EAGLE RIVER BASIN

394220106431500 EAGLE RIVER BELOW MILK CREEK NEAR WOLCOTT, CO

(Eagle River Watershed Retrospective Assessment Program)

WATER-QUALITY RECORDS

LOCATION.--Lat 39°42'20", long 106°43'15", in SW14NW14 sec. 17, T.4S, R.83W., Eagle County, Hydrologic Unit 14010003, at U.S. Highway 6, 0.75 mi downstream from Milk Creek, and 2.3 mi west of Wolcott.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--May to August 1976, October 1999 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=394220106431500

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Dis- solved oxygen, mg/L (00300)	pH, water, unfltrd field, std units (00400)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)	Hard- ness, water, unfltrd mg/L as CaCO3 (00900)	Calcium water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)	Potas- sium, water, fltrd, mg/L (00935)	Sodium adsorp- tion ratio (00931)	Sodium, water, fltrd, mg/L (00930)	Alka- linity, wat flt inc tit field, mg/L as CaCO3 (39086)
OCT
22...	1440	115	10.8	8.9	887	7.5	210	62.2	13.6	3.06	3	98.9	99
NOV
12...	1445	116	12.8	9.0	814	2.0	200	57.1	13.4	2.46	3	86.3	84
DEC
16...	1015	73	11.1	8.2	1,030	0.0	230	67.3	15.9	3.62	3	104	100
JAN
15...	1415	75	11.7	8.4	1,130	0.0	260	74.9	17.3	3.68	3	126	103
FEB
19...	1440	75	12.0	8.7	1,250	4.3	280	81.5	19.4	4.70	4	145	112
MAR
26...	1500	123	9.9	8.8	1,000	6.4	250	70.1	18.2	2.91	3	101	103
APR
15...	1450	315	9.3	8.3	374	6.1	120	33.7	8.59	1.42	1	25.8	65
MAY
20...	1710	1,610	8.6	8.2	186	9.8	77	22.0	5.46	0.90	0.3	6.28	54
JUN
05...	0930	3,100	9.3	8.0	138	6.9	59	17.1	3.94	0.699	0.2	4.01	46
JUL
23...	1400	294	8.0	8.9	467	18.1	140	40.0	8.92	1.62	1	40.3	75
AUG
12...	1515	177	7.4	8.7	724	21.6	190	55.8	13.4	2.78	2	72.8	98
SEP
09...	1610	292	7.9	8.3	478	14.3	150	42.0	10.7	1.91	1	36.2	83

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Bicar- bonate, wat flt incrm. titr., field, mg/L (00453)	Carbon- ate, wat flt incrm. titr., field, mg/L (00452)	Chlor- ide, water, fltrd, mg/L (00940)	Fluor- ide, water, fltrd, mg/L (00950)	Silica, water, fltrd, mg/L (00955)	Sulfate water, fltrd, mg/L (00945)	Residue water, fltrd, sum of consti- tuents mg/L (70301)	Residue water, fltrd, tons/ acre-ft (70303)	Residue water, fltrd, tons/d (70302)	Ammonia + org-N, water, fltrd, mg/L as N (00623)	Ammonia + org-N, water, unfltrd mg/L as N (00625)	Ammonia water, fltrd, mg/L as N (00608)	Nitrite + nitrate water fltrd, mg/L as N (00631)
OCT
22...	99	11	152	<0.2	4.6	111	508	0.69	158	0.13	0.16	E.009	0.617
NOV
12...	93	5	137	<0.17	4.8	102	456	0.62	143	0.11	0.18	<0.015	0.621
DEC
16...	122	--	175	0.17	6.1	122	561	0.76	111	0.18	0.19	0.016	1.71
JAN
15...	120	3	199	0.18	5.9	135	634	0.86	128	0.18	0.34	0.021	2.15
FEB
19...	122	7	229	0.17	4.4	152	713	0.97	144	0.30	0.34	0.015	2.02
MAR
26...	106	10	157	0.16	4.5	130	551	0.75	183	0.24	0.61	0.025	1.25
APR
15...	79	--	43.1	0.09	6.23	45.5	207	0.28	176	0.22	0.66	0.021	0.676
MAY
20...	66	--	8.71	<0.2	6.3	18.5	102	0.14	442	0.17	0.46	E.010	0.306
JUN
05...	57	--	5.01	<0.2	5.28	11.9	76	0.10	639	0.11	0.21	<0.015	0.131
JUL
23...	80	6	61.5	<0.2	4.1	49.5	252	0.34	200	0.15	0.18	0.018	0.176
AUG
12...	120	--	110	<0.2	5.52	78.5	401	0.55	192	0.18	0.24	E.010	0.606
SEP
09...	101	--	59.4	<0.2	5.7	56.9	265	0.36	209	0.13	0.49	<0.015	0.522

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Nitrite water, fltrd, mg/L as N (00613)	Organic nitro- gen, water, fltrd, mg/L (00607)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, fltrd, mg/L (00666)	Phos- phorus, water, unfltrd mg/L (00665)	Organic carbon, water, fltrd, mg/L (00681)	E coli, m-TEC MF, water, col/ 100 mL (31633)	Fecal coli- form, M-FC 0.7u MF col/ 100 mL (31625)
OCT
22...	0.034	--	0.046	0.054	0.068	--	--	--
NOV
12...	0.036	--	0.042	0.051	0.072	1.8	<1	E1
DEC
16...	0.135	0.17	0.150	0.166	0.184	--	--	--
JAN
15...	0.092	0.15	0.216	0.22	0.26	--	--	--
FEB
19...	0.067	0.28	0.243	0.26	0.27	--	<1	<1
MAR
26...	0.036	0.21	0.140	0.159	0.30	--	--	--
APR
15...	0.015	0.20	0.035	0.044	0.24	4.2	23	30
MAY
20...	0.003	--	0.010	0.015	0.120	--	E3	E4
JUN
05...	0.003	--	<0.007	0.007	0.065	3.6	E7	--
JUL
23...	0.004	0.13	0.020	0.030	0.039	--	--	--
AUG
12...	0.010	--	0.061	0.079	0.096	1.6	E90	E10
SEP
09...	0.005	--	0.035	0.051	0.190	--	--	--
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Cadmium water, fltrd, ug/L (01025)	Chrom- ium, water, fltrd, ug/L (01030)	Copper, water, fltrd, ug/L (01040)	Iron, water, fltrd, ug/L (01046)	Iron, water, unfltrd recover -able, ug/L (01045)	Lead, water, fltrd, ug/L (01049)	Mangan- ese, water, fltrd, ug/L (01056)	Mangan- ese, water, unfltrd recover -able, ug/L (01055)	Mercury water, fltrd, ug/L (71890)	Nickel, water, fltrd, ug/L (01065)	Selen- ium, water, fltrd, ug/L (01145)	Silver, water, fltrd, ug/L (01075)	Zinc, water, fltrd, ug/L (01090)
NOV
12...	<0.2	--	E.9	42	150	<1	19.8	28.0	<0.02	--	<3	<0.3	<24
APR
15...	<0.2	<0.8	2.2	68	1,500	0.23	69.3	162	<0.02	1.77	E.3	<0.2	24
JUN
05...	<0.2	<0.8	1.3	33	1,110	0.12	12.8	79.6	<0.02	0.41	<0.5	<0.2	9
AUG
12...	<0.2	<0.8	1.4	38	320	0.27	19.4	47.2	<0.02	1.25	E.4	<0.2	9
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

SUSPENDED SEDIMENT DISCHARGE, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Temper- ature, water, deg C (00010)	Suspnd. sedi- ment, sieve diametr percent <.063mm (70331)	Sus- pended sedi- ment concen- tration mg/L (80154)	Sus- pended sedi- ment load, tons/d (80155)
NOV
12...	1445	116	2.0	--	5	1.6
FEB
19...	1440	75	4.3	--	7	1.5
APR
15...	1450	315	6.1	84	174	148
MAY
20...	1710	1,610	9.8	75	134	582
JUN
05...	0930	3,100	6.9	62	46	385
AUG
12...	1515	177	21.6	98	15	7.2