I've fished SE AK tidal spring steelhead for decades, and have had much success all the way down to "barnacle water" - waaay below high tide influence, a mile or more down from the top of tidewater. I've seen fish hold in many of the same pieces of water that coho do in the fall, and typically fish them with loooong leaders and smaaaall flies on a sloooow swing. Often, an observant angler will come upon them while cutthroat or dolly fishing with smolt patterns on the saltchuck. I've even seen them caught on size 10 and 12 Smolt patterns and 5 wt rods, though I never leave camp without a steelhead rod when cutthroat fishing the 'chuck anymore! On an incoming tide, the current eventually slows to the point where it is not moving at all; at that point, it is time to bust ass up to the next good water with current and hit it again. At the very top of tidewater, fish will often hang out for days, and fresh can be seen moving into the holes on each tide. My avatar is a fish from a SE AK tidewater hole taken on a 15 ft leader and a size 8 beadhead bugger swung agonizingly slowly about 15 minutes before the water started to move upstream. Tidewater is truly one of my favorite places to chase steelhead in SE; I love the hike-and-hunt mode of covering a long estuary - chasing cutthroat and dollies with my 4wt LL, watching early spring bears digging roots and swinging up sea-lice steelhead!