UPDATED 7:39 PM: Two scenes, one incident, working right now. We’re at lower Spokane St. at East Marginal, where a motorcycle rider apparently fell to the surface, off the bridge, where the motorcycle was found:

The rider is reported by SFD to have “critical” injuries.

Police are on the high rise bridge and here at Spokane/Marginal. They’re also, according to the scanner, closing the southbound 99 offramp to the westbound bridge so they can figure out “where the point of impact” was. Spokane/East Marginal is closed all ways. Be aware, if you’re trying to get to/from Harbor Island, that besides this incident, the weekend-long construction-project closures have resulted in detours.

7:51 PM UPDATE: We’re still at Spokane/Marginal. Traffic is being allowed northbound on East Marginal, but surface Spokane St. is closed west of East Marginal.

That and the southbound 99 ramp to the westbound bridge – which is right over the scene where the rider was found (photo above) – will both be investigation scenes for the Traffic Collision Investigation Squad and will be closed TFN.

8:32 PM: To get back to West Seattle, we took the westbound bridge from the 1st Avenue South ramp, and saw two SPD cars on the left shoulder of the bridge before the high rise, with the injured rider’s motorcycle still on the ground. SPD is describing this as a “single-vehicle collision,” so far, but the investigation is continuing. No further information on the rider yet.

9:58 PM: So far as we know, both closures are still in effect. If we don’t hear anything official by 10:30, we’ll go check. Meantime, we have added some photos above.

11:25 PM: Live, albeit blurry, video via the SDOT Travelers’ Map, for 99/Lander, shows the offramp to the West Seattle Bridge is still closed.

11:29 PM: And moments later … per scanner, confirmed by that video feed, police have JUST reopened the ramp. Their investigation continues on the roadway below.

ADDED SUNDAY, MIDDAY: In comment discussion below, family members say the rider has died. SPD hasn’t yet released any additional information.

SUNDAY AFTERNOON: The rider’s family tells us his name was Ryan, and he was 41 years old.