USGS Water-Year Summary for Site USGS 09423000

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	00060 Discharge(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2020

09423000 COLORADO RIVER BELOW DAVIS DAM, AZ-NV

LOCATION - Lat 35°11'30", long 114°34'17" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.01, T.32 S., R.66 E., Clark County, NV, Hydrologic Unit 15030101, Mount Diablo meridian, on right bank 0.5 mi downstream from Davis Dam, 29 mi west of Kingman, AZ, and 68 mi downstream from Hoover Dam.

DRAINAGE AREA - 173,300 mi² of which 4,000 mi² probably is noncontributing. in the Great Divide basin in southern Wyoming.

REVISIONS HISTORY - WDR AZ-86-1: 1981.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1905 to September 1907 (published as "at Hardyville"), March 1949 to current year.

GAGE - Water-stage recorder.

REMARKS - Record is rated good. Flow regulated by Hoover Dam (Lake Mead) since February 1, 1935, and by Davis Dam (Lake Mohave) since January 17, 1950. Many diversions upstream for irrigation, industrial and municipal uses.

EXTREMES FOR PERIOD OF RECORD - 1905-1907: Maximum daily discharge, 116,000 ft³/s June 20, 1906; minimum daily, 2,850 ft³/s January 5, 1906. 1949-2002: Maximum discharge, 46,200 ft³/s July 2, 1983, elevation, 509.48 ft.; maximum elevation, 513.91 ft. April 22, 1952; no flow at Davis Dam parts of several days July to September 1950 and December 27, 1950, when gates in dam were closed; minimum daily discharge, 285 ft³/s August 3, 1950.

DISCHARGE, CUBIC FEET PER SECOND
YEAR 2019-10-01 to 2020-09-30
DAILY VALUES

Day	Max	Min	Mean
	October
1	9,770	4,630	7,860
2	9,840	4,580	7,010
3	14,800	4,750	8,370
4	19,600	4,850	12,100
5	19,800	4,810	12,500
6	19,900	4,660	12,600
7	19,900	4,760	12,500
8	15,000	4,780	10,200
9	20,100	4,620	10,500
10	19,700	4,580	10,300
11	19,900	4,580	10,300
12	20,000	4,830	10,300
13	20,000	4,750	10,200
14	19,900	4,710	10,500
15	20,000	4,710	10,600
16	15,200	4,780	9,290
17	15,200	4,760	9,230
18	15,300	4,780	9,660
19	15,200	4,800	9,660
20	15,400	4,810	10,000
21	9,940	9,570	9,670
22	9,760	9,550	9,680
23	9,760	9,620	9,690
24	9,780	9,520	9,660
25	20,700	4,900	11,500
26	20,000	4,920	11,400
27	20,300	5,000	11,300
28	20,300	4,850	10,900
29	14,800	4,870	9,040
30	14,800	4,830	9,060
31	14,900	4,730	9,070
Total	509,499	166,900	314,600
Mean	16,440	5,384	10,150
Max	20700	9620	12600
Min	9760	4580	7010
Ac-ft	1,011,000	331,000	624,100

Day	Max	Min	Mean
November
1	15,000	4,930	11,200
2	15,100	4,750	11,200
3	15,200	4,710	10,800
4	15,200	4,780	10,900
5	9,760	4,810	7,310
6	9,760	4,870	7,190
7	9,700	4,830	7,220
8	14,900	4,780	8,080
9	14,900	4,900	9,100
10	14,900	4,930	9,100
11	14,700	4,780	8,790
12	14,900	4,730	8,780
13	15,000	4,850	8,770
14	14,800	4,950	9,320
15	15,000	4,900	9,400
16	15,000	4,950	9,370
17	15,200	4,880	8,900
18	14,600	4,870	8,770
19	14,800	4,800	8,750
20	11,000	4,370	8,260
21	12,100	4,530	7,850
22	9,840	4,780	5,970
23	9,490	4,780	6,240
24	9,390	4,760	6,240
25	9,620	4,620	6,250
26	9,160	4,450	5,760
27	5,120	4,780	4,980
28	5,110	4,850	4,960
29	9,390	4,470	5,610
30	9,360	4,450	5,590
--
Total	368,000	142,800	240,700
Mean	12,270	4,761	8,022
Max	15200	4950	11200
Min	5110	4370	4960
Ac-ft	729,900	283,300	477,300

Day	Max	Min	Mean
December
1	4,850	4,750	4,810
2	4,870	4,420	4,690
3	4,630	4,440	4,550
4	4,550	2,690	3,420
5	2,800	2,680	2,770
6	2,870	2,720	2,770
7	2,880	2,720	2,790
8	2,810	2,740	2,790
9	4,830	2,780	4,700
10	9,700	4,660	5,580
11	4,810	2,650	3,980
12	4,780	4,660	4,720
13	4,850	4,700	4,730
14	4,830	4,550	4,760
15	4,870	4,520	4,710
16	4,870	4,620	4,720
17	4,810	4,580	4,710
18	4,920	4,580	4,710
19	4,920	4,500	4,580
20	4,620	4,500	4,550
21	4,620	4,500	4,550
22	4,570	4,520	4,540
23	9,010	4,550	5,140
24	4,620	4,370	4,520
25	8,880	4,220	5,110
26	4,600	4,490	4,520
27	4,530	4,500	4,520
28	4,570	4,470	4,520
29	4,580	4,450	4,520
30	4,550	4,470	4,510
31	4,530	4,450	4,490
Total	152,100	127,500	136,000
Mean	4,907	4,111	4,386
Max	9700	4750	5580
Min	2800	2650	2770
Ac-ft	301,700	252,800	269,700

Day	Max	Min	Mean
January
1	4,530	4,440	4,490
2	4,530	4,440	4,480
3	4,580	4,420	4,490
4	4,520	4,470	4,490
5	4,500	4,440	4,470
6	9,180	4,470	5,430
7	9,600	4,800	5,840
8	9,600	4,760	5,830
9	9,650	4,760	6,390
10	9,570	4,660	5,800
11	9,520	4,660	5,990
12	9,520	4,680	5,780
13	9,490	4,680	5,760
14	9,550	4,680	5,760
15	9,570	4,680	6,330
16	9,390	4,710	6,340
17	9,390	4,500	6,330
18	9,520	4,420	6,690
19	9,440	4,660	6,080
20	9,440	4,650	6,270
21	9,470	4,660	6,190
22	9,440	4,530	6,210
23	9,440	4,550	6,520
24	9,440	4,750	6,980
25	9,470	4,730	7,330
26	9,470	4,680	7,700
27	14,200	4,730	8,120
28	14,100	4,620	9,110
29	9,470	4,660	6,880
30	14,200	4,630	9,160
31	14,100	4,600	9,070
Total	287,900	143,100	196,300
Mean	9,287	4,617	6,333
Max	14200	4800	9160
Min	4500	4420	4470
Ac-ft	571,000	283,900	389,400

Day	Max	Min	Mean
February
1	14,000	4,580	9,070
2	14,000	4,660	9,090
3	14,000	4,530	9,030
4	14,000	4,530	8,950
5	14,100	4,450	8,120
6	14,300	4,520	7,940
7	13,900	4,570	8,980
8	13,800	4,660	8,990
9	13,800	4,620	8,570
10	13,900	4,570	8,350
11	9,230	4,620	7,570
12	9,110	2,960	6,190
13	9,160	4,130	5,910
14	9,490	4,500	6,920
15	9,310	4,570	6,900
16	9,310	4,500	6,920
17	14,200	4,500	8,430
18	13,700	4,550	9,950
19	13,600	4,530	8,520
20	13,800	4,550	8,880
21	13,900	4,520	8,500
22	18,400	4,570	9,360
23	18,500	4,570	9,960
24	13,500	4,570	11,100
25	13,500	8,510	11,200
26	13,800	4,520	11,100
27	13,600	8,810	12,700
28	13,500	8,630	13,000
29	13,900	8,660	13,000
--
--
Total	383,300	146,500	263,200
Mean	13,220	5,050	9,076
Max	18500	8810	13000
Min	9110	2960	5910
Ac-ft	760,300	290,500	522,100

Day	Max	Min	Mean
March
1	13,900	8,630	12,000
2	13,900	8,610	11,900
3	13,800	13,300	13,500
4	13,500	8,540	11,300
5	13,600	8,350	12,000
6	13,700	8,530	12,200
7	13,600	8,330	12,000
8	13,600	5,040	11,000
9	13,800	4,410	9,520
10	13,500	4,340	9,700
11	13,700	4,410	8,860
12	8,670	4,280	5,550
13	8,650	3,450	4,760
14	8,760	2,480	4,910
15	4,410	2,500	3,620
16	8,690	2,370	3,830
17	8,500	2,330	3,830
18	8,580	2,320	4,450
19	8,860	2,330	4,150
20	8,430	2,320	3,780
21	8,740	4,280	5,420
22	8,720	4,250	5,430
23	8,700	4,250	5,730
24	13,400	4,200	8,910
25	13,300	4,230	9,440
26	14,900	4,280	10,200
27	18,600	8,510	12,600
28	18,700	8,560	14,000
29	19,600	8,470	15,300
30	18,900	10,900	15,800
31	19,000	8,760	15,300
Total	386,700	177,600	281,000
Mean	12,470	5,728	9,064
Max	19600	13300	15800
Min	4410	2320	3620
Ac-ft	767,000	352,200	557,300

Day	Max	Min	Mean
April
1	19,200	8,600	14,600
2	19,000	13,600	15,700
3	18,900	13,800	15,500
4	23,400	8,640	16,300
5	23,400	8,960	16,600
6	19,100	8,940	15,700
7	19,000	8,730	13,600
8	18,900	8,660	12,600
9	19,100	8,790	11,800
10	18,900	8,560	12,300
11	14,200	8,640	11,400
12	14,200	4,500	10,300
13	19,100	4,260	11,300
14	23,400	4,200	12,700
15	23,300	4,310	11,200
16	19,200	8,540	13,000
17	19,200	8,640	12,800
18	23,800	8,590	16,000
19	23,900	13,900	18,400
20	24,100	14,200	19,900
21	24,100	8,950	16,400
22	19,500	8,850	13,500
23	19,500	8,850	15,000
24	19,600	14,200	17,100
25	24,000	14,200	17,400
26	19,800	14,500	18,100
27	24,300	9,140	16,800
28	24,500	14,400	19,700
29	24,600	14,500	19,800
30	24,600	14,300	18,500
--
Total	627,800	298,900	454,000
Mean	20,930	9,965	15,129
Max	24600	14500	19900
Min	14200	4200	10300
Ac-ft	1,245,000	593,000	900,500

Day	Max	Min	Mean
May
1	24,800	14,500	19,900
2	24,700	14,500	19,800
3	20,100	14,600	16,100
4	24,700	14,400	17,100
5	24,300	14,400	17,800
6	24,300	14,300	18,600
7	24,200	14,300	18,400
8	24,000	14,200	16,900
9	24,100	14,300	17,100
10	24,000	14,200	17,100
11	24,000	14,300	17,500
12	24,200	4,570	17,000
13	23,800	9,030	17,200
14	23,900	14,200	17,600
15	23,700	4,620	17,000
16	23,700	14,100	17,300
17	24,100	14,000	17,300
18	23,600	14,200	16,500
19	23,700	13,900	16,400
20	23,600	13,800	16,500
21	23,500	13,900	17,000
22	23,500	14,000	16,900
23	23,400	13,700	17,400
24	23,400	13,500	17,300
25	23,400	13,700	17,300
26	23,400	8,890	16,100
27	23,300	13,600	17,400
28	23,100	13,800	17,100
29	23,200	13,700	17,400
30	23,100	13,600	18,200
31	23,000	13,000	17,100
Total	733,800	405,800	538,300
Mean	23,670	13,089	17,360
Max	24800	14600	19900
Min	20100	4570	16100
Ac-ft	1,455,000	804,900	1,068,000

Day	Max	Min	Mean
June
1	23,200	12,200	17,400
2	23,100	13,500	17,800
3	22,800	13,200	16,000
4	23,200	13,300	16,000
5	23,000	13,500	16,000
6	23,100	8,950	16,700
7	23,100	8,830	16,600
8	23,100	8,830	16,500
9	23,200	8,980	16,000
10	23,100	8,950	15,900
11	23,200	8,880	15,100
12	23,200	8,930	15,000
13	23,600	8,950	16,600
14	23,600	8,830	16,600
15	23,400	8,980	16,900
16	23,200	4,700	14,100
17	18,900	8,810	13,600
18	23,200	8,910	15,900
19	23,300	8,910	16,100
20	23,900	8,930	16,200
21	18,800	8,910	15,000
22	18,800	13,600	15,700
23	18,600	13,600	15,000
24	18,600	8,980	14,900
25	23,500	9,100	15,400
26	23,800	8,650	15,400
27	18,800	9,120	15,000
28	18,700	8,720	14,900
29	18,600	9,170	15,000
30	18,700	9,100	15,000
--
Total	657,300	294,000	472,300
Mean	21,910	9,801	15,740
Max	23900	13600	17800
Min	18600	4700	13600
Ac-ft	1,303,999	583,200	936,800

Day	Max	Min	Mean
July
1	24,400	9,220	15,600
2	23,200	9,320	15,700
3	18,700	8,790	16,200
4	18,700	8,880	16,100
5	23,400	8,790	16,100
6	18,700	8,740	13,800
7	18,700	8,650	13,800
8	18,600	8,720	13,700
9	18,600	8,880	13,700
10	18,600	8,860	14,100
11	18,700	8,810	14,500
12	18,700	8,830	14,600
13	18,600	8,830	14,500
14	18,300	8,760	14,600
15	18,400	8,740	14,600
16	18,400	8,830	14,600
17	18,800	8,930	14,700
18	18,800	8,410	14,600
19	18,800	9,270	14,800
20	18,900	9,270	14,700
21	18,900	9,240	14,600
22	18,900	9,320	14,700
23	23,900	9,220	14,700
24	18,900	9,290	14,600
25	19,100	9,070	14,700
26	18,800	9,220	14,700
27	19,000	9,150	14,100
28	18,900	9,220	13,700
29	18,900	9,170	13,800
30	23,600	9,270	14,500
31	18,900	9,370	14,300
Total	605,800	279,100	453,400
Mean	19,540	9,002	14,630
Max	24400	9370	16200
Min	18300	8410	13700
Ac-ft	1,202,000	553,500	899,300

Day	Max	Min	Mean
August
1	18,600	9,370	13,700
2	18,600	8,860	13,600
3	18,600	8,760	13,600
4	23,400	4,830	13,700
5	23,600	9,250	14,800
6	24,000	9,130	15,600
7	23,500	9,340	15,700
8	23,400	9,340	15,400
9	19,200	9,350	14,300
10	19,200	9,330	14,700
11	23,000	4,830	14,000
12	21,500	4,780	13,500
13	20,400	4,760	13,400
14	23,900	4,750	13,500
15	23,700	4,830	13,500
16	19,200	4,800	13,600
17	25,100	4,750	14,400
18	25,700	4,800	14,800
19	25,600	4,750	14,600
20	23,800	4,870	13,400
21	23,600	4,760	12,600
22	23,700	4,220	12,600
23	23,600	4,100	12,600
24	24,200	4,160	13,700
25	24,100	4,140	13,500
26	23,900	4,330	12,600
27	14,600	2,720	5,960
28	24,000	4,650	15,700
29	24,600	9,360	17,300
30	24,100	9,320	17,500
31	19,500	4,700	12,700
Total	693,900	191,900	430,600
Mean	22,380	6,192	13,890
Max	25700	9370	17500
Min	14600	2720	5960
Ac-ft	1,376,000	380,700	854,000

Day	Max	Min	Mean
September
1	24,400	4,760	12,600
2	19,600	4,630	12,800
3	24,300	4,570	15,000
4	24,700	4,760	14,900
5	25,900	4,810	14,900
6	25,900	4,700	16,200
7	26,000	4,970	16,200
8	20,000	4,760	13,200
9	22,400	4,650	13,300
10	14,500	2,700	4,300
11	20,000	10,200	16,300
12	20,000	9,440	16,900
13	20,100	14,400	17,800
14	20,100	9,550	14,500
15	20,300	9,600	14,500
16	20,300	9,840	14,900
17	20,300	9,810	14,700
18	20,400	9,810	14,700
19	20,800	9,840	14,700
20	20,500	9,860	14,700
21	20,500	9,890	14,700
22	20,400	9,920	15,800
23	18,200	7,530	13,300
24	20,800	8,960	12,700
25	20,500	4,880	13,100
26	20,800	4,950	13,800
27	26,100	4,850	15,100
28	20,900	10,000	14,900
29	20,700	5,110	13,500
30	23,600	10,000	16,700
--
Total	643,000	223,800	430,700
Mean	21,430	7,458	14,360
Max	26100	14400	17800
Min	14500	2700	4300
Ac-ft	1,275,000	443,800	854,300

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1905 - 2020, BY WATER YEAR (WY)
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
Mean	11,190	9,763	9,335	9,816	11,570	15,010	17,480	17,080	19,570	18,270	15,620	13,530
Max	37,170	28,799	26,410	30,390	30,420	28,830	31,720	64,449	95,310	75,280	40,560	39,590
(WY)	(1984)	(1984)	(1985)	(1984)	(1984)	(1984)	(1907)	(1906)	(1906)	(1907)	(1983)	(1983)
Min	5,158	4,201	2,939	2,562	1,758	5,595	10,970	11,850	12,790	13,210	11,430	6,973
(WY)	(1973)	(1983)	(1966)	(1993)	(1993)	(1993)	(1965)	(1951)	(1982)	(2012)	(2014)	(1905)

SUMMARY STATISTICS
	Water Year 2020		Water Years 1905 - 2020
Annual total	4,211,000
Annual mean	11,510		13,740
Highest annual mean			30,870	1984
Lowest annual mean			9,809	1993
Highest daily mean	19,900	Apr 20	116,000	Jun 20, 1906
Lowest daily mean	2,770	Dec 05	285.0	Aug 03, 1950
Annual 7-day minimum	3,397	Dec 02	1,390	Feb 22, 2005
Maximum peak flow			46,200^a	Jul 02, 1983
Maximum peak stage			513.91^b	Apr 22, 1952
Annual runoff (cfsm)	0.066		0.081
Annual runoff (inches)	0.904		1.10
10 percent exceeds	17,000		19,900
50 percent exceeds	12,600		13,500
90 percent exceeds	4,720		6,850

^a Discharge affected by Regulation or Diversion
^b Gage height at different site and(or) datum

USGS Water-data graph for site USGS 09423000