As long as you can guarantee death it really doesn't matter. I'd advise against water though, since bridge jumping requires you to really lob urself off fast or people will report you(since most bridges that high are likely to be heavily trafficked by cars.
That being said keep in mind you're gonna wanna head first that bitch since it's actually scary how far of a fall humans can live.
Ultimately, if that's how you are planning on going then I wish you the best of luck. Still, if ur not certain please browse other methods. Ik SN is kinda a bitch to get but there's always the night night