 Nyorai kupfuurira kweiyi ndima - Muna 1991, kunyorwazve kuduku kwemigwagwa mikuru yenyika kwakaitika. Kuverengwazve kwakabereka migwagwa mikuru mitsva uye migwagwa mikuru yakachinjwa kana kubviswa mugadziriro yacho. Muna 1996, Sound Transit yakaumbwa uye mugore rimwe chetero, Washington State Transportation Commission yakagamuchira hurongwa hwayo hwekutanga hwekufambisa hwemakore makumi maviri. Mumakore ose e1990, WSDOT yakanyanya kuisa pfungwa pazvirongwa zvezvitima uye yakabatana neAmtrak kugadzira nzira yechitima yakabva kuCanada ichienda kuOregon, iyo yakazova Amtrak Cascades. Kudengenyeka kwenyika kweNisqually muna 2001yakakuvadza migwagwa mikuru yakawanda yenyika yakapoteredza nzvimbo huru yeguta reSeattle uye chikamu chikuru chebhajeti chakaendeswa kunharaunda yePuget Sound kuti ibatsire kuvakazve nokugadzira migwagwa namabhiriji. 