Bummer for the bridge, I've been across it.
Can't say I've ever been on that one.... and probably can say I won't ever, now....
First time we went to Eagle Creek park was last summer. Seems to be just north of there a bit.
Steel truss bridges are rather susceptible to sudden failure when you bend or break one or two bits.
An over height semi load dumped the south bound lanes (3) of I5 into the Skagit River about six years ago. Driver didn't move into the center lane where there was adequate clearance.
Steel truss bridges are an elegant engineering solution that can carry a lot of weight, but they will fail pretty spectacularly with a small amount of damage to certain components.