"A proposed redevelopment project in Portland would reshape that city’s skyline, with plans that include, among other things, towering skyscrapers connected by a glass-enclosed botanical bridge that would be 680 feet in the air and span a distance of 236 feet.
Of the two tallest central towers, one would exceed 970 vertical feet..."
https://www.geekwire.com/2017/portland-architecture-firm-aims-really-high-proposal-tower-tallest-west-coast
Portland hasn't been allowed to grow as tall as Seattle, SF & LA.
