Wash. Admin. Code § 173-511-030

Current through Register Vol. 24-20, October 15, 2024

Section 173-511-030 - Establishment of instream flows

(1) Stream management units and associated control stations are established as follows:

STREAM MANAGEMENT UNIT INFORMATION

Control Station No. Stream Management Unit Name	Control Station Location, River Mile and Section, Township and Range	Affected Stream Reach
New gage Nisqually River	4.3 9, 18N, 1E	From influence of mean annual high tide at low base flow levels to the outlet of the Centralia City Light Power Plant.
12-0895-00 Nisqually River	21.8 28, 17N, 2E	From outlet of the Centralia City Light Power Plant at river mile 12.6 to Centralia City Light Power canal diversion at river mile 26.2, including all tributaries.
12-0884-00 Nisqually River	32.6 21, 16N, 3E	From the Centralia City Light Power canal diversion at river mile 26.2 to gage 12-0865-00 near the La Grande Power Plant, including all tributaries except the Mashel River.
12-0825-00 Nisqually River	57.8 29, 15N, 6E	From gage 12-0865-00 near the La Grande Power Plant to the headwaters including all tributaries.
12-0870.00 Mashel River	3.25 11, 16N, 4E	From mouth upstream to the headwaters including all tributaries.

(2) Instream flows established for the stream management unit described in WAC 173-511-030(1) are as follows:

INSTREAM FLOWS IN THE NISQUALLY RIVER BASIN

(in Cubic Feet per Second)

Month	Day	Lower Reach of the Nisqually River USGS Gage 12-* RM 4.3 RM 4.3	Bypass Reach of the Nisqually River USGS Gage 12-0895-00 RM 21.8	Mid Reach of the Nisqually River USGS Gage 12-0884-00 RM 32.6-
January	1	900	600	900
	15	900	600	900
February	1	900	600	900
	15	900	600	900
March	1	900	600	900
	15	900	600	900
April	1	900	600	900
	15	900	600	900
May	1	900	600	900
	15	900	600	900
June	1	900	500(closed)	800(closed)
	15	850	450(closed)	800(closed)
July	1	800	400(closed)	800(closed)
	15	800	400(closed)	800(closed)
August	1	800	370(closed)	800(closed)
	15	800	370(closed)	650(closed)
September	1	600	370(closed)	600(closed)
	15	600	370(closed)	600(closed)
October	1	700	550(closed)	700(closed)
	15	700	550(closed)	700(closed)
November	1	700	600	700
	15	700	600	700
December	1	800	600	800
	15	900	600	900

*New gage to be established.

Month	Day	Upper Reach of the Nisqually River USGS Gage 12-0825-00 RM 57.8	Mashel River USGS Gage 12-0870-00 RM 3.25
January	1	450	100
	15	450	100
February	1	450	100
	15	450	100
March	1	450	100
	15	450	100
April	1	450	100
	15	450	100
May	1	450	100
	15	450	80
June	1	600	80(closed)
	15	650	70(closed)
July	1	550	50(closed)
	15	500	40(closed)
August	1	450	30(closed)
	15	400	30(closed)
September	1	350	20(closed)
	15	300	20(closed)
October	1	300	20(closed)
	15	300	20(closed)
November	1	350	40
	15	400	70
December	1	450	100
	15	450	100

(3) Instream flow hydrographs, as represented in the document entitled "Nisqually River basin instream resource protection program," shall be used for identification of instream flows on those days not specifically identified in WAC 173-511-030(2).

Wash. Admin. Code § 173-511-030

Statutory Authority: Chapters 90.22 and 90.54 RCW. 81-04-028 (Order DE 80-42), § 173-511-030, filed 2/2/81.