Wash. Admin. Code § 173-511-030
(1) Stream management units and associated control stations are established as follows:
STREAM MANAGEMENT UNIT INFORMATION
| Control StationNo. StreamManagementUnit Name | Control StationLocation, RiverMile and Section,Township and Range | Affected StreamReach |
| New gageNisqually River | 4.39, 18N, 1E | From influence of mean annual high tide at low base flow levels to the outlet of the Centralia City Light Power Plant. |
| 12-0895-00Nisqually River | 21.828, 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. |
| 12-0884-00Nisqually River | 32.621, 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. |
| 12-0825-00Nisqually River | 57.829, 15N, 6E | From gage 12-0865-00 near the La Grande Power Plant to the headwaters including all tributaries. |
| 12-0870.00Mashel River | 3.2511, 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 Reachof theNisquallyRiverUSGS Gage12-* RM 4.3RM 4.3 | Bypass Reachof theNisquallyRiverUSGS Gage12-0895-00RM 21.8 | Mid Reachof theNisquallyRiverUSGS Gage12-0884-00RM 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 Reachof theNisqually RiverUSGS Gage12-0825-00RM 57.8 | Mashel RiverUSGS Gage12-0870-00RM 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 |
[Statutory Authority: Chapters 90.22 and 90.54 RCW. WSR 81-04-028 (Order DE 80-42), § 173-511-030, filed 2/2/81.]