Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site USGS 09380000

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Mean)  

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

Print this page
USGS Water-Year Summary 2020
09380000 COLORADO RIVER AT LEES FERRY, AZ
LOCATION - Lat 36°51'51.60", long 111°35'16.34" referenced to North American Datum of 1983, Coconino County, AZ, Hydrologic Unit 14070006, on left bank at head of Marble Gorge at Lees Ferry, immediately above mouth of the Paria River, 28 miles downstream from the Utah state line, 16 miles downstream from Glen Canyon Dam, 61.5 miles upstream from the mouth of Little Colorado River, 87.4 miles upstream from gage near Grand Canyon, and 355 miles upstream from Hoover Dam. By road, it is 7 miles northeast of Marble Canyon and 130 miles north of Flagstaff.
DRAINAGE AREA - 111,800 mi². approximately, including 3,959 mi² in Great Divide Basin in southern Wyoming which is non-contributing (previously considered part of the Missouri River basin).
REVISIONS HISTORY - WSP 859: 1921-23. WSP 1313: 1914-21.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Jan. 1895 to current year. Estimates of monthly and annual discharge only for some periods, published in WSP 1313.
GAGE - Water-stage recorder. Datum of gage is 3,106.16 ft above sea level. Prior to Jan. 19, 1923, nonrecording gages or reference points within 400 ft of present gage, at different datums.
REMARKS - Records excellent. Flow regulated since Mar. 13, 1963, by Lake Powell, 16 mi upstream. Many diversions above Lake Powell for irrigation, municipal, and industrial use. No diversions or inflow between Lake Powell and the gage.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge since at least 1868, about 300,000 ft³/s July 7, 1884, gage height, 31.5 ft, present site and datum, from floodmark at mouth of Paria River, from rating curve extended above 120,000 ft³/s on basis of discharge computed for flood of June 18, 1921, for station near Grand Canyon.
EXTREMES FOR PERIOD OF RECORD - 1895-1962: Maximum discharge, 220,000 ft³/s, June 18, 1921, gage height, 26.5 ft, from floodmarks, from rating curve extended above 120,000 ft³/s on basis of discharge computed for station near Grand Canyon; minimum, 750 ft³/s, Dec. 27, 1924. 1963-Curent year: Maximum discharge, 97,300 ft³/s, June 29, 1983, gage height, 18.14 ft; minimum daily, 700 ft³/s, Jan. 23, 24, 1963, result of closing coffer dam at Glen Canyon Dam.
AVERAGE DISCHARGE FOR PERIOD OF RECORD - 51 years (water years 1912-62), 17,850 ft³/s, 12,930,000 acre-ft/yr.
Water-Data Report 2020
09380000 COLORADO RIVER AT LEES FERRY, AZ -- Continued
DISCHARGE, CUBIC FEET PER SECOND
YEAR 2019-10-01 to 2020-09-30
DAILY MEAN VALUES
[e, Value has been estimated.]
Day Oct
 2019
111,000
210,600
310,500
410,400
59,570
69,440
710,900
810,700
910,700
1010,700
1110,700
1210,300
139,280
1410,100
1510,500
1610,400
1710,400
1810,000
1910,300
209,090
2110,300
2210,700
2310,500
2410,600
2510,500
269,870
279,230
2810,300
2910,600
3010,500
3110,400
Total319,100
Mean10,290
Max11000
Min9090
Ac-ft632,900
Day Nov
2019
110,900
210,100
39,500
410,900
510,800
611,200
711,100
811,100
910,100
109,530
1110,900
1210,900
1310,600
1410,800
1510,800
169,650
179,450
1810,800
1911,000
2011,300
2111,100
2211,200
2310,000
249,540
2511,000
2611,300
2711,200
289,600
2911,000
3010,200
 -- 
Total317,600
Mean10,590
Max11300
Min9450
Ac-ft629,900
Day Dec
2019
110,700
212,300
312,800
412,400
512,900
612,800
712,400
811,200
912,400
1012,800
1112,700
1212,700
1312,700
1412,100
1511,000
1612,500
1713,200
1813,000
1913,100
2012,700
2112,700
2211,100
2312,600
2412,600
2510,700
2612,200
2712,700
2812,300
2910,900
3012,300
3112,700
Total381,200
Mean12,300
Max13200
Min10700
Ac-ft756,100
Day Jan
2020
110,900
212,500
312,600
412,600
510,600
612,200
712,700
812,700
912,900
1012,700
1112,200
1211,100
1312,600
1412,700
1513,000
1612,900
1713,100
1812,800
1911,200
2012,800
2113,000
2213,000
2313,100
2413,000
2512,600
2611,200
2712,700
2813,000
2912,900
3012,800
3112,900
Total387,000
Mean12,480
Max13100
Min10600
Ac-ft767,600
Day Feb
2020
111,300
210,200
312,200
412,500
512,400
612,000
712,300
811,200
910,200
1011,900
1112,300
1212,100
1312,500
1413,100
1511,500
1611,000
1711,700
1812,400
1912,600
2012,700
2112,700
2211,400
2310,200
2412,100
2512,500
2612,600
2712,600
2812,500
2911,600
 -- 
 -- 
Total346,300
Mean11,940
Max13100
Min10200
Ac-ft686,900
Day Mar
2020
110,400
211,900
311,700
411,800
511,800
612,000
711,200
810,400
911,700
1011,900
1112,100
1212,400
1312,400
1411,700
1510,400
1612,100
1712,100
1812,100
1912,400
2012,100
2111,300
2210,200
2312,000
2412,000
2512,100
2612,100
2712,100
2811,600
2910,300
3012,100
3111,900
Total362,300
Mean11,690
Max12400
Min10200
Ac-ft718,600
Day Apr
2020
110,600
211,100
311,100
410,600
59,860
611,000
711,000
811,600
911,100
1011,600
1111,100
129,590
1311,000
1411,200
1511,300
1611,200
1711,400
1811,200
1910,000
2010,900
2111,300
2210,900
2311,200
2411,400
2511,000
269,770
2710,900
2811,200
2911,300
3011,300
 -- 
Total328,700
Mean10,960
Max11600
Min9590
Ac-ft652,000
Day May
2020
110,900
210,600
310,300
410,700
510,800
610,800
711,000
810,800
910,500
1010,300
1110,700
1210,900
1310,800
1410,800
1510,700
1610,500
1710,300
1810,600
1910,700
2010,800
2110,800
2210,900
2310,100
249,800
259,810
2610,300
2710,600
2810,800
2910,900
3010,400
3110,200
Total328,100
Mean10,580
Max11000
Min9800
Ac-ft650,800
Day Jun
2020
112,300
212,100
311,900
411,700
511,900
69,320
78,960
811,200
911,500
1012,100
1112,100
1212,000
139,430
148,960
1511,500
16e12,300
1711,900
1811,700
1911,900
209,390
218,920
2211,500
2312,100
2412,000
2511,900
2611,900
279,380
288,880
2911,500
3012,200
 -- 
Total334,400
Mean11,150
Max12300
Min8880
Ac-ft663,400
Day Jul
2020
113,200
213,700
313,700
410,000
59,470
612,800
713,600
813,400
913,500
1013,700
1110,100
129,430
1313,000
1413,600
1513,500
1613,500
1713,700
1810,000
199,470
2013,100
2114,000
2213,800
2313,800
2414,100
2510,200
269,670
2713,200
2813,700
2913,700
3013,800
3113,600
Total390,000
Mean12,580
Max14100
Min9430
Ac-ft773,600
Day Aug
2020
111,400
211,000
314,700
415,500
515,600
615,400
715,700
811,600
911,100
1015,000
1115,700
1215,300
1315,500
1415,900
1512,100
1611,100
1715,600
1816,500
1915,500
2015,600
2115,300
2211,600
2311,000
2414,700
2515,400
2615,300
2715,100
2815,400
2911,700
3011,100
3113,900
Total436,300
Mean14,070
Max16500
Min11000
Ac-ft865,400
Day Sep
2020
111,000
210,600
310,700
410,700
510,700
69,900
79,470
810,700
910,900
1010,800
1110,800
1210,800
139,460
1410,400
1510,600
1610,800
1710,600
1810,900
1910,800
209,460
2110,500
2210,700
2310,900
2410,900
2510,800
2610,700
279,530
2810,600
2910,900
3010,900
 -- 
Total316,500
Mean10,550
Max11000
Min9460
Ac-ft627,800
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1922 - 2020, BY WATER YEAR (WY)
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Mean 9,586 9,904 9,865 10,080 10,020 10,600 15,550 26,340 30,869 17,990 13,350 10,910
Max 29,230 24,770 25,019 26,270 26,740 24,910 47,800 82,630 94,860 65,300 30,750 34,180
(WY) (1942) (1985) (1987) (1987) (1985) (1997) (1942) (1952) (1957) (1957) (1929) (1927)
Min 1,000 1,000 1,019 1,153 4,008 3,054 1,017 1,010 1,001 977 1,005 1,006
(WY) (1964) (1964) (1964) (1964) (1964) (1963) (1963) (1963) (1964) (1964) (1963) (1963)
Water-Data Report 2020
09380000 COLORADO RIVER AT LEES FERRY, AZ -- Continued
SUMMARY STATISTICS
Water Year 2020 Water Years 1922 - 2020
Annual total 4,248,000                   
Annual mean 11,610          14,600         
Highest annual mean           28,240          1984
Lowest annual mean           3,325          1964
Highest daily mean 16,500          Aug 18 124,000          Jun 12, 1957
Lowest daily mean 8,880          Jun 28 700.0        Jan 23, 1963
Annual 7-day minimum 10,110          Oct 14 932.9        Jul 14, 1964
Maximum peak flow           127,000          Jul 01, 1927
Maximum peak stage           21.15       Jun 12, 1952
Annual runoff (cfsm) 0.104      0.131     
Annual runoff (inches) 1.41       1.77      
10 percent exceeds 13,500          25,600         
50 percent exceeds 11,200          11,100         
90 percent exceeds 10,000          5,080         
USGS Water-data graph for site USGS 09380000