The majestic St. Johns Bridge fades into the Oregon mist in this 1937 image. The view is to the east from on (or above) St. Helens Road. The remains of some of those pilings may still be in the river today.
That low riding vessel going under the bridge appears to be the ferry. I’m not certain, but I believe the ferry landing was just north of the bridge, at the current location of the Cathedral Park boat ramp.