PLATTE RIVER BASIN

06701500 SOUTH PLATTE RIVER BELOW CHEESMAN LAKE, CO

LOCATION.--Lat 39°12'33", long 105°16'02", in SE 14 NW 14 sec.6, T.10 S., R.70 W., Jefferson County, Hydrologic Unit 10190002, on left bank 1,400 ft downstream from toe of Cheesman Dam, and 3.8 mi southwest of Deckers.

DRAINAGE AREA.--1,752 mi2.

PERIOD OF RECORD.--October 1924 to September 1998, October 2001 to current year. Monthly discharge only for some periods, published in WSP 1310. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06701500

REVISED RECORDS.--WSP 1310: 1949. WSP 1730: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry, and Parshall flume. Datum of gage is 6,609.29 ft above NGVD of 1929. Prior to May 14, 1956, at site 370 ft upstream at datum 0.50 ft higher.

REMARKS.--No estimated daily discharges. Records good. Natural flow of stream affected by minor transmountain diversion from Colorado River basin through Boreas Pass ditch, Antero and Elevenmile Canyon Reservoirs, diversions for irrigation of about 40,000 acres, and return flow from irrigated areas. Flow completely regulated by Cheesman Lake (station 06701000).

COOPERATION.--Records collected and computed by Colorado Division of Water Resources and reviewed by Geological Survey.

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	297	150	81	115	97	57	50	28	87	45	63	127
2	295	118	83	115	98	57	46	26	70	45	63	227
3	254	68	83	115	99	57	44	26	38	45	63	252
4	188	51	93	115	98	57	44	25	38	45	63	249
5	159	52	99	115	98	80	44	25	38	45	63	293
6	160	53	99	115	98	98	44	25	38	45	63	406
7	160	103	99	115	98	98	44	33	38	45	77	537
8	160	140	100	115	98	98	44	38	38	45	98	568
9	160	128	110	115	98	98	70	39	38	45	98	529
10	179	128	120	115	98	98	104	38	38	45	98	497
11	189	97	120	115	98	98	104	38	38	46	125	493
12	189	78	119	115	97	98	104	37	38	47	147	493
13	189	78	119	115	98	98	74	37	38	47	148	492
14	167	78	119	115	98	84	43	38	38	56	148	490
15	149	79	119	103	98	71	35	36	38	71	148	490
16	150	79	119	91	98	71	35	28	39	71	148	487
17	165	79	119	91	98	71	35	23	39	71	148	487
18	183	79	119	91	98	71	35	23	41	71	148	426
19	183	79	106	91	98	71	36	24	44	72	122	335
20	182	79	94	91	98	61	36	22	44	72	103	335
21	182	81	94	92	98	44	36	23	44	71	103	355
22	181	81	94	92	98	44	36	29	44	71	103	443
23	181	81	124	92	98	44	36	36	44	92	101	500
24	181	81	146	92	98	59	37	36	44	118	126	417
25	166	81	146	65	98	71	34	35	44	124	148	363
26	150	81	146	44	98	72	31	35	44	90	148	363
27	150	81	131	41	98	73	31	35	44	76	175	361
28	150	81	117	41	73	59	31	35	44	71	219	360
29	150	81	118	41	---	50	31	35	44	62	184	329
30	150	81	116	41	---	50	31	36	44	62	172	270
31	150	---	115	70	---	50	---	56	---	63	129	---
TOTAL	5,549	2,606	3,467	2,879	2,718	2,208	1,405	1,000	1,298	1,974	3,742	11,974
MEAN	179	86.9	112	92.9	97.1	71.2	46.8	32.3	43.3	63.7	121	399
MAX	297	150	146	115	99	98	104	56	87	124	219	568
MIN	149	51	81	41	73	44	31	22	38	45	63	127
AC-FT	11,010	5,170	6,880	5,710	5,390	4,380	2,790	1,980	2,570	3,920	7,420	23,750
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1925 - 2003, BY WATER YEAR (WY)
MEAN	131	68.7	52.7	57.4	55.6	56.4	146	279	330	356	341	207
MAX	380	266	184	156	169	208	932	1,716	1,088	1,451	984	517
(WY)	(1985)	(1985)	(1996)	(1998)	(1998)	(1986)	(1942)	(1970)	(1995)	(1995)	(1984)	(1998)
MIN	12.9	6.33	5.26	5.26	2.76	3.11	2.00	11.0	38.5	53.5	66.7	33.5
(WY)	(1965)	(1960)	(1926)	(1926)	(1957)	(1957)	(1957)	(1938)	(1989)	(1967)	(1978)	(1978)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1925 - 2003
ANNUAL TOTAL	67,390	40,820
ANNUAL MEAN	185	112	174
HIGHEST ANNUAL MEAN			450 1970
LOWEST ANNUAL MEAN			60.1 1978
HIGHEST DAILY MEAN	461 Aug 28	568 Sep 8	4,580 Apr 29, 1970
LOWEST DAILY MEAN	39 Jun 29	22 May 20	a1.6 Apr 8, 1957
ANNUAL SEVEN-DAY MINIMUM	51 Mar 5	25 May 16	1.6 Apr 8, 1957
MAXIMUM PEAK FLOW		571 Sep 7	4,640 Apr 29, 1970
MAXIMUM PEAK STAGE		2.81 Sep 7	13.40 Apr 29, 1970
ANNUAL RUNOFF (AC-FT)	133,700	80,970	126,200
10 PERCENT EXCEEDS	346	188	427
50 PERCENT EXCEEDS	154	91	97
90 PERCENT EXCEEDS	56	36	19

a Also occurred Apr 9-14, 1957.