USGS Water-Year Summary for Site USGS 13333000

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	00060 Discharge(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

13333000 GRANDE RONDE RIVER AT TROY, OR

LOCATION - Lat 45°56'45", long 117°27'00" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.04, T.5 N., R.43 E., Wallowa County, OR, Hydrologic Unit 17060106, on left bank, on upstream side of bridge at Troy, 100 ft downstream from Wenaha River and at mile 45.3.

DRAINAGE AREA - 3,275 mi².

REVISIONS HISTORY - WSP 1397: 1946(M), 1948-50.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1944 to current year. Monthly discharge only, August 1944, published in WSP 1317.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,585.98 ft above NGVD of 1929. Aug. 17, 1944 to Sept. 30, 1949, nonrecording gage at datum 10.85 ft lower. Oct. 1, 1949 to Sept. 5, 1963, water-stage recorder at datum 1.15 ft higher. Sept. 6, 1963 to Oct. 19, 1994, water-stage recorder at site 500 ft downstream at present datum.

REMARKS - Flow slightly regulated by Wallowa Lake and small reservoirs. Diversions for irrigation upstream from station, mainly in vicinity of LaGrande, Enterprise and Wallowa; transbasin diversions for irrigation from Big Sheep Creek and tributaries in Imnaha River Basin to Wallowa River Basin and from South Fork Catherine Creek to the Powder River Basin.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 51,800 ft³/s Feb. 9, 1996, gage height, 13.76 ft, from rating curve extended above 20,000 ft³/s; minimum discharge, 321 ft³/s Nov. 25, 1993, result of freezeup, but may have been less during period of ice effect that day.

DISCHARGE, CUBIC FEET PER SECOND
YEAR 2022-10-01 to 2023-09-30
DAILY MEAN VALUES
[e, Value has been estimated.]

Day	Oct
	2022
1	708
2	709
3	687
4	671
5	658
6	638
7	632
8	631
9	629
10	626
11	618
12	611
13	611
14	611
15	606
16	598
17	593
18	590
19	582
20	576
21	585
22	685
23	752
24	726
25	772
26	780
27	769
28	758
29	745
30	722
31	745
Total	20,620
Mean	665
Max	780
Min	576
Ac-ft	40,910

Day	Nov
2022
1	816
2	857
3	807
4	1,030
5	2,840
6	2,350
7	1,820
8	1,590
9	1,400
10	1,260
11	1,140
12	1,060
13	1,050
14	990
15	934
16	885
17	860
18	832
19	773
20	772
21	792
22	872
23	1,010
24	936
25	901
26	923
27	933
28	974
29	925
30	913
--
Total	33,250
Mean	1,108
Max	2840
Min	772
Ac-ft	65,940

Day	Dec
2022
1	930
2	912
3	831
4	773
5	881
6	933
7	879
8	837
9	840
10	932
11	908
12	930
13	933
14	930
15	908
16	871
17	813
18	715
19	708
20	917
21	997
22	811
23	843
24	947
25	1,060
26	1,110
27	2,140
28	4,330
29	3,270
30	2,690
31	2,390
Total	37,970
Mean	1,225
Max	4330
Min	708
Ac-ft	75,310

Day	Jan
2023
1	2,210
2	2,030
3	1,840
4	1,700
5	1,650
6	1,580
7	1,520
8	1,500
9	1,550
10	1,590
11	1,560
12	1,620
13	2,290
14	2,420
15	2,600
16	2,580
17	2,410
18	2,210
19	2,040
20	1,860
21	1,620
22	1,550
23	1,500
24	1,390
25	1,360
26	1,340
27	1,340
28	1,360
29	1,280
30	e931
31	e928
Total	53,359
Mean	1,721
Max	2600
Min	928
Ac-ft	105,800

Day	Feb
2023
1	e1,060
2	1,070
3	1,050
4	1,110
5	1,160
6	1,210
7	1,240
8	1,280
9	1,200
10	1,120
11	1,090
12	1,060
13	1,060
14	1,080
15	1,040
16	992
17	953
18	966
19	974
20	1,000
21	1,200
22	1,320
23	1,250
24	1,160
25	1,040
26	1,070
27	1,100
28	1,080
--
--
--
Total	30,940
Mean	1,105
Max	1320
Min	953
Ac-ft	61,360

Day	Mar
2023
1	1,040
2	999
3	974
4	944
5	966
6	941
7	912
8	888
9	888
10	924
11	923
12	924
13	1,020
14	1,690
15	1,870
16	1,830
17	1,760
18	1,780
19	1,940
20	2,130
21	2,370
22	2,720
23	2,880
24	2,910
25	2,750
26	2,480
27	2,220
28	2,060
29	2,010
30	2,060
31	2,240
Total	52,040
Mean	1,679
Max	2910
Min	888
Ac-ft	103,200

Day	Apr
2023
1	2,660
2	2,980
3	2,800
4	2,590
5	e2,390
6	e2,290
7	2,490
8	2,900
9	3,690
10	5,730
11	9,850
12	9,200
13	7,730
14	6,750
15	6,100
16	6,030
17	6,750
18	7,010
19	6,530
20	5,980
21	5,780
22	5,600
23	5,740
24	6,580
25	7,420
26	8,030
27	8,790
28	9,760
29	10,400
30	12,000
--
Total	182,500
Mean	6,085
Max	12000
Min	2290
Ac-ft	362,100

Day	May
2023
1	13,500
2	13,600
3	13,500
4	e14,100
5	e13,200
6	12,200
7	11,100
8	10,300
9	9,650
10	9,160
11	8,690
12	8,420
13	8,740
14	9,660
15	10,400
16	11,100
17	11,400
18	11,200
19	11,400
20	12,100
21	12,500
22	12,700
23	10,800
24	9,060
25	8,080
26	7,300
27	7,220
28	6,770
29	6,600
30	6,650
31	6,510
Total	317,600
Mean	10,240
Max	14100
Min	6510
Ac-ft	630,000

Day	Jun
2023
1	6,050
2	5,700
3	5,400
4	5,250
5	5,440
6	5,450
7	5,390
8	5,500
9	5,360
10	5,180
11	4,880
12	5,240
13	4,990
14	4,710
15	4,080
16	3,560
17	3,260
18	3,100
19	2,870
20	2,640
21	2,420
22	2,180
23	1,960
24	1,840
25	1,820
26	1,920
27	2,090
28	2,510
29	2,320
30	2,170
--
Total	115,300
Mean	3,842
Max	6050
Min	1820
Ac-ft	228,700

Day	Jul
2023
1	2,070
2	1,990
3	1,810
4	1,640
5	1,470
6	1,360
7	1,260
8	1,180
9	1,110
10	1,030
11	981
12	932
13	856
14	817
15	768
16	742
17	712
18	673
19	655
20	628
21	602
22	578
23	557
24	550
25	543
26	548
27	542
28	533
29	533
30	526
31	515
Total	28,710
Mean	926
Max	2070
Min	515
Ac-ft	56,950

Day	Aug
2023
1	505
2	527
3	522
4	523
5	534
6	535
7	567
8	717
9	700
10	633
11	596
12	571
13	542
14	530
15	517
16	503
17	492
18	482
19	461
20	470
21	501
22	824
23	917
24	755
25	669
26	657
27	672
28	652
29	632
30	603
31	604
Total	18,410
Mean	594
Max	917
Min	461
Ac-ft	36,520

Day	Sep
2023
1	595
2	584
3	583
4	589
5	609
6	578
7	560
8	546
9	541
10	545
11	538
12	527
13	523
14	512
15	506
16	503
17	496
18	500
19	508
20	522
21	613
22	684
23	648
24	634
25	628
26	623
27	642
28	666
29	653
30	680
--
Total	17,340
Mean	578
Max	684
Min	496
Ac-ft	34,380

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2023, BY WATER YEAR (WY)
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
Mean	847	1,179	1,802	2,107	3,065	4,391	6,365	7,329	5,624	2,041	786	721
Max	2,559	3,766	7,211	6,280	14,390	12,640	14,929	13,819	11,610	4,951	1,385	1,291
(WY)	(1960)	(1996)	(1996)	(1974)	(1996)	(2017)	(2019)	(1948)	(1974)	(1975)	(1984)	(1984)
Min	528	618	673	702	769	888	2,257	2,368	1,501	520	407	409
(WY)	(1988)	(1988)	(2003)	(1979)	(1977)	(1977)	(1968)	(1977)	(1992)	(1977)	(2015)	(2001)

SUMMARY STATISTICS
	Water Year 2023		Water Years 1945 - 2023
Annual total	908,100
Annual mean	2,488		3,016
Highest annual mean			5,253	1996
Lowest annual mean			1,136	1977
Highest daily mean	14,100	May 04	42,200	Feb 09, 1996
Lowest daily mean	461.0	Aug 19	344.0	Aug 20, 1977
Annual 7-day minimum	489.4	Aug 15	360.7	Aug 18, 1977
Maximum peak flow	14,500	May 04	51,800	Feb 09, 1996
Maximum peak stage	8.82	May 04	23.20	Dec 15, 1946
Annual runoff (cfsm)	0.760		0.921
Annual runoff (inches)	10.3		12.5
10 percent exceeds	7,094		7,370
50 percent exceeds	1,050		1,560
90 percent exceeds	554.2		652.0

USGS Water-data graph for site USGS 13333000