MISSOURI RIVER MAIN STEM

06185500 MISSOURI RIVER NEAR CULBERTSON, MT

(National stream quality accounting network station)

LOCATION.--Lat 48×07'30", long 104×28'20" (NAD 27), in SE14NW14 sec.3, T.27 N., R.56 E., Richland County, Hydrologic Unit 10060005, on right bank at upstream side of bridge on State Highway 16, 2.5 mi southeast of Culbertson, 10 mi downstream from Big Muddy Creek, and at river mile 1,620.76.

DRAINAGE AREA.--91,557 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--July 1941 to December 1951, April 1958 to current year.

REVISED RECORDS.--WSP 1729: Drainage area.

GAGE.--Water-stage recorder. Elevation of gage is 1,883.4 ft (NGVD 29) (U.S. Army Corps of Engineers bench mark). July 1 to Nov. 6, 1941, water-stage recorder at site 400 ft upstream at elevation 0.11 ft higher. Nov. 7, 1941, to Aug. 17, 1950, water-stage recorder at site 580 ft downstream at present elevation. Aug. 18, 1950, to Dec. 31, 1951, nonrecording gage on bridge at present elevation. Apr. 1, 1958, to Nov. 1, 1967, water-stage recorder at site 580 ft downstream at present elevation.

REMARKS.--Records good except for estimated daily discharges, which are poor. Flow partly regulated by Fort Peck Lake (station number 06131500) and many other reservoirs upstream from station. Diversions for irrigation of about 1,030,400 acres upstream from station. U.S. Army Corps of Engineers satellite telemeter at station.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

DAILY MEAN VALUES

DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP
1	4,720	4,910	e8,700	e8,600	e9,000	e9,200	11,200	11,200	12,700	6,110	7,680	6,860
2	4,630	4,830	e8,400	e8,900	e9,000	e8,000	10,500	11,100	11,400	6,220	7,770	6,980
3	4,600	4,840	e8,600	e9,100	e9,000	e7,900	10,200	11,200	10,300	6,220	8,010	7,000
4	4,600	4,830	e8,600	e9,200	e9,100	e7,400	9,590	11,100	9,450	6,890	8,210	7,000
5	4,580	e4,200	e8,300	e9,200	e9,100	e6,800	9,120	11,000	9,590	7,570	8,570	7,110
6	4,540	e3,500	e8,500	e8,900	e9,000	e6,600	8,570	11,100	9,280	7,780	7,730	7,340
7	4,500	e3,700	e8,700	e8,900	e9,300	e6,500	8,120	10,900	8,700	7,890	7,240	7,520
8	4,490	e4,300	e8,800	e8,800	e9,200	e6,700	7,690	11,000	8,210	8,070	7,350	7,320
9	4,460	e4,900	e8,700	e8,700	e9,500	e6,400	7,210	10,900	8,080	8,210	7,310	7,170
10	4,510	e4,900	e8,600	e8,800	e9,600	e6,700	6,860	10,800	7,940	7,980	7,220	7,150
11	4,550	e4,800	e8,600	e9,000	e9,500	e6,700	6,650	11,300	8,000	7,790	7,130	7,140
12	4,500	e4,900	e8,600	e9,100	e9,300	e6,500	6,390	11,400	7,950	7,830	7,010	7,120
13	4,470	e4,900	e8,800	e9,000	e9,100	e6,500	6,450	11,600	8,000	7,710	6,850	6,740
14	4,500	e4,900	e9,300	e9,000	e8,900	e6,400	6,430	11,700	8,200	7,720	7,050	6,890
15	4,520	e4,800	e8,700	e9,200	e9,100	e6,000	6,270	11,600	9,300	7,500	7,160	7,000
16	4,520	e4,800	e8,600	e9,200	e9,100	e6,000	7,020	11,400	10,200	7,530	6,950	7,120
17	4,610	e4,800	e8,600	e8,800	e8,900	e5,900	7,190	11,400	9,970	7,660	6,960	7,010
18	4,820	e4,800	e8,500	e9,000	e8,900	e7,100	6,790	11,300	8,820	7,540	6,870	6,980
19	4,760	e4,800	e8,600	e9,200	e9,000	e7,900	6,680	11,500	8,160	7,430	6,740	6,900
20	4,620	e4,800	e8,500	e9,400	e8,900	e8,500	6,600	11,700	7,800	7,290	6,840	e6,800
21	4,590	e5,000	e8,500	e9,600	e8,600	e9,800	6,460	11,800	7,570	7,380	e7,000	e6,500
22	4,580	e4,800	e8,600	e9,300	e8,500	e11,000	6,560	11,400	7,190	7,290	e6,900	e6,100
23	4,600	e4,800	e8,600	e9,300	e8,700	e11,000	7,020	11,700	7,010	6,930	e7,000	e5,600
24	4,580	e4,600	e8,600	e9,300	e9,100	e12,000	7,250	12,100	6,800	6,870	6,690	5,390
25	4,610	e5,000	e8,700	e9,100	e9,800	e13,000	7,220	12,900	6,520	7,020	6,620	5,010
26	4,610	e6,700	e8,400	e9,300	e9,500	e14,000	7,110	13,500	6,380	7,070	6,650	4,800
27	4,630	e7,200	e8,200	e9,000	e9,300	e14,000	8,230	14,000	6,230	6,930	6,680	4,950
28	4,660	e8,100	e8,000	e9,100	e9,400	e13,000	9,120	14,700	6,170	6,850	6,850	5,070
29	4,760	e8,900	e8,300	e9,200	e9,400	12,200	10,800	15,700	6,200	6,930	6,860	4,970
30	4,850	e9,200	e8,700	e9,000	---	12,100	11,600	15,500	6,170	7,180	6,890	4,880
31	4,960	---	e8,300	e9,000	---	11,700	---	13,100	---	7,450	6,870	---
TOTAL	142,930	157,510	265,600	281,200	264,800	273,500	236,900	371,600	248,290	226,840	221,660	194,420
MEAN	4,611	5,250	8,568	9,071	9,131	8,823	7,897	11,990	8,276	7,317	7,150	6,481
MAX	4,960	9,200	9,300	9,600	9,800	14,000	11,600	15,700	12,700	8,210	8,570	7,520
MIN	4,460	3,500	8,000	8,600	8,500	5,900	6,270	10,800	6,170	6,110	6,620	4,800
AC-FT	283,500	312,400	526,800	557,800	525,200	542,500	469,900	737,100	492,500	449,900	439,700	385,600
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941- 2004, BY WATER YEAR (WY)*
MEAN	10,490	9,127	9,149	9,902	10,490	10,290	10,450	9,599	9,698	10,150	11,220	10,950
MAX	28,570	22,440	13,280	14,400	17,450	20,690	32,840	26,650	26,650	37,050	25,300	20,590
(WY)	(1949)	(1952)	(1944)	(1986)	(1976)	(1976)	(1979)	(1975)	(1975)	(1975)	(1948)	(1948)
MIN	1,237	1,126	1,061	1,010	1,167	2,674	1,965	1,366	1,366	1,273	3,823	3,771
(WY)	(1942)	(1942)	(1942)	(1943)	(1942)	(1950)	(1945)	(1945)	(1945)	(1945	(1963)	(1992)

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR	FOR 2004 WATER YEAR	WATER YEARS 1941 - 2004*
ANNUAL TOTAL	2,896,580	2,885,250
ANNUAL MEAN	7,936	7,883	10,130
HIGHEST ANNUAL MEAN			19,910 1952
LOWEST ANNUAL MEAN			4,083 1942
HIGHEST DAILY MEAN	12,000 May 15	15,700 May 29	69,200 Mar 27, 1943
LOWEST DAILY MEAN	3,500 Nov  6	3,500 Nov  6	575 Nov 22, 1941
ANNUAL SEVEN-DAY MINIMUM	4,310 Nov  2	4,310 Nov  2	709 Nov 19, 1941
MAXIMUM PEAK FLOW		16,000 May 29	a78,200 Mar 26, 1943
MAXIMUM PEAK STAGE		7.65 May 29	b19.66 Apr 14, 1979
INSTANTANEOUS LOW FLOW		3,500 Nov  6	575 Nov 22, 1941
ANNUAL RUNOFF (AC-FT)	5,745,000	5,723,000	7,337,000
10 PERCENT EXCEEDS	10,300	11,100	15,800
50 PERCENT EXCEEDS	8,200	7,750	9,330
90 PERCENT EXCEEDS	4,740	4,800	4,500

SUMMARY STATISTICS	WATER YEARS 1941 - 1951**	WATER YEARS 1958 - 2004***
ANNUAL MEAN	9,245	10,280
HIGHEST ANNUAL MEAN	14,520 1948	16,580 1975
LOWEST ANNUAL MEAN	4,083 1942	6,121 1963
HIGHEST DAILY MEAN	69,200 Mar 27, 1943	52,000 Apr 18, 1979
LOWEST DAILY MEAN	575 Nov 22, 1941	2,000 Nov 20, 1964
ANNUAL SEVEN-DAY MINIMUM	709 Nov 19, 1941	2,130 Nov 19, 1964
MAXIMUM PEAK FLOW	a78,200 Mar 26, 1943	c55,000 Mar 23, 1960
MAXIMUM PEAK STAGE	b15.12 Mar 26, 1943	b19.66 Apr 14, 1979
ANNUAL RUNOFF (AC-FT)	6,698,000	7,444,000
10 PERCENT EXCEEDS	21,000	15,000
50 PERCENT EXCEEDS	6,190	9,510
90 PERCENT EXCEEDS	1,400	5,700
* During period of operation (1941-52, 1958 to current year) ** Before operational level at Fort Peck Lake was reached *** After operational level at Fort Peck Lake was reached a Gage height, 14.80 ft, from rating curve extended above 30,000 ft3/s b Backwater from ice c Gage height, 19.14 ft e Estimated

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