WAC 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. 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 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. *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 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).