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Water-Year Summary for Site USGS 09427520

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Available Parameters
00060 Discharge(Mean)  

Water year 2020: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2020
09427520 COLORADO RIVER BELOW PARKER DAM, AZ-CA
LOCATION - Lat 34°17'44", long 114°08'22" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.03, T.2 N., R.27 E., San Bernardino County, CA, Hydrologic Unit 15030104, San Bernardino meridian, on north end of powerplant at Parker Dam, 13 mi northeast of Parker, AZ, and 14 mi upstream from Headgate Rock Dam.
DRAINAGE AREA - 182,700 mi² of which 4,000 mi² probably is noncontributing. in the Great Divide basin in southern Wyoming.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Feb. to Sept. 1934 (gage heights and fragmentary discharge records), Oct. 1934 to current year. Prior to Oct. 1937, published as near Parker, Ariz.
GAGE - Water-stage recorder.
REMARKS - Record is rated good except estimated days which are fair. Flow regulated by Hoover Dam (Lake Mead) since Feb. 1, 1935, by Davis Dam (Lake Mohave) since Jan. 17, 1950, and by Parker Dam (Lake Havasu) since July 1, 1938. Many diversions above station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 42,400 ft³/s Feb. 8, 1937; no flow at Parker Dam for parts of several days in 1942 when gates in dam were closed. An unregulated discharge of probably less than 1,350 ft³/s occurred Aug. 18, 1934 (lowest unregulated discharge since 1917 and probably since a much earlier date).
Water-Data Report 2020
09427520 COLORADO RIVER BELOW PARKER DAM, AZ-CA -- Continued
DISCHARGE, CUBIC FEET PER SECOND
YEAR 2019-10-01 to 2020-09-30
DAILY MEAN VALUES
Day Oct
 2019
15,960
25,430
35,810
49,070
57,940
67,450
77,040
86,460
96,830
103,960
116,950
127,130
137,000
146,610
156,510
166,320
174,330
187,730
197,690
208,220
218,900
228,180
238,030
244,000
256,830
267,610
278,750
287,440
296,500
306,120
313,400
Total210,200
Mean6,781
Max9070
Min3400
Ac-ft416,900
Day Nov
2019
16,890
26,590
36,320
45,720
55,670
65,740
73,700
86,980
97,010
107,450
117,140
126,380
135,500
143,780
156,140
166,820
176,750
186,520
195,410
204,060
213,050
223,100
233,590
243,680
255,130
264,510
273,150
283,160
293,450
303,440
 -- 
Total156,800
Mean5,228
Max7450
Min3050
Ac-ft311,100
Day Dec
2019
13,600
23,560
33,170
43,160
53,170
63,230
73,490
83,430
93,880
103,190
113,130
123,140
133,320
143,470
153,960
164,210
174,880
183,750
193,550
203,650
213,490
223,330
233,470
243,290
253,220
263,220
273,200
283,180
293,160
303,460
313,570
Total107,500
Mean3,469
Max4880
Min3130
Ac-ft213,300
Day Jan
2020
13,330
23,220
34,790
45,890
56,260
64,000
74,580
83,160
92,710
103,270
114,090
124,780
136,360
146,760
154,230
162,730
173,420
183,670
196,230
206,610
217,400
226,900
234,180
248,210
258,950
268,940
279,760
289,660
299,710
305,280
3110,200
Total179,300
Mean5,783
Max10200
Min2710
Ac-ft355,600
Day Feb
2020
110,900
211,400
310,200
46,710
56,010
63,210
76,730
86,580
96,480
105,900
114,450
123,790
133,150
147,340
157,650
168,380
178,470
187,970
196,410
203,660
215,370
228,130
238,340
249,750
259,390
269,570
273,190
289,080
298,910
 -- 
 -- 
Total207,100
Mean7,141
Max11400
Min3150
Ac-ft410,800
Day Mar
2020
19,380
29,870
39,500
48,960
53,190
69,460
79,430
87,350
96,100
105,990
113,800
123,130
134,040
144,190
154,150
164,140
173,860
183,760
193,650
205,950
216,340
227,190
237,530
247,940
259,200
269,120
2710,600
2811,900
2912,700
3012,900
3111,800
Total227,100
Mean7,326
Max12900
Min3130
Ac-ft450,500
Day Apr
2020
19,120
27,500
310,400
411,500
510,100
67,690
76,300
85,070
95,250
1011,300
117,640
126,270
137,270
149,230
1512,600
168,480
1712,300
1814,100
1915,900
2018,300
2114,100
229,400
236,200
2415,200
2515,700
2616,200
2713,800
2812,200
2912,200
305,020
 -- 
Total316,300
Mean10,550
Max18300
Min5020
Ac-ft627,500
Day May
2020
113,900
213,800
313,800
413,100
511,300
611,500
79,290
811,600
915,100
1014,800
1113,900
1214,800
1312,400
149,730
1513,000
1614,400
1712,500
1813,100
1914,500
2014,500
218,210
2214,000
2314,700
2416,000
2513,900
2614,500
2713,900
287,920
2915,700
3015,700
3117,200
Total412,800
Mean13,310
Max17200
Min7920
Ac-ft818,700
Day Jun
2020
117,300
214,400
313,500
46,670
514,100
613,900
713,600
813,000
912,600
1012,300
116,230
1213,300
1313,900
1414,400
1513,200
1612,500
1711,600
187,720
1911,000
2013,200
2114,300
2211,800
2314,300
2411,800
256,940
2612,400
2712,800
2812,300
2913,000
3012,900
 -- 
Total371,000
Mean12,360
Max17300
Min6230
Ac-ft735,800
Day Jul
2020
111,700
27,250
314,600
413,100
512,400
611,800
712,000
811,900
97,970
1013,600
1113,500
1212,100
1311,400
1411,100
1511,300
166,380
1713,400
1813,700
1914,400
2013,600
2112,200
2213,000
235,910
2414,300
2514,200
2613,100
2711,900
2812,100
2911,500
3011,300
3110,200
Total366,900
Mean11,840
Max14600
Min5910
Ac-ft727,800
Day Aug
2020
111,300
210,900
311,100
413,300
513,800
611,100
713,000
812,500
912,600
1010,800
1110,300
127,800
136,150
1412,400
1514,200
1613,200
1710,600
1811,200
1910,800
207,760
2112,400
2210,900
2310,800
2410,100
2510,000
269,390
276,400
2812,300
2912,300
3011,300
3110,200
Total340,900
Mean11,000
Max14200
Min6150
Ac-ft676,200
Day Sep
2020
19,470
29,300
35,390
410,400
510,100
69,370
79,360
89,170
911,000
106,690
1110,000
129,940
1310,500
1410,500
159,970
167,460
175,900
1810,300
199,220
2010,800
2110,400
2210,200
2311,400
247,660
259,510
2611,000
279,930
288,280
297,940
307,070
 -- 
Total278,200
Mean9,274
Max11400
Min5390
Ac-ft551,900
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 2020, BY WATER YEAR (WY)
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Mean 9,878 8,609 8,404 8,906 10,390 12,700 13,640 13,000 14,080 14,520 13,250 11,720
Max 35,820 29,090 33,210 31,830 28,810 28,310 27,039 29,380 32,470 39,680 39,390 38,080
(WY) (1984) (1942) (1942) (1942) (1984) (1984) (1984) (1986) (1984) (1983) (1983) (1983)
Min 3,638 3,686 2,761 1,639 3,481 7,106 7,085 8,064 9,181 9,780 7,720 6,722
(WY) (1973) (1983) (1968) (1993) (1993) (1935) (1935) (1940) (1937) (1938) (2014) (1976)
Water-Data Report 2020
09427520 COLORADO RIVER BELOW PARKER DAM, AZ-CA -- Continued
SUMMARY STATISTICS
Water Year 2020 Water Years 1935 - 2020
Annual total 3,174,000                   
Annual mean 8,673          11,630         
Highest annual mean           29,100          1984
Lowest annual mean           7,552          1993
Highest daily mean 18,300          Apr 20 40,500          Aug 15, 1983
Lowest daily mean 2,710          Jan 09 30.0        Jan 05, 1995
Annual 7-day minimum 3,247          Dec 24 742.1        Jan 04, 1995
Maximum peak flow           42,400a         Feb 08, 1937
Maximum peak stage           77.29       Jun 29, 1983
Annual runoff (cfsm) 0.048      0.064     
Annual runoff (inches) 0.646      0.863     
10 percent exceeds 13,900          18,400         
50 percent exceeds 8,360          11,100         
90 percent exceeds 3,467          5,180         
a Discharge affected by Regulation or Diversion
USGS Water-data graph for site USGS 09427520