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Water-Year Summary for Site USGS 12193400

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Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30
 
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USGS Water-Year Summary 2021
12193400 BAKER RIVER AT HENRY THOMPSON BRIDGE AT CONCRETE, WA
LOCATION - Lat 48°32'26", long 121°44'32" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.11, T.35 N., R.8 E., Skagit County, WA, Hydrologic Unit 17110005, on left bank 50 ft downstream from Henry Thompson Bridge, 0.2 mi northeast of Concrete, 0.3 mi downstream from Baker River powerplant and mile 0.7.
DRAINAGE AREA - 297 mi².
REVISIONS HISTORY - WSP 1286: 1911-13(M), 1945-46, drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1910 to March 1915, September 1943 to September 2008 (published as Baker River at Concrete, 12193500), October 2008 to current year.
GAGE - Water-stage recorder. Datum of gage is 170 ft above the National Geodetic Vertical Datum of 1929 and 174.08 ft above North American Vertical Datum of 1988. NAVD 88 datum (USGS level 2 GNSS survey). Prior to Mar. 5, 1915, non-recording gage at site 0.2 mi downstream at different datum. Sept. 1, 1943, to Jan. 22, 1958, water-stage recorder at site 700 ft. upstream at datum 172.6 ft. above NGVD of 1929 (from river-profile survey). Jan. 23 to June 11, 1958, powerplant record. Supplementary water-stage recorder on left bank about 40 ft. downstream from fish barrier and on tailrace of powerhouse at same datum. Recording gage installed on October 1, 2007, 300 ft. upstream of concrete weir at same datum.
COOPERATION - Puget Sound Energy provided streamflow data from dam upstream during period of backwater.
REMARKS - All diversions returned to river upstream from gage; at times, power generation is shut down for maintenance at Baker River or the fish-barrier dam causing the stage to drop below the control. Water is released through a valve-controlled pipe to the fish ladder located on the left bank just downstream from the gage and control. Flow regulated by Baker Lake (station 12191600) since July 1959 and Shannon Lake (station 12193000) since November 1925. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 36,600 ft³/s Nov. 19, 1962, elevation, 186.6 ft, computation of peak flow over dam; minimum daily discharge, 30 ft³/s Mar. 21-26, 1973, Apr. 26-28, May 7-9, 11, 1983, Apr. 20, 24-28, 1986.
Water-Data Report 2021
12193400 BAKER RIVER AT HENRY THOMPSON BRIDGE AT CONCRETE, WA -- Continued
DISCHARGE, CUBIC FEET PER SECOND
YEAR 2020-10-01 to 2021-09-30
DAILY MEAN VALUES
Day Oct
 2020
13,480
23,490
33,490
43,490
53,490
63,470
73,430
82,830
93,470
103,480
115,070
125,900
135,880
145,770
154,720
163,460
173,560
185,860
195,220
203,460
213,760
223,870
233,870
243,870
253,870
263,870
273,870
283,870
293,870
303,870
313,870
Total125,500
Mean4,048
Max5900
Min2830
Ac-ft248,900
Day Nov
2020
13,870
23,870
33,870
43,890
55,790
65,480
73,910
83,900
93,910
103,900
113,900
123,910
133,910
143,890
151,670
163,850
173,900
183,900
195,050
203,900
213,900
223,900
233,900
243,900
253,900
263,900
273,900
282,680
293,910
303,910
 -- 
Total118,100
Mean3,936
Max5790
Min1670
Ac-ft234,200
Day Dec
2020
13,910
23,900
33,910
43,900
52,980
62,180
73,780
81,820
92,230
101,410
112,000
122,220
132,660
142,230
152,140
162,740
171,420
181,420
191,430
202,240
213,820
222,120
233,160
243,110
253,260
261,410
271,420
282,960
293,200
302,070
312,330
Total79,380
Mean2,561
Max3910
Min1410
Ac-ft157,400
Day Jan
2021
12,580
21,440
33,830
45,750
55,740
65,720
75,710
85,700
95,670
102,850
113,600
125,680
131,510
141,330
151,800
161,590
171,870
183,370
193,770
203,770
213,660
223,020
231,980
242,630
252,790
263,030
273,110
282,850
292,920
301,960
312,560
Total103,800
Mean3,348
Max5750
Min1330
Ac-ft205,900
Day Feb
2021
12,770
22,110
33,560
41,430
51,410
61,410
71,410
82,980
92,980
103,660
112,950
125,220
133,590
144,200
155,290
162,890
173,300
183,300
191,440
201,400
211,400
221,420
231,410
241,410
251,410
261,410
271,410
281,410
 -- 
 -- 
 -- 
Total68,580
Mean2,449
Max5290
Min1400
Ac-ft136,000
Day Mar
2021
11,410
21,410
31,410
41,410
51,410
61,410
71,410
81,410
91,410
101,420
111,420
121,420
131,420
141,420
151,420
161,420
171,420
181,420
191,430
201,430
211,430
221,430
231,430
241,430
251,430
261,430
271,430
281,430
291,440
301,430
311,450
Total44,090
Mean1,422
Max1450
Min1410
Ac-ft87,450
Day Apr
2021
11,520
21,530
31,530
41,540
51,530
61,530
71,530
81,530
91,530
101,540
111,540
121,520
131,420
141,420
151,420
161,420
171,420
181,420
191,420
201,420
211,420
221,430
231,440
241,450
251,450
261,500
271,530
281,530
291,530
301,530
 -- 
Total44,540
Mean1,485
Max1540
Min1420
Ac-ft88,340
Day May
2021
11,530
21,530
31,530
41,530
51,470
61,430
71,430
81,430
91,430
101,430
111,430
121,430
131,430
141,430
151,430
161,440
171,440
181,440
191,440
201,440
211,440
221,440
231,440
241,440
251,440
261,440
271,450
281,450
291,450
301,450
311,460
Total44,990
Mean1,451
Max1530
Min1430
Ac-ft89,240
Day Jun
2021
12,160
25,720
35,710
45,580
51,780
62,900
75,540
82,820
91,570
101,560
112,040
122,610
133,900
142,360
154,180
165,350
173,860
184,860
195,480
205,470
215,350
225,300
234,720
244,680
255,460
265,440
277,000
288,090
296,950
305,340
 -- 
Total133,800
Mean4,459
Max8090
Min1560
Ac-ft265,300
Day Jul
2021
15,190
24,330
33,800
43,660
53,030
62,770
72,730
82,880
93,010
102,510
112,690
122,640
131,640
141,590
151,590
163,160
173,260
183,350
193,380
202,990
211,780
221,460
231,460
241,460
251,490
261,450
271,390
281,390
292,540
302,970
311,780
Total79,370
Mean2,560
Max5190
Min1390
Ac-ft157,400
Day Aug
2021
11,340
21,230
31,240
41,240
51,240
61,230
71,230
81,240
92,220
103,870
113,870
123,870
133,860
143,870
153,820
163,240
171,680
181,210
191,210
201,210
211,210
221,220
231,220
241,220
251,220
261,230
271,240
281,240
291,250
301,240
311,240
Total57,450
Mean1,853
Max3870
Min1210
Ac-ft113,900
Day Sep
2021
13,230
23,890
32,170
41,220
51,230
61,230
71,230
81,230
91,230
101,240
111,240
121,240
131,240
141,240
151,240
161,240
171,240
181,250
191,230
202,910
213,480
223,490
233,490
243,480
253,480
263,470
273,470
283,460
293,450
303,540
 -- 
Total66,780
Mean2,226
Max3890
Min1220
Ac-ft132,500
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1911 - 2021, BY WATER YEAR (WY)
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Mean 2,537   3,495   2,853   2,859   2,537   1,999   1,927   2,708   3,671   3,264   2,191   1,823  
Max 5,034   7,511   5,525   5,104   4,861   4,398   3,970   5,571   7,309   6,866   4,331   4,105  
(WY) (1968) (1991) (1976) (2006) (1951) (2007) (1972) (1949) (1974) (1971) (2011) (2004)
Min 446   1,067   626   736   736   51.2 129   641   509   1,625   1,032   667  
(WY) (2003) (1944) (2001) (1949) (1911) (2001) (2011) (2004) (1977) (1944) (1987) (1998)
Water-Data Report 2021
12193400 BAKER RIVER AT HENRY THOMPSON BRIDGE AT CONCRETE, WA -- Continued
SUMMARY STATISTICS
Water Year 2021 Water Years 1911 - 2021
Annual total 966,300                 
Annual mean 2,647         2,662        
Highest annual mean          3,543         1974
Lowest annual mean          1,712         1944
Highest daily mean 8,090         Jun 28 28,000         Feb 10, 1951
Lowest daily mean 1,210         Aug 18 30.0       Mar 21, 1973
Annual 7-day minimum 1,214         Aug 18 30.3       Mar 20, 1973
Maximum peak flow 8,270a        Jun 28 18,300a        Nov 27, 2011
Maximum peak stage 6.63      Jun 28 10.00      Nov 27, 2011
Annual runoff (cfsm) 8.91      8.94     
Annual runoff (inches) 121.0       121.5      
10 percent exceeds 4,720         4,320        
50 percent exceeds 2,160         2,450        
90 percent exceeds 1,250         746.0      
a Discharge affected by Regulation or Diversion
USGS Water-data graph for site USGS 12193400