiso yesiXeko saseNew York (RFQ) kwiinkampani zobunjineli zabonakala zilinganiselwe kwiindlela ezizezinye.Nangona kunjalo, njengoko inkxaso yoluntu isanda, injineli edla umhlala-phantsi u-Bob Ortblad naye wenze ukuba isiXeko saseNew York siquke iindlela ezizezinye zetonela kwi-RFQ.IsiXeko saseNew York senze isihlomelo kwiphepha lemibuzo, elithi: "Ezinye iindlela ziya kuvavanywa njengenxalenye yekhontrakthi, kubandakanywa kodwa kungaphelelanga kwitonela kunye neendlela zokulungelelanisa ukuguqulwa kwesandi."
Okubangela umdla kukuba, ngaphambi kokuba ekugqibeleni bathathe isigqibo sokuba yiWest Seattle Bridge yangoku, amagosa aseSeattle aqwalasela iindlela eziphantse zibe ngama-20 ngo-1979, apho ezinye iindlela ezimbini zetonela zaye zapheliswa.Zinokufumaneka kwiiNdlela ezizezinye ze-12 kunye ne-13 kwiNgxelo yokuGqibela yeMpembelelo yokuSingqongileyo (EIS) ye-Spokane Street Corridor."Ngenxa yeendleko eziphezulu, ixesha elide lokwakha kunye nokonakalisa okuphezulu, basuswa ekucingeni."
Oku akukho ngaphandle kwenkcaso, kuba ilungu loluntu elithathe inxaxheba kwi-Harbour Island Machine Works ligqabaze nge-EIS: "Baye bemba itonela emhlabeni ngexabiso eliphezulu kakhulu, kwaye akukho mntu unike amanani.Ngoku, leliphi inani endilibuzayo, Okanye ngaba bakhe balizama?"
I-tunnel ye-tunnel tunnel (ITT) ihluke kakhulu kwi-tunnel ye-SR 99.Xa usebenzisa "i-Bertha" (itonela elikruqulayo umatshini) ukwenza itonela 99, itonela ityhubhu entywiliselweyo waphoswa kwi-site kwidokhi owomileyo, emva koko ithuthwe kwaye ifakwe ngaphantsi kwamanzi afakwe emanzini.
IJapan ineetonela ezingama-25 eziphantsi kwamanzi.Umzekelo wendawo ngakumbi we-ITT yiGeorge Massey Tunnel phantsi koMlambo iFraser eVancouver, eBritish Columbia.Eli tonela lakhiwa iminyaka engaphezulwana kwemibini, kuquka amacandelo amathandathu ekonkile, laza lafakwa kwiinyanga ezintlanu.U-Ortblad ukholelwa ukuba itonela edlula eDuwamish iya kuba yindlela ekhawulezayo nefikelelekayo yokwakha.Umzekelo, unikeze ngepontoni ye-77 SR 520 efunekayo ukuwela iLake Washington - iipontoni ezimbini nje ezitshoneyo zinokuwela iDuwamish.
U-Ortblad ukholelwa ukuba iingenelo zeetonela kwiibhulorho azibandakanyi nje ukunciphisa iindleko kunye nokukhawulezisa isantya sokwakha, kodwa kunye nobomi benkonzo ende kunye nokumelana nokuzamazama komhlaba.Nangona ukutshintshwa kweebhulorho xa kwenzeka inyikima kusachaphazeleka kukunyibilika komhlaba, itonela ine-neutral buoyancy kwaye ngoko ke ayichatshazelwa ziziganeko ezinkulu zenyikima.I-Ortblad ikwakholelwa ukuba itonela ineenzuzo zokuphelisa ingxolo, ungcoliseko olubonakalayo kunye nokusingqongileyo.Ayichatshazelwa ziimeko zemozulu ezimbi njengenkungu, imvula, umkhenkce omnyama nomoya.
Kukho ezinye iingqikelelo malunga namathambeka angumnqantsa angena kwaye aphume kwitonela kunye nendlela eyichaphazela ngayo indlela yomzila kaloliwe wokukhanya.U-Ortblad ukholelwa ukuba ukucutha kwe-6% kwiziphumo zizonke kungenxa yokuba ukuhla kweenyawo ze-60 yindlela emfutshane kunokuphakama kweenyawo ze-157.Wongezelela ukuba umzila kaloliwe okhanyayo odlula kwitonela ukhuselekile kakhulu kunokuqhuba umzila kaloliwe okhanyayo phezu kwebhulorho yeenyawo ezili-150 phezu kwamanzi.(Ndicinga ukuba uloliwe okhanyayo kufuneka akhutshelwe ngaphandle ngokupheleleyo kwingxoxo yeendlela ezizezinye zeWest Seattle Bridge.)
Ngelixa uluntu lulindele ukuva ukuba i-Seattle DOT iyakufuna ezinye iimveliso, kulungile ukubona ukuba uluntu luthatha inxaxheba kwezinye iindlela ezinokusetyenziswa.Andiyonjineli kwaye andazi ukuba oku kuya kusebenza na, kodwa ingcebiso inomdla kwaye ifanele ukuqwalaselwa nzulu.
Ixesha lokuposa: Nov-02-2020