Washington Administrative Code › Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508) › Chapter 173-505 - Instream resources protection and water resources program › STILLAGUAMISH RIVER BASIN WATER RESOURCES INVENTORY AREA (WRIA) 5 › Section 173-505-050 - Establishment of instream flows

Current through Register Vol. 24-14, July 15, 2024
(1)
				Instream flows established in this section protect stream flows from future
				withdrawals, and preserve flow levels that are necessary to protect wildlife,
				fish, water quality, scenic, aesthetic and other environmental values,
				navigational values, and stock watering requirements.
(2) Instream flows established in this
				section are water rights with a priority date the same as the effective date of
				this chapter.
(3) Instream flows
				are expressed in cubic feet per second (cfs). These flows are measured at the
				control points identified in WAC
				173-505-040 and apply to the
				stream management reach. The instream flow provisions for any water right
				located in a stream management unit shall specifically describe the instream
				flow levels for the control station in that unit and shall refer generally to
				other downstream instream flow requirements that may also become controlling
				and critical to the use of water under such right.
(4) Instream flows are to be protected from
				impairment by junior water rights. Except as provided in WAC
				173-505-080,
				173-505-090, and
				173-505-110, junior water rights
				shall be exercised only when flow conditions provide enough water to satisfy
				senior rights, including the instream flows set in this chapter. Withdrawals of
				water that would conflict with the established instream flows shall be
				authorized only in those situations where it is clear that overriding
				considerations of the public interest will be served.
(5) Stream flow requirements on existing
				water rights are not modified by this chapter. Existing water rights that
				include a provision that water use will be subject to future instream flows are
				now subject to the instream flows established in WAC
				173-505-050.
(6) Instream flows are established for the
				stream management units in WAC
				173-505-040, as follows:
Table 2 Instream Flows for the Mainstem and North and
				  South Forks, Stillaguamish River
(in cubic feet per second) (RM = River Mile)
Ecology Station #05A070
USGS Station
#12167000
Ecology Station #05B090
USGS Station #12161000
Month
Day
Stillaguamish RM 11.2
North Fork Stillaguamish RM 6.5
North Fork Stillaguamish RM 17.6
South Fork Stillaguamish RM 24.4
South Fork Stillaguamish RM 34.9
Jan.
1-31
2200
1200
915
1800
1200
Feb.
1-29
2000
1200
850
1600
1200
Mar.
1-15
2000
1300
850
2250
1600
16-31
2000
1300
915
2250
1600
Apr.
1-30
2000
1300
915
2000
1600
May
1-31
2000
1300
915
2000
1600
Jun.
1-15
2000
1300
915
1200
1060
16-30
2000
1400
650
1200
1060
Jul.
1-15
2000
1100
600
1150
1060
16-31
2000
800
500
750
700
Aug.
1-15
1700
800
425
750
700
16-31
1700
800
500
750
700
Sep.
1-15
1700
800
700
775
700
16-30
1700
800
850
775
700
Oct.
1-15
1700
800
870
1250
1200
16-31
1700
800
870
1900
1700
Nov.
1-15
2200
950
915
2300
1800
16-30
2200
950
915
2300
1800
Dec.
1-31
2200
1300
915
2500
1800
Table 3 Instream Flows for Tributaries of the Mainstem
				  and North and South Forks Stillaguamish River Basin
(in cubic feet per second) (RM = River Mile)
RM 0.5
RM 17
RM 1.2
RM 3.3
RM 5.0
RM 0.3
RM 1.3
RM 0.3
Month
Day
Pilchuck Creek
Pilchuck Creek
Squire Creek
Jim
Creek
Canyon Creek
Lake Creek
Deer Creek
Brooks Creek
Jan.
1-31
170
98
200
250
525
21
411
39
Feb.
1-29
170
98
200
250
450
21
411
39
Mar.
1-15
170
98
280
250
450
21
474
68
Mar.
16-31
170
98
280
250
450
21
474
68
Apr.
1-30
170
98
280
250
450
21
474
68
May
1-31
170
98
280
250
450
21
474
68
Jun.
1-15
170
98
280
250
450
21
313
45
Jun.
16-30
170
98
280
250
350
21
313
45
Jul.
1-31
170
98
200
250
350
21
195
45
Aug.
1-31
140
98
200
250
350
21
88
17
Sep.
1-30
170
98
200
250
400
21
353
17
Oct.
1-31
170
98
200
250
525
21
617
39
Nov.
1-15
170
98
160
250
525
21
411
39
Nov.
16-30
170
98
160
250
525
21
411
39
Dec.
1-31
170
98
160
250
525
21
411
39
Table 4 Instream Flows for Tributaries of the Mainstem
				  and North and South Forks Stillaguamish River Basin
(in cubic feet per second) (RM = River Mile)
RM 0.3
RM 1.0
RM 0.5
RM 0.4
RM 0.3
RM 0.2
RM 0.2
RM 0.1
Month
Day
Montague Creek
Rollins Creek
Boulder Creek
French Creek
Segelson Creek
Furland Creek
Ashton Creek
Grant Creek
Jan.
1-31
29
47
167
56
47
33
34
67
Feb.
1-29
29
47
167
56
47
33
34
67
Mar.
1-15
53
80
203
73
79
44
46
87
Mar.
16-31
53
80
203
73
79
44
46
87
Apr.
1-30
53
80
203
73
79
44
46
87
May
1-31
53
80
203
73
79
44
46
87
Jun.
1-15
35
53
134
48
52
29
30
57
Jun.
16-30
35
53
134
48
52
29
30
57
Jul.
1-31
35
53
134
48
52
29
30
57
Aug.
1-31
12
20
154
18
20
10
10
23
Sep.
1-30
12
47
250
84
47
49
51
101
Oct.
1-31
29
47
167
84
47
49
51
101
Nov.
1-15
29
47
167
56
47
33
34
67
Nov.
16-30
29
47
167
56
47
33
34
67
Dec.
1-31
29
47
167
56
47
33
34
67
Table 5 Instream Flows for Tributaries of the Mainstem
				  and North and South Forks Stillaguamish River Basin
(in cubic feet per second) (RM = River Mile)
RM 3.0
RM 0.5
RM 7.0
RM 2.0
RM 1.1
RM 1.5
Month
Day
Church
Creek
Glade Bekken Creek
Portage Creek
Fish
Creek
Rock
Creek
Koonz
Creek
Jan.
1-31
24
10
11
16
29
19
Feb.
1-29
24
10
11
16
29
19
Mar.
1-15
43
21
22
30
53
36
Mar.
16-31
43
21
22
30
53
36
Apr.
1-30
43
21
22
30
53
36
May
1-31
43
21
22
30
53
36
Jun.
1-15
28
14
14
20
35
24
Jun.
16-30
28
14
14
20
35
24
Jul.
1-31
28
14
14
20
35
24
Aug.
1-31
10
4
4
6
12
8
Sep.
1-30
10
4
4
6
29
19
Oct.
1-31
24
10
11
16
29
19
Nov.
1-15
24
10
11
16
29
19
Nov.
16-30
24
10
11
16
29
19
Dec.
1-31
24
10
11
16
29
19
Table 6 Instream Flows for Tributaries of the Mainstem
				  and North and South Forks Stillaguamish River Basin
(in cubic feet per second) (RM = River Mile)
RM 1.5
RM 1.0
RM 0.1
RM 1.6
RM 0.0
Month
Day
Harvey
Creek
Armstrong
Creek
Jordan
Creek
Tiger
Creek
Siberia
Creek
Jan.
1-31
9
34
18
27
37
Feb.
1-29
9
34
18
27
37
Mar.
1-15
6
46
34
48
49
Mar.
16-31
6
46
34
48
49
Apr.
1-30
6
46
34
48
49
May
1-31
4
46
34
48
49
Jun.
1-15
4
30
22
32
32
Jun.
16-30
4
30
22
32
32
Jul.
1-31
4
30
22
32
32
Aug.
1-31
4
10
7
11
11
Sep.
1-30
4
51
18
11
27
Oct.
1-31
4
51
18
11
55
Nov.
1-15
9
34
18
27
37
Nov.
16-30
9
34
18
27
37
Dec.
1-31
9
34
18
27
37
Statutory Authority: Chapters 43.27A,
					 90.54, 90.22, and 90.82 RCW.
					 05-18-016 (Order 02-17), § 173-505-050, filed 8/26/05, effective
					 9/26/05.