AFAIK the port slowdown is over and at present there is a traffic spike occurring as they tackle the backlog. Grain traffic will likely be down although I wouldn't rule it and Ethanol moves out.

Now, when I went up November 17th--the Sunday before they demolished "Overhead 377"--stack traffic was somewhat slow, although manifest, mineral, and grain traffic more than made up for it. Here's a sampling of what I saw from BNSF, according to this fella named 'WilliamFoamer':

WB:
G LRLKIN9 10A W 0358
Z LPKNBY7 14L W 0637
H BARPAS1 14A W 0943
M BARSTO1 14A W 1120
G MNXSWA5 08A W 1228
M BARBAK1 15A W 1355
M BARSTO3 15A W 1650
H BARPAS3 14A W 1814
S ALTOIG1 13V W 1829
Z WSPSTO8 14L W 1843
H BARPAS1 15A W 2113
EB:
H PASBAR1 09A E 0430
H VAWBAR1 13A E 0600
V RICELP4 15A E 0645
Z STOWSP8 16L E 0705
X KINMNX5 12A E 0921
M BAKBAR4 16A E 1000
X SWAHUO9 16A E 1540
Q RICALT6 16A E 1610
H VAWBAR1 14A E 1700
U PITKAI4 65T E 1815
H PASBAR1 10A E 1830

These aren't the regularly-scheduled times for the trains, but it provides a good ballpark estimate of what goes through in a day.