Originally Posted by dirtbagkayaker
The lower rarely gets this low.
The data does not support this statement. Daily mean flows for the USGS at Whitebird gage can be reviewed here and the record goes back to 1910:
USGS Current Conditions for USGS 13317000 SALMON RIVER AT WHITE BIRD ID
Lets take a look at the month of August and specifically today's date of August 17 for the prior 20 years, 1997 to 2006. The instantaneous flow right now is 3710 cfs at 3:45 pm pacific time.
The meain daily flow was essentially at this level or lower in 10 of the last 20 years (counting this year), not rare, in fact it is as common as a much higher flow (i.e. 50% of the years in the last 20 were at this same level or lower this time of year).
Mean daily flow on Aug 17 for years that were essentially the same as todays flow (on a side note, it is mathematically interesting that the mean daily flow on Aug 17 in 2013 and 2015 was the same):
year mean daily flow (cfs)
2000 = 3390
2001 = 2840
2002 = 3570
2003 = 3720
2004 = 3570
2005 = 3700
2007 = 3160
2013 = 3460
2015 = 3460
If you were a boater on the lower salmon in the prior decade, this low flow was in fact the norm and not unusual at all, with the majority of years being this low or lower. It is the high flows in between 2007 and 2013 that has likely skewed your minds-eye to thinking these flow flows are rare.