USGS Water-Year Summary for Site USGS 09070500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00400 pH(Med.,Min.,Max.)
	63680 Turbidity, Form Neph(Max.,Min.,Med.)

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

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USGS Water-Year Summary 2020

09070500 COLORADO RIVER NEAR DOTSERO, CO

LOCATION - Lat 39°38'40.60", long 107°04'40.85" referenced to North American Datum of 1983, in NW 1/4 SE 1/4 sec.06, T.5 S., R.86 W., Eagle County, CO, Hydrologic Unit 14010001, on right bank about 100 ft south of Interstate Highway 70, 1.5 mi west of Dotsero, and 1.5 mi downstream from Eagle River.

DRAINAGE AREA - 4,390 mi².

REVISIONS HISTORY - WDR-US-2011: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1940 to current year.

GAGE - Water-stage recorder with satellite telemetry and two crest-stage gages. Elevation of gage is 6,130 ft above NGVD of 1929, from topographic map. Prior to Oct. 5, 2007, gage located on left bank 80 ft upstream at same datum.

REMARKS - Water year 2014; records good except for estimated daily discharges, which are poor. Water year 2015; records good except for estimated daily discharges, which are poor. Water year 2016; records good except for estimated daily discharges, which are poor. Water year 2017; records good except for estimated daily discharges, which are poor. Water year 2018; records good except for estimated daily discharges, which are poor. Water year 2019; records good except for estimated daily discharges, which are poor. Water year 2020; records good except for estimated daily discharges, which are poor. Water year 2021; records good except for estimated daily discharges, which are poor. Water year 2022; records good except for estimated daily discharges, which are poor. Water year 2023; records good except for estimated daily discharges, which are poor. Natural flow of stream affected by transmountain diversions, storage reservoirs, power development, diversions for irrigation of about 68,000 acres upstream from station, and return flow from irrigated areas.

DISCHARGE, CUBIC FEET PER SECOND
YEAR 2019-10-01 to 2020-09-30
DAILY MEAN VALUES
[e, Value has been estimated.]

Day	Oct
	2019
1	1,540
2	1,500
3	1,520
4	1,540
5	1,520
6	1,530
7	1,530
8	1,520
9	1,520
10	1,500
11	1,500
12	1,490
13	1,480
14	1,470
15	1,470
16	1,460
17	1,470
18	1,480
19	1,500
20	1,500
21	1,490
22	1,500
23	1,510
24	1,570
25	1,550
26	1,510
27	1,520
28	1,520
29	1,540
30	1,520
31	e1,340
Total	46,610
Mean	1,504
Max	1570
Min	1340
Ac-ft	92,450

Day	Nov
2019
1	e1,280
2	1,250
3	1,170
4	1,150
5	1,170
6	1,150
7	1,120
8	1,120
9	1,100
10	1,090
11	1,100
12	1,030
13	993
14	996
15	1,030
16	1,030
17	1,030
18	1,030
19	1,040
20	1,030
21	1,050
22	1,070
23	1,020
24	970
25	957
26	982
27	e847
28	e874
29	e941
30	e937
--
Total	31,560
Mean	1,052
Max	1280
Min	847
Ac-ft	62,590

Day	Dec
2019
1	e772
2	e740
3	e946
4	e964
5	e965
6	974
7	938
8	932
9	964
10	914
11	865
12	885
13	976
14	963
15	e785
16	e658
17	e518
18	e442
19	e571
20	e790
21	e850
22	e879
23	e915
24	e970
25	e997
26	e984
27	e923
28	e835
29	e711
30	e646
31	e594
Total	25,870
Mean	834
Max	997
Min	442
Ac-ft	51,300

Day	Jan
2020
1	e600
2	e773
3	e825
4	e807
5	e818
6	e831
7	e841
8	e840
9	e807
10	e745
11	e659
12	e621
13	e672
14	e779
15	e783
16	e782
17	e714
18	e652
19	e647
20	e652
21	e712
22	e789
23	e805
24	e806
25	e805
26	e781
27	e744
28	e722
29	e675
30	e670
31	e668
Total	23,030
Mean	743
Max	841
Min	600
Ac-ft	45,670

Day	Feb
2020
1	e670
2	e673
3	e651
4	e576
5	e629
6	e718
7	e802
8	e869
9	905
10	838
11	e829
12	e824
13	e836
14	e838
15	e872
16	e887
17	873
18	835
19	796
20	e750
21	e686
22	e738
23	e792
24	788
25	e756
26	e676
27	e723
28	e777
29	e773
--
--
Total	22,380
Mean	772
Max	905
Min	576
Ac-ft	44,390

Day	Mar
2020
1	e785
2	e823
3	e839
4	e814
5	e821
6	e820
7	e837
8	e881
9	e932
10	e965
11	964
12	996
13	1,040
14	1,020
15	979
16	989
17	998
18	992
19	1,030
20	1,000
21	942
22	912
23	909
24	872
25	953
26	1,060
27	1,080
28	1,090
29	1,030
30	997
31	987
Total	29,360
Mean	947
Max	1090
Min	785
Ac-ft	58,230

Day	Apr
2020
1	1,010
2	1,080
3	1,120
4	1,100
5	1,090
6	1,100
7	1,160
8	1,240
9	1,320
10	1,420
11	1,490
12	1,550
13	1,500
14	1,330
15	1,260
16	1,260
17	1,320
18	1,320
19	1,370
20	1,390
21	1,400
22	1,370
23	1,360
24	1,470
25	1,520
26	1,530
27	1,610
28	1,830
29	2,190
30	2,510
--
Total	42,220
Mean	1,407
Max	2510
Min	1010
Ac-ft	83,740

Day	May
2020
1	2,750
2	3,270
3	3,580
4	3,920
5	3,690
6	3,480
7	3,510
8	3,440
9	3,350
10	3,280
11	3,390
12	3,800
13	3,960
14	4,120
15	4,150
16	4,120
17	4,250
18	4,600
19	5,200
20	5,580
21	5,560
22	5,050
23	4,780
24	4,450
25	4,130
26	3,810
27	3,700
28	4,030
29	4,490
30	5,310
31	6,640
Total	129,399
Mean	4,174
Max	6640
Min	2750
Ac-ft	256,600

Day	Jun
2020
1	7,420
2	7,680
3	7,500
4	6,970
5	6,100
6	5,710
7	5,580
8	4,780
9	4,430
10	4,010
11	3,590
12	3,280
13	3,330
14	3,370
15	3,370
16	3,030
17	2,870
18	2,750
19	2,680
20	2,600
21	2,510
22	2,380
23	2,380
24	2,330
25	2,390
26	2,660
27	2,850
28	2,820
29	2,760
30	2,650
--
Total	116,800
Mean	3,893
Max	7680
Min	2330
Ac-ft	231,600

Day	Jul
2020
1	2,470
2	2,310
3	2,110
4	1,920
5	1,990
6	2,000
7	2,000
8	1,900
9	1,810
10	1,770
11	1,640
12	1,560
13	1,510
14	1,490
15	1,510
16	1,530
17	1,580
18	1,460
19	1,410
20	1,370
21	1,340
22	1,300
23	1,320
24	1,360
25	1,380
26	1,550
27	1,580
28	1,470
29	1,440
30	1,470
31	1,380
Total	50,930
Mean	1,643
Max	2470
Min	1300
Ac-ft	101,000

Day	Aug
2020
1	1,390
2	1,430
3	1,480
4	1,500
5	1,500
6	1,470
7	1,480
8	1,560
9	1,590
10	1,580
11	1,550
12	1,530
13	1,580
14	1,540
15	1,480
16	1,450
17	1,450
18	1,460
19	1,460
20	1,430
21	1,380
22	1,350
23	1,340
24	1,330
25	1,320
26	1,300
27	1,270
28	1,260
29	1,310
30	1,380
31	1,420
Total	44,570
Mean	1,438
Max	1590
Min	1260
Ac-ft	88,400

Day	Sep
2020
1	1,350
2	1,300
3	1,260
4	1,240
5	1,240
6	1,270
7	1,240
8	1,290
9	1,320
10	1,310
11	1,230
12	1,110
13	1,070
14	989
15	984
16	1,040
17	1,040
18	1,010
19	998
20	1,030
21	1,040
22	1,040
23	1,070
24	1,100
25	1,130
26	1,200
27	1,210
28	1,210
29	1,230
30	1,160
--
Total	34,710
Mean	1,157
Max	1350
Min	984
Ac-ft	68,850

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2020, BY WATER YEAR (WY)
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
Mean	1,247	1,056	921	882	893	1,029	1,818	4,675	6,247	3,105	1,706	1,344
Max	2,038	1,664	1,503	1,472	1,603	1,961	5,601	10,770	15,380	10,760	4,055	2,616
(WY)	(1963)	(1963)	(1985)	(1985)	(1962)	(1962)	(1962)	(1984)	(2011)	(2011)	(1984)	(1984)
Min	707	677	521	504	529	610	877	1,254	1,220	1,021	912	661
(WY)	(2003)	(1978)	(1943)	(1941)	(1943)	(1964)	(2013)	(2002)	(2002)	(1963)	(2002)	(2002)

SUMMARY STATISTICS
	Water Year 2020		Water Years 1941 - 2020
Annual total	597,400
Annual mean	1,632		2,079
Highest annual mean			4,173	1984
Lowest annual mean			898.1	2002
Highest daily mean	7,680	Jun 02	20,800	May 25, 1984
Lowest daily mean	442.0	Dec 18	317.0	Dec 22, 2012
Annual 7-day minimum	648.1	Jan 30	417.1	Jan 13, 1944
Maximum peak flow	8,060^a	Jun 02	22,200^a	May 25, 1984
Maximum peak stage	7.93	Jun 02	14.20	May 25, 1984
Annual runoff (cfsm)	0.372		0.474
Annual runoff (inches)	5.06		6.44
10 percent exceeds	3,452		4,730
50 percent exceeds	1,260		1,260
90 percent exceeds	772.7		746.0

^a Discharge affected by Regulation or Diversion

USGS Water-data graph for site USGS 09070500