PLATTE RIVER BASIN

06759500 SOUTH PLATTE RIVER AT FORT MORGAN, CO

LOCATION.--Lat 40°16'07"(revised), long 103°47'56", in SW 14 NE 14 sec.31, T.4 N., R.57 W., Morgan County, Hydrologic Unit 10190012, on right bank 0.1 mi downstream from bridge on State Highway 52, 0.3 mi north of Interstate Highway 76, and 0.7 mi north of Fort Morgan.

DRAINAGE AREA.--14,627 mi2 (revised).

PERIOD OF RECORD.--November 1943 to September 1958, December 2001 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06759500

REVISED RECORDS.--WSP 1730: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4,260 ft above NGVD of 1929, from topographic map. Prior to Dec. 7, 2001, at site 0.1 mi upstream at different datum.

REMARKS.--No estimated daily discharges. Records fair. Natural flow of stream affected by transmoutain and transbasin diversions, storage reservoirs, power developments, ground-water withdrawls, and return flow from irrigated areas. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data for Gaging Stations" section of this report.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum flood known, 84,300 ft3/s, May 31, 1935, by slope-area determination of peak flow 1 mi upstream; flood came principally from Bijou Creek.

Discharge, cubic feet per second 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAILY MEAN VALUES

DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP
1	75	851	186	215	266	274	531	232	860	148	149	600
2	126	601	172	216	268	265	560	369	1,920	192	135	1,720
3	156	350	156	219	256	256	569	581	2,380	249	108	471
4	159	214	146	218	249	240	544	487	1,980	229	119	373
5	234	185	140	217	248	241	531	339	1,540	210	167	337
6	326	295	139	216	245	244	490	263	1,520	172	163	313
7	259	258	139	215	236	263	399	84	1,310	134	137	334
8	202	163	135	217	244	260	335	64	905	131	173	345
9	177	160	131	219	281	257	303	96	1,040	141	174	352
10	180	141	129	201	263	255	288	218	801	121	171	370
11	213	131	128	195	248	255	286	617	571	107	191	369
12	212	144	124	207	251	287	261	1,850	574	103	207	347
13	222	150	119	219	267	292	255	1,300	704	106	208	308
14	239	139	121	222	270	304	236	910	777	138	206	271
15	252	134	120	224	274	296	191	789	708	161	202	271
16	266	127	118	197	283	301	195	827	740	146	207	288
17	294	125	120	218	266	287	193	754	742	134	201	293
18	311	127	119	218	270	279	247	909	828	129	191	269
19	344	132	117	219	286	253	322	713	897	122	196	286
20	365	180	107	216	286	329	311	725	972	117	215	265
21	376	173	119	214	276	482	337	804	980	150	199	242
22	514	171	120	217	282	356	366	768	781	150	207	238
23	565	170	113	246	254	454	353	479	611	186	176	213
24	534	173	110	255	235	740	418	333	540	210	164	165
25	510	179	105	260	270	843	989	264	601	209	148	127
26	499	173	126	259	316	897	1,440	216	579	199	128	111
27	525	182	219	262	355	664	874	209	490	233	123	111
28	543	192	218	263	296	578	379	199	286	196	122	100
29	661	196	163	259	---	571	290	211	140	170	127	100
30	723	193	129	257	---	502	235	319	144	200	139	105
31	770	---	174	259	---	462	---	565	---	181	161	---
TOTAL	10,832	6,409	4,262	7,039	7,541	11,987	12,728	16,494	26,921	5,074	5,214	9,694
MEAN	349	214	137	227	269	387	424	532	897	164	168	323
MAX	770	851	219	263	355	897	1,440	1,850	2,380	249	215	1,720
MIN	75	125	105	195	235	240	191	64	140	103	108	100
AC-FT	21,490	12,710	8,450	13,960	14,960	23,780	25,250	32,720	53,400	10,060	10,340	19,230
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1944 - 2003, BY WATER YEAR (WY)
MEAN	226	233	275	339	320	370	369	968	1,302	329	292	212
MAX	527	521	770	686	829	1,319	969	5,082	7,615	1,351	874	362
(WY)	(1948)	(1946)	(1958)	(1946)	(1948)	(1948)	(1958)	(1958)	(1949)	(1947)	(1951)	(1957)
MIN	91.3	136	124	183	160	166	150	110	108	129	82.5	71.8
(WY)	(1951)	(1955)	(1951)	(1956)	(1956)	(1957)	(2002)	(1954)	(2002)	(1954)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1944 - 2003
ANNUAL TOTAL	72,641	124,195
ANNUAL MEAN	199	340	451
HIGHEST ANNUAL MEAN			956 1958
LOWEST ANNUAL MEAN			151 1954
HIGHEST DAILY MEAN	851 Nov 1	2,380 Jun 3	16,600 Jun 16, 1949
LOWEST DAILY MEAN	35 Jun 19	64 May 8	25 Oct 7, 1956
ANNUAL SEVEN-DAY MINIMUM	47 Jun 18	113 Dec 19	28 Oct 4, 1956
MAXIMUM PEAK FLOW		2,520 Jun 3	a33,800 Aug 3, 1951
MAXIMUM PEAK STAGE		12.47 Jun 3	b12.90 Aug 3, 1951
ANNUAL RUNOFF (AC-FT)	144,100	246,300	326,500
10 PERCENT EXCEEDS	452	731	740
50 PERCENT EXCEEDS	143	244	220
90 PERCENT EXCEEDS	58	127	118

a From rating curve extended above 15,000 ft3/s. b Site and datum then in use.