There are different versions of which quads belong to Washington.
There following edge quads are listed on my index map but have no
DRG files in the Washington data set:
<pre>
o45118h6
o45118h7
o45121e8
o47123h8
o48122g7
o48123b2
</pre>
The following edge quads were downloaded from gsidatadepot and added to
this dataset:
<pre>
o45122e6
o45122f7
o45122g7
o45122h7
</pre> 
The following edge quads are represented by DRG files but are not on my
index map:
<pre>
o45117h7
o45117h8
o46123a1
o46123a2
o46123a3
o46123a4
o46123a5
o46123a6
o46123a7
o46123a8
o46123b6
o46124b1
o48123b1
</pre>
Seattle North, Bellevue, Seattle South, and Bellevue South are 15' wide,
and are represented by 
<pre>
k47122e1
k47122e3
k47122f1
k47122f3
</pre>