WAC 173-522-020
WAC 173-522-020. Establishment of base flows
(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.
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
12.0200.00
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
12.0240.00
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
12.0264.00
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
12.0309.00
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
12.0343.00
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
12-0374.00
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
12-0385.80
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
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.