LITTLE MISSOURI RIVER BASIN

06335500 LITTLE MISSOURI RIVER AT MARMARTH, ND

LOCATION.--Lat 46×17'52", long 103×55'03", in SW14 sec.30, T.133 N., R.105 W., Slope County, Hydrologic Unit 10110203, on left bank 90 ft downstream from bridge on U.S. Highway 12 in Marmarth and 1.5 mi downstream from Little Beaver Creek.

DRAINAGE AREA.--4,640 mi2, approximately.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--March 1938 to current year.

REVISED RECORDS (WATER YEARS).--WSP 896: 1938-39. WSP 1086: 1943-44. WSP 1279: 1943(M), 1945-46, 1948. WSP 1439: 1950 (calendar year figures).

GAGE.--Water-stage recorder. Datum of gage is 2,686.32 ft above National Geodetic Vertical Datum of 1929. Prior to June 23, 1950, various nonrecording gages on former highway bridge at present site and datum. June 23, 1950, to Sept. 2, 1957, nonrecording gage at site 90 ft upstream at present datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. Small diversions for irrigation upstream from station.

EXTREMES OUTSIDE PERIOD OF RECORD.--According to local residents, the greatest known flood prior to 1953 occurred in June 1907 (stage unknown). Other major floods reached stages of about 21.5 ft in March 1913, 19.7 ft in March 1920, and 20.2 ft in May 1929. These stages are not comparable to stages during period of record, owing to construction of levees.

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	13	e16	e15	e8.9	e2.2	e369	75	22	68	6.1	6.9	13
2	13	e18	e16	e8.2	e2.2	e625	65	22	60	7.6	5.4	11
3	11	e18	e16	e7.7	e2.2	e461	59	20	e50	58	7.5	16
4	11	e18	e15	e6.6	e2.2	e383	54	18	e40	67	671	18
5	11	e18	e15	e5.7	e2.2	e336	50	17	e45	134	934	17
6	10	e20	e15	e3.9	e2.2	e461	46	17	e50	63	1,080	22
7	10	e20	e14	e3.0	e2.2	e565	43	18	e45	61	826	15
8	9.5	e21	e14	e2.6	e2.2	e825	39	18	e30	88	781	13
9	9.4	e21	e13	e2.5	e2.1	e2,120	36	16	e20	56	1,270	13
10	8.6	e22	e13	e2.5	e2.1	e2,700	35	14	18	36	533	12
11	8.2	e23	e13	e2.7	e2.1	e1,140	33	8.6	25	27	276	11
12	7.8	e24	e13	e2.9	e2.0	e900	32	9.2	32	290	163	10
13	7.7	e26	e13	e3.0	e2.0	e1,450	32	12	26	244	117	19
14	8.1	e28	e13	e3.1	e1.9	e950	29	12	20	148	92	32
15	8.3	e29	e13	e3.0	e1.9	679	29	13	18	101	74	83
16	8.9	e30	e13	e3.0	e2.2	565	28	14	16	73	61	171
17	10	e32	e13	e3.1	e2.8	455	34	14	15	56	51	99
18	12	e33	e13	e3.0	e3.8	412	35	17	14	43	42	46
19	11	e35	e13	e3.0	e4.8	376	37	19	12	34	36	30
20	11	e30	e13	e3.0	e7.1	318	37	21	13	27	32	25
21	11	e24	e13	e2.9	e13	225	34	23	9.1	23	28	22
22	11	e19	e13	e2.8	e58	174	31	60	7.8	22	25	21
23	9.3	e15	e13	e2.7	e107	148	30	51	7.7	17	24	19
24	8.1	e14	e13	e2.6	e299	133	26	76	9.4	16	45	18
25	9.3	e14	e12	e2.6	e349	120	24	88	9.0	14	22	16
26	9.7	e14	e12	e2.5	e394	110	23	68	9.1	12	19	15
27	11	e14	e12	e2.5	e364	677	23	45	7.9	11	20	14
28	12	e14	e11	e2.4	e484	376	23	33	6.9	8.6	19	13
29	e12	e14	e11	e2.3	e428	187	22	184	6.1	8.6	19	13
30	e13	e15	e10	e2.3	---	113	20	134	5.6	11	17	12
31	e15	---	e9.3	e2.3	---	86	---	89	---	9.0	14	---
TOTAL	320.9	639	405.3	109.3	2,548.4	18,439	1,084	1,172.8	695.6	1,771.9	7,310.8	839
MEAN	10.4	21.3	13.1	3.53	87.9	595	36.1	37.8	23.2	57.2	236	28.0
MAX	15	35	16	8.9	484	2,700	75	184	68	290	1,270	171
MIN	7.7	14	9.3	2.3	1.9	86	20	8.6	5.6	6.1	5.4	10
AC-FT	637	1,270	804	217	5,050	36,570	2,150	2,330	1,380	3,510	14,500	1,660
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 2004, BY WATER YEAR (WY)
MEAN	106	38.3	17.0	17.2	189	918	755	572	640	219	82.7	69.3
MAX	1,489	250	107	260	2,208	5,079	6,691	3,840	4,705	1,917	400	526
(WY)	(1972)	(1999)	(1952)	(1973)	(1943)	(1978)	(1952)	(1975)	(1944)	(1993)	(1993)	(1941)
MIN	0.87	0.37	0.00	0.00	0.00	22.1	10.7	4.75	3.51	0.10	0.16	0.00
(WY)	(1959)	(1956)	(1956)	(1939)	(1939)	(2002)	(1981)	(1980)	(1961)	(1980)	(1988)	(1955)

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR	FOR 2004 WATER YEAR	WATER YEARS 1938 - 2004
ANNUAL TOTAL	27,287.76	35,336.0
ANNUAL MEAN	74.8	96.5	303
HIGHEST ANNUAL MEAN			986 1944
LOWEST ANNUAL MEAN			20.5 1988
HIGHEST DAILY MEAN	2,000 Mar 19	2,700 Mar 10	28,600 Apr  5, 1944
LOWEST DAILY MEAN	0.00 Aug  7	1.9 Feb 14	0.00 Dec 18, 1938
ANNUAL SEVEN-DAY MINIMUM	0.00 Aug 24	2.0 Feb  9	0.00 Dec 18, 1938
MAXIMUM PEAK FLOW		a2,800 Mar 10	c45,000 Mar 23, 1947
MAXIMUM PEAK STAGE		b6.74 Mar 10	b23.40 Mar 31, 1952
ANNUAL RUNOFF (AC-FT)	54,130	70,090	219,900
10 PERCENT EXCEEDS	123	280	619
50 PERCENT EXCEEDS	14	18	32
90 PERCENT EXCEEDS	0.40	3.0	1.0

a About b Backwater from ice c Gage height, 21.7 ft e Estimated

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