Table    Comparison of peak emergence dates to peak catch dates of juvenile fall chinook and chum below Bonneville Dam,
	1999-2003.
			Chinook										Chum
			1999		2000		2001		2002		2003		1999		2000		2001		2002	2003
	estimated peak
	emergence date:		April 28		April 14		May 06		April 26		April 26		April 04		March 13		March 26		Feb. 25	March 12
	temp. (oF):		50		48		52		48				44		41		44		39
	peak catch date:		June 15		May 12		May 01		June 07		?		April 01		March 21		April 17		April 09	?
	temp. (oF):		57		52		50		59				44		43		46		45
	Bonneville Dam
	tailwater elevation (ft)
	at first catch date:b		23.1		21.6		15.1		26.4				22.4		16.6		11.5		13.4
	Bonneville Dam
	discharge (KCFS)
	at first catch date:b		296		277		180		379				266		187		143		137
	number caught		391		1,710		1,156		319				13		37		1,024		141
	on peak date:
	% of total caught
	through peak date:		77		44		52		69				72		66		85		80
	mean length (mm):		57		47		51		60				42		38		43		39
	number of weeks
	between peak dates:		6		4		0		6				0		1		3		6

Table    Comparison of peak emergence dates to peak catch dates of juvenile fall chinook and chum below Bonneville Dam,
1999-2003.
		Chinook										Chum
		1999		2000		2001		2002		2003		1999		2000		2001		2002	2003
estimated peak
emergence date:		April 28		April 14		May 06		April 26		April 26		April 04		March 13		March 26		Feb. 25	March 12
temp. (oF):		50		48		52		48				44		41		44		39
peak catch date:		June 15		May 12		May 01		June 07		?		April 01		March 21		April 17		April 09	?
temp. (oF):		57		52		50		59				44		43		46		45
Bonneville Dam
tailwater elevation (ft)
at first catch date:b		23.1		21.6		15.1		26.4				22.4		16.6		11.5		13.4
Bonneville Dam
discharge (KCFS)
at first catch date:b		296		277		180		379				266		187		143		137
number caught		391		1,710		1,156		319				13		37		1,024		141
on peak date:
% of total caught
through peak date:		77		44		52		69				72		66		85		80
mean length (mm):		57		47		51		60				42		38		43		39
number of weeks
between peak dates:		6		4		0		6				0		1		3		6
a The majority of chinook represented in the numbers are of a late spawning stock (URBs).
b USACE 12:00 am reading.