RED RIVER OF THE NORTH BASIN

05099600 PEMBINA RIVER AT WALHALLA, ND

LOCATION.--Lat 48×54'48", long 97×55'00", in SW14NE14NE14 sec.29, T.163 N., R.56 W., Pembina County, Hydrologic Unit 09020313, on southeast corner of State Highway 32 bridge, 0.5 mi south of Walhalla, and 7 mi downstream from Little South Pembina River.

DRAINAGE AREA.--3,350 mi2, approximately.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1939 to September 1990, April 2000 to current year. Water years 1991-94 and 1997, miscellaneous discharge measurements only. Prior to October 1963, published as "near Walhalla".

REVISED RECORDS.--WSP 1388: 1943, 1950(P). WSP 1558: 1957. WSP 1728: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 933.34 ft above National Geodetic Vertical Datum of 1929. Prior to Nov. 10, 1943, nonrecording gage and Nov. 10, 1943, to Sept. 30, 1963, water stage recorder at site 5.5 mi upstream at different datum.

REMARKS.--Records fair except for estimated daily discharges, which are poor.

EXTREMES OUTSIDE PERIOD OF RECORD.--A peak gage height of 16.53 ft (from floodmark), discharge not determined, occurred on Apr. 25 or 26, 1997. A measured discharge of 22,500 ft3/s, gage height, 16.20 ft, occurred on Apr. 26, 1997.

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	14	e14	e10	e7.4	e6.3	e8.0	5,890	e1,140	e2,000	465	177	160
2	16	e13	e10	e7.3	e6.3	e8.0	5,190	1,070	1,730	462	171	155
3	18	e12	e10	e7.2	e6.4	e8.2	4,300	1,000	1,490	474	162	151
4	17	e11	e10	e7.1	e6.5	e8.3	3,700	977	1,220	547	155	159
5	17	e11	e10	e7.0	e6.5	e8.5	3,480	932	1,040	498	148	217
6	15	e10	e10	e6.8	e6.6	e8.6	3,360	911	914	481	267	185
7	13	e10	e10	e6.6	e6.7	e8.7	3,950	860	2,060	434	417	171
8	12	e10	e10	e6.4	e6.6	e8.8	4,340	828	2,320	411	279	162
9	9.5	e11	e9.9	e6.2	e6.7	e9.0	3,060	878	1,620	444	323	156
10	8.4	e11	e9.9	e6.1	e6.9	e9.0	2,630	879	1,260	460	288	152
11	8.5	e11	e9.9	e6.0	e7.0	e9.3	2,380	898	1,080	472	276	149
12	8.6	e11	e9.8	e6.0	e7.2	e9.6	2,530	959	980	436	262	146
13	8.5	e11	e9.7	e5.9	e7.4	e10	2,210	914	901	397	240	149
14	8.4	e10	e9.5	e6.0	e7.5	e11	2,140	1,020	e880	374	218	153
15	10	e10	e9.4	e6.1	e7.9	e11	2,010	1,250	846	360	199	150
16	13	e10	e9.1	e6.0	e8.1	e11	1,940	1,890	821	338	190	147
17	8.4	e10	e9.2	e6.0	e8.2	e12	1,850	1,690	774	320	182	147
18	8.1	e10	e9.0	e6.0	e8.4	e12	1,810	1,520	735	307	192	141
19	8.3	e11	e9.0	e6.2	e8.7	e12	1,790	1,400	689	294	185	137
20	8.2	e10	e8.9	e6.3	e8.7	e13	e1,700	1,360	665	282	175	212
21	14	e10	e8.7	e6.2	e8.6	e13	e1,630	1,310	640	270	171	344
22	13	e11	e8.5	e6.2	e8.5	e14	e1,600	1,210	616	267	173	215
23	12	e11	e8.3	e6.2	e8.4	e14	e1,500	e1,050	609	258	165	198
24	12	e11	e8.1	e6.1	e8.3	e15	e1,440	e1,000	583	245	233	396
25	12	e11	e8.2	e6.1	e8.2	e20	e1,400	e930	562	235	209	300
26	12	e10	e8.0	e6.1	e8.1	e45	e1,320	e1,000	562	223	220	238
27	14	e11	e8.2	e6.0	e8.1	e200	e1,250	e940	563	211	192	208
28	17	e11	e7.9	e6.2	e8.1	e2,500	e1,230	e880	538	208	180	189
29	16	e12	e7.7	e6.3	e8.1	e4,500	e1,210	e850	513	194	176	180
30	16	e11	e7.6	e6.3	---	4,230	e1,150	e1,090	491	188	176	176
31	15	---	e7.5	e6.2	---	5,370	---	e2,370	---	183	168	---
TOTAL	382.9	326	282.0	196.5	219.0	17,117.0	73,990	35,006	29,702	10,738	6,569	5,643
MEAN	12.4	10.9	9.10	6.34	7.55	552	2,466	1,129	990	346	212	188
MAX	18	14	10	7.4	8.7	5,370	5,890	2,370	2,320	547	417	396
MIN	8.1	10	7.5	5.9	6.3	8.0	1,150	828	491	183	148	137
AC-FT	759	647	559	390	434	33,950	146,800	69,430	58,910	21,300	13,030	11,190
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2004, BY WATER YEAR (WY)
MEAN	64.3	43.2	21.1	12.1	9.23	129	1,086	778	359	171	117	78.0
MAX	600	454	216	120	68.9	1,206	4,950	4,672	1,933	814	960	432
(WY)	(1995)	(1995)	(1995)	(1995)	(1995)	(1995)	(1995)	(1974)	(1974)	(1970)	(1995)	(1944)
MIN	0.04	0.15	0.00	0.00	0.00	0.00	49.6	18.8	2.83	0.74	0.10	0.00
(WY)	(1940)	(1941)	(1941)	(1940)	(1940)	(1940)	(1977)	(1940)	(1940)	(1940)	(1961)	(1940)

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR	FOR 2004 WATER YEAR	WATER YEARS 1940 - 2004
ANNUAL TOTAL	25,756.7	180,171.4
ANNUAL MEAN	70.6	492	241
HIGHEST ANNUAL MEAN			1,146 1995
LOWEST ANNUAL MEAN			9.77 1940
HIGHEST DAILY MEAN	620 May 19	5,890 Apr  1	13,800 Apr 18, 1950
LOWEST DAILY MEAN	2.9 Mar  9	5.9 Jan 13	0.00 Oct 14, 1939
ANNUAL SEVEN-DAY MINIMUM	3.0 Mar  7	6.0 Jan 11	0.00 Oct 14, 1939
MAXIMUM PEAK FLOW		a6,770 Apr  1	b20,400 Apr 18, 1950
MAXIMUM PEAK STAGE		c13.55 Mar 28	d16.20 Apr 18, 1950
ANNUAL RUNOFF (AC-FT)	51,090	357,400	174,600
10 PERCENT EXCEEDS	235	1,490	580
50 PERCENT EXCEEDS	20	148	38
90 PERCENT EXCEEDS	4.6	7.0	2.0

a Gage height, 12.32 ft b From rating curve extended above 7,000 ft3/s on basis of contracted-opening measurement of discharge c Backwater from ice d Approximate stage, from rating curve, at present location and datum; stage at site and datum then in use, 19.2 ft e Estimated

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