(1) Base flows are established for stream management units with monitoring to take place at certain control stations as follows:

STREAM MANAGEMENT UNIT INFORMATION

Control Station No. Stream Management Unit Name	Control Station by River Mile and Section, Township and Range	Affected Stream Reach Including Tributaries
12.0200.00 Chehalis River Conf. w/Elk Creek	101.8 14-13-5W	From confluence with Elk Creek to headwaters except Elk Cr.
12.0205.00 Elk Creek	2.5 18-13-5W	From confluence with Chehalis River to headwaters.
12.0216.30 So. Fork Chehalis R.	0.3 24-13-4W	From mouth to headwaters.
12.0235.00 Chehalis River	77.6 2-13-3W	From confluence with Newaukum River to confluence with Elk Cr., excluding Elk Creek, and Newaukum Rivers.
12.0240.00 S. Fork Newaukum R.	22.8 28-13-1E	From confluence with Lost Creek to headwaters, excluding Lost Creek.
12.0245.00 N. Fork Newaukum River	6.6 35-14-1W	From mouth to headwaters.
12.0250.00 Newaukum River	4.1 9-13-2W	From mouth to confluence with Lost Cr. on S. Fork Newaukum River, excluding N. Fork Newaukum River.
12.0253.00 Salzer Creek	3.8 22-14-2W	From mouth to headwaters.
12.0264.00 Skookumchuck River	6.4 12-15-2W	From mouth to headwaters.
12.0275.00 Chehalis River at Grand Mound	59.9 22-15-3W	From confluence with Newaukum River to confluence with Prairie Creek.
12.0292.00 Black River	4.1 33-16-4W	From mouth to headwaters.
12.0305.00 Cedar Creek	1.1 14-16-5W	From mouth to headwaters.
12.0309.00 Porter Creek	1.3 22-17-5W	From mouth to headwaters.
12.0310.00 Chehalis River at Porter	33.3 28-17-5W	From confluence with Prairie Creek near Grand Mound to confluence with Porter Creek including Prairie Creek.
12.0325.00 Cloquallum Creek	1.9 36-18-6W	From mouth to headwaters.
12.0342.00 East Fk. Satsop R.	15.9 15-19-6W	From confluence with Dry Run Cr. to headwaters excluding Dry Run Cr.
12.0343.00 Decker Creek	0.3 31-19-6W	From mouth to headwaters.
12.0345.00 Middle Fk. Satsop R.	0.4 36-19-7W	From mouth to headwaters.
12.0350.00 Satsop River	2.3 36-18-7W	From mouth to confl. with Dry Run Cr. on East Fk. Satsop R.
12.0350.02 Chehalis R. below confl. w/Satsop R.	20.0 7-17-6W	From confluence with Porter Ck. to just below confl. with Satsop River.
12.0374.00 Wynoochee River	5.9 27-18-8W	From mouth to headwaters.
12.0380.00 Wishkah River	16.2 22-19-9W .	From influence of mean annual high tide at low base flow levels to headwaters. Excluding E. Fk. Wishkah River.
12.0382.90 E. Fk., Wishkah R.	0.9 36-19-9W	From mouth to headwaters.
12.0385.00 W. Fk. Hoquiam River	9.4 14-18-10W	From mouth to headwaters.
12.0385.80 Middle Fk. Hoquiam R.	1.6 4-18-10W	From mouth to headwaters.
12.0386.60 East Fork Hoquiam	7.1 8-18-9W	From mouth to headwaters.
12.0390.00 Humptulips River	24.8 17-20-10W	From influence of mean annual high tide at low base flow levels to headwaters.
12.0174.00 Elk River	3.0 3-16-11W	From influence of mean annual high tide at low base flow levels to headwaters.
12.0175.00 Johns River	6.0 21-16-10W	From influence of mean annual high tide at low base flow levels to headwaters.
12.0180.00 Newskah Creek	3.5 32-17-9W	From influence of mean annual high tide at low base flow levels to headwaters.
12.0185.00 Charley Creek	2.0 21-17-9W	From influence of mean annual high tide at low base flow levels to headwaters.

(2) Base flows established for the stream management units in WAC 173-522-020(1) are as follows:

BASE FLOWS IN THE CHEHALIS RIVER BASIN

(In Cubic Feet per Second)

Month	Day	12.0200.00 Chehalis R. nr. Elk Cr.	12.0205.00 Elk Cr.	12.0216.30 So. Fk. Chehalis R.	12.0235.00 Chehalis R.
Jan.	1	260	100	200	700
	15	260	100	200	700
Feb.	1	260	100	200	700
	15	260	100	200	700
Mar.	1	260	100	200	700
	15	260	100	200	700
Apr.	1	260	100	200	700
	15	260	100	200	700
May	1	195	76	145	525
	15	146	57	105	400
June	1	108	43	75	300
	15	82	32	55	230
July	1	62	25	40	175
	15	46	19	29	130
Aug.	1	37	16	21	98
	15	31	14	15	75
Sep.	1	31	14	15	75
	15	31	14	15	75
Oct.	1	39	15	21	92
	15	49	17	28	115
Nov.	1	88	31	56	215
	15	150	56	105	390
Dec.	1	260	100	200	700
	15	260	100	200	700

Month	Day	12.0240.00 Newaukum R. S. Fork	12.0245.00 Newaukum R. N. Fork		12.0250.00 Newaukum R.	12.0253.00 Salzer Cr.
Jan.	1	125		62	250		11
	15	125		62	250		11
Feb.	1	125		62	250		11
	15	125		62	250		11
Mar.	1	125		62	250		11
	15	125		62	250		11
Apr.	1	125		62	250		11
	15	125		62	250		11
May	1	110		47	210		5.8
	15	88		36	160		2.8
June	1	70		27	118		1.4
	15	56		21	90		.73
July	1	45		16	68		.38
	15	36		12	52		.20
Aug.	1	29		9	38		.10
	15	27		7	35		.05
Sep.	1	27		7	35		.05
	15	27		7	35		.05
Oct.	1	33		8.4	43		.14
	15	40		10	54		.40
Nov.	1	58		19	91		1.35
	15	85		34	150		3.9
Dec.	1	125		62	250		11
	15	125		62	250		11

Month	Day	12.0264.00 Skookumchuck River	12.0275.00 Chehalis R. at Grand M.	12.0292.00 Black R.	12.0305.00 Cedar Cr.
Jan.	1	160	1300	200		90
	15	160	1300	200		90
Feb.	1	160	1300	200		90
	15	160	1300	200		90
Mar.	1	160	1300	200		90
	15	160	1300	200		90
Apr.	1	160	1300	200		90
	15	160	1300	200		90
May	1	160	1000	170		70
	15	130	780	145		54
June	1	103	600	120		40
	15	83	460	104		31
July	1	67	355	88		24
	15	54	275	75		19
Aug.	1	43	210	70		14
	15	35	165	66		11
Sep.	1	35	165	66		11
	15	35	165	66		11
Oct.	1	35	200	68		13.8
	15	35	250	70		17
Nov.	1	59	440	100		30
	15	96	760	140		52
Dec.	1	160	1300	200		90
	15	160	1300	200		90

Month	Day	12.0309.00 Porter Cr.		12.0310.00 Chehalis R. at Porter	12.0325.00 Cloquallum Creek	12.0342.00 Satsop R. E. Fork
Jan.	1		90	2500	150	280
	15		90	2500	150	280
Feb.	1		90	2500	150	280
	15		90	2500	150	280
Mar.	1		90	2500	150	280
	15		90	2500	150	280
Apr.	1		90	2500	150	280
	15		90	2500	150	280
May	1		56	1900	118	240
	15		35	1420	92	210
June	1		29	1060	70	175
	15		24	800	55	152
July	1		21	610	43	130
	15		17	460	34	112
Aug.	1		14.2	340	29	104
	15		12	260	24	95
Sep.	1		12	260	24	86
	15		12	260	24	80
Oct.	1		13.3	320	27	80
	15		15	400	30	80
Nov.	1		28	760	52	125
	15		50	1380	88	185
Dec.	1		90	2500	150	280
	15		90	2500	150	280

Month	Day	12.0343.00 Decker Cr.	12.0345.00 Satsop R. M. Fork	12.0350.00 Satsop R. nr.	12.0350.02 Chehalis R. Satsop
Jan.	1	130	260	1100	3800
	15	130	260	1100	3800
Feb.	1	130	260	1100	3800
	15	130	260	1100	3800
Mar.	1	130	260	1100	3800
	15	130	260	1100	3800
Apr.	1	130	260	1100	3800
	15	130	260	1100	3800
May	1	115	203	910	2910
	15	103	160	750	2300
June	1	91	125	600	1750
	15	81	98	500	1360
July	1	72	78	425	1085
	15	64	61	360	860
Aug.	1	56	48	300	680
	15	50	38	260	550
Sep.	1	50	38	260	550
	15	50	38	260	550
Oct.	1	54	41	280	640
	15	58	45	300	750
Nov.	1	77	83	475	1305
	15	100	145	720	2220
Dec.	1	130	260	1100	3800
	15	130	260	1100	3800

Month	Day	12-0374.00 Wynoochee River	12-0380.00 Wishkah R.	12-0382.90 Wishkah R. E. Fk.		12-0385.00 Hoquiam R. W. Fk.
Jan.	1	560	135		33		32
	15	560	135		33		32
Feb.	1	560	135		33		32
	15	560	135		33		32
Mar.	1	560	135		33		32
	15	560	135		33		32
Apr.	1	560	135		33		32
	15	560	135		33		32
May	1	560	135		33		32
	15	560	113		27		26
June	1	450	95		21		20
	15	360	80		17		16
July	1	290	68		14		12.8
	15	230	57		11.3		10
Aug.	1	185	47		9		8
	15	150	47		9		8
Sep.	1	150	47		9		8
	15	150	47		9		8
Oct.	1	150	53		10.4		9.4
	15	230	60		12		11
Nov.	1	360	91		20		19
	15	560	135		33		32
Dec.	1	560	135		33		32
	15	560	135		33		32

Month	Day	12-0385.80 Hoquiam R. M. Fk.	12-0386.60 Hoquiam R. E. Fk.	12-0390.00 Humptulips River	12-0174.00 Elk River
Jan.	1	27	44	600	50
	15	27	44	600	50
Feb.	1	27	44	600	50
	15	27	44	600	50
Mar.	1	27	44	600	50
	15	27	44	600	50
Apr.	1	27	44	600	50
	15	27	44	600	50
May	1	27	44	600	43
	15	21	38	500	37
June	1	16	33	400	31
	15	12.2	29	325	26
July	1	9.5	25	265	22
	15	7.4	22	215	19
Aug.	1	5.6	19	170	16
	15	5.6	19	170	16
Sep.	1	5.6	19	170	16
	15	5.6	19	170	16
Oct.	1	6.7	19	205	20
	15	8.0	25	250	25
Nov.	1	15	34	390	32
	15	27	44	600	40
Dec.	1	27	44	600	50
	15	27	44	600	50

Month	Day	12-0175.00 Johns River	12-0180.00 Newskah Creek		12-0185.00 Charley Creek
Jan.	1	70		17		14
	15	70		17		14
Feb.	1	70		17		14
	15	70		17		14
Mar.	1	70		17		14
	15	70		17		14
Apr.	1	70		17		14
	15	50		17		14
May	1	50		13.4		11
	15	42		10.7		8.6
June	1	35		8.3		6.7
	15	29		6.5		5.4
July	1	24		5.2		4.2
	15	21		4.1		3.3
Aug.	1	17		3.2		2.5
	15	17		2.5		2
Sep.	1	17		2.5		2
	15	17		2.5		2
Oct.	1	17		3.2		2.6
	15	24		4		3.5
Nov.	1	35		8.4		7.1
	15	49		17		14
Dec.	1	70		17		14
	15	70		17		14

(3) Base flow hydrographs, Appendix 1, pages 19-23 in the document entitled "water resources management program in the Chehalis River basin" dated November, 1975 shall be used for definition of base flows on those days not specifically identified in WAC 173-522-020(2).

(4) All rights hereafter established shall be expressly subject to the base flows established in WAC 173-522-020 (1) through (3).

(5) At such time as the departments of fisheries and/or wildlife provide specific information substantiating the need for flows higher than the flows set forth in WAC 173-522-020(2), the department of ecology agrees to proceed with setting minimum flows as provided under chapter 90.22 RCW within one year from the time of said request, unless agreement to another time frame is reached between parties.

PDFWAC 173-522-020

Establishment of base flows.