Washington Administrative Code › Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508) › Chapter 173-503 - Instream resources protection program - Lower and Upper Skagit water resources inventory area (WRIA 3 and 4) › Section 173-503-040 - Establishment of instream flows

Current through Register Vol. 24-14, July 15, 2024
(1)
			 Stream management units and associated control stations are established as
			 follows:
Stream Management Unit Information
Stream Management
Unit Name
Control Station No.
Control Station by
River Mile and Section, Township and Range; Latitude
							 and Longitude
Stream Management Reach
Skagit Mainstem:
Skagit River near Mt. Vernon, WA
USGS Sta. #12-2005-00
River Mile (RM) 15.7
From mouth of Skagit River including tidal
							 fluctuation to headwaters.*
Cultus Mountain Tributaries:
Mundt Creek
Stream gage will be installed at RM 3.4
(Sec/Twn/Rng; Lat/Long)
From mouth to headwaters.
Turner Creek
Stream gage will be installed at RM 4.2
(Sec/Twn/Rng; Lat/Long)
From mouth to headwaters.
Gilligan Creek
Stream gage will be installed at RM 3.2
(Sec/Twn/Rng; Lat/Long)
From mouth to headwaters.
Salmon Creek
Staff gage periodically recorded will be installed at
							 RM 4.3
(Sec/Twn/Rng; Lat/Long)
From mouth to headwaters.
*Other additional control stations and instream flows
							 may be established in WRIAs 3 & 4 to improve water management.
(2)
			 Instream flows are established for the stream management units in WAC
			 173-503-040(1) as follows (See Figures 1 through 3):
Instream Flows as measured at USGS Sta. #12-2005-00
				(Instantaneous cubic feet per second)
Month
Day
USGS Sta. #12-2005-00
Skagit River
Jan.
1-31
10,000
Feb.
1-29
10,000
Mar.
1-31
10,000
Apr.
1-30
12,000
May
1-31
12,000
Jun.
1-30
12,000
Jul.
1-31
10,000
Aug.
1-31
10,000
Sep.
1-30
10,000
Oct.
1-31
13,000
Nov.
1-15
13,000
16-30
11,000
Dec.
1-15
11,000
16-31
10,000
Instream Flows for Cultus Mountain Tributaries, WRIA 3
				(Instantaneous cubic feet per second)
Month
Day
RM 3.4
Mundt Creek
RM 4.2
Turner Creek
RM 3.2
Gilligan Creek
RM 4.3
Salmon Creek
Jan.
1-31
6.4
7.9
19.8
4.0
Feb.
1-29
6.4
5.4
19.8
4.0
Mar.
1-15
6.4
5.4
19.8
4.0
16-31
9.4
5.4
27.7
4.0
Apr.
1-30
9.4
7.9
31.7
4.0
May
1-31
9.4
7.9
31.7
1.4
Jun.
1-30
9.4
4.9
31.7
1.4
Jul.
1-31
7.6
4.9
39.6
1.4
Aug.
1-31
7.6
4.9
39.6
1.4
Sep.
1-30
7.6
4.9
39.6
4.0
Oct.
1-31
7.6
7.9
23.8
4.0
Nov.
1-30
9.4
7.9
27.7
4.0
Dec.
1-31
9.4
7.9
27.7
4.0
(3)
			 Instream flow hydrograph.
Figure 1
Click to view
							 image
Figure 2
Click to view
							 image
Figure 3
Click to view
							 image
(4)
			 The instream flow hydrographs, as represented in Figures 1 through 3 in WAC
			 173-503-040(3) shall be used for identification of instream flows.
(5) Future consumptive water right permits
			 issued hereafter for diversion of surface water in the Lower and Upper Skagit
			 (WRIA 3 and 4) and perennial tributaries, and withdrawal of groundwater in
			 hydraulic continuity with surface water in the Skagit River and perennial
			 tributaries, shall be expressly subject to instream flows established in WAC
			 173-503-040(1) through
			 (3)    as measured at the appropriate gage, and
			 also subject to WAC
			 173-503-060.
(6) Future consumptive water rights issued to
			 applications pending at the effective date of the regulation are superior in
			 priority date but shall be conditioned on the instream flows established in WAC
			 173-503-040(1) through
			 (3). (RCW
			    90.03.247)
Statutory Authority:
				  Chapters
				  90.54 and 90.22 RCW, and
				  chapter 173-500 WAC. 01-07-027 (Order 99-05), § 173-503-040, filed
				  3/14/01, effective 4/14/01.