ARKANSAS RIVER BASIN

07091200 ARKANSAS RIVER NEAR NATHROP, CO

LOCATION.--Lat 38°39'08", long 106°03'02", in SE14SW14 sec.23, T.51 N., R.8 E., Chaffee County, Hydrologic Unit 11020001, on right bank 300 ft upstream from end of Chaffee County Road 194 in Browns Canyon, 3.7 mi downstream from Browns Creek, 6.7 mi south of Nathrop, and 9 mi north of Salida.

DRAINAGE AREA.--1,060 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1964 to September 1982. April 1989 to September 1993. October 1993 to current year (seasonal records only). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07091200

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 7,350 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by storage reservoirs, power developments, transbasin and transmountain diversions, diversions for irrigation and municipal use, ground-water withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge (occurred during period of seasonal record), 5,540 ft3/s, July 14, 1995, gage height, 8.63 ft, from rating curve extended above 5,500 ft3/s; maximum gage height, 8.94 ft, Aug. 31, 1972 (backwater from unnamed tributary); minimum daily, 95 ft3/s, Feb. 25-27, 1977.

EXTREMES FOR CURRENT YEAR (seasonal only).--Maximum discharge, 3,310 ft3/s, June 2, gage height, 7.35 ft; minimum daily, 179 ft3/s, Apr. 1.

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	---	---	---	---	---	---	179	286	3,140	923	674	327
2	---	---	---	---	---	---	203	298	3,070	899	657	330
3	---	---	---	---	---	---	253	301	2,800	846	642	317
4	---	---	---	---	---	---	245	293	2,350	820	642	326
5	---	---	---	---	---	---	230	295	2,060	796	543	311
6	---	---	---	---	---	---	229	300	1,800	760	576	323
7	---	---	---	---	---	---	225	286	1,430	746	614	361
8	---	---	---	---	---	---	233	287	1,200	775	530	411
9	---	---	---	---	---	---	236	291	1,180	762	619	380
10	---	---	---	---	---	---	242	288	1,490	743	665	471
11	---	---	---	---	---	---	270	287	1,630	741	644	496
12	---	---	---	---	---	---	278	282	1,770	706	551	474
13	---	---	---	---	---	---	275	287	1,900	719	438	468
14	---	---	---	---	---	---	287	308	1,860	737	e375	451
15	---	---	---	---	---	---	297	361	1,790	710	e300	438
16	---	---	---	---	---	---	256	421	1,890	710	e275	348
17	---	---	---	---	---	---	256	431	1,720	715	e300	327
18	---	---	---	---	---	---	257	549	1,560	727	306	370
19	---	---	---	---	---	---	254	836	1,400	718	335	380
20	---	---	---	---	---	---	252	821	1,640	715	318	374
21	---	---	---	---	---	---	249	675	1,590	724	302	370
22	---	---	---	---	---	---	293	731	1,550	711	300	375
23	---	---	---	---	---	---	307	953	1,550	691	306	e337
24	---	---	---	---	---	---	289	1,230	1,260	709	334	e307
25	---	---	---	---	---	---	301	1,490	1,020	709	353	e286
26	---	---	---	---	---	---	309	1,430	951	739	380	e271
27	---	---	---	---	---	---	312	1,810	884	779	374	e259
28	---	---	---	---	---	---	314	2,210	866	819	367	e253
29	---	---	---	---	---	---	320	2,510	862	668	354	e249
30	---	---	---	---	---	---	288	2,940	866	663	370	e247
31	---	---	---	---	---	---	---	3,070	---	666	352	---
TOTAL	---	---	---	---	---	---	7,939	26,557	49,079	23,146	13,796	10,637
MEAN	---	---	---	---	---	---	265	857	1,636	747	445	355
MAX	---	---	---	---	---	---	320	3,070	3,140	923	674	496
MIN	---	---	---	---	---	---	179	282	862	663	275	247
AC-FT	---	---	---	---	---	---	15,750	52,680	97,350	45,910	27,360	21,100

e Estimated.