98km is INSANE!
By comparison, the city should be 300km wide, the river should be at least 50km wide and that single bend alone should be longer than the world longest river!
The Panama canal required a gargantuan effort for 35 years, France renounced to the task midway after almost going bankrupt, America developed an entirely new industry solely dedicated to the development and production of the machines required, it cost the equivalent of todays 25 billions dollars and more than 50'000 people died during the construction. And it is "only" 88km long...
To make any sense, it should be 98 meters...