EAGLE RIVER BASIN

09067005 EAGLE RIVER AT AVON, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 39°37'54", long 106°31'19", in SE14NW14 sec.12, T.5 S., R.82 W., Eagle County, Hydrologic Unit 14010003, on left bank 100 ft downstream from bridge, 300 ft north of Highway 6 and 24, and 350 ft downstream from Beaver Creek, in the city of Avon.

DRAINAGE AREA.--395 mi2.

PERIOD OF RECORD.--October 1993 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09067005

REMARKS.--Records of discharge are given for Eagle River below wastewater treatment plant at Avon (station 09067020), located 0.6 mi downstream; flows are considered to be equivalent. Additional water-quality data were collected and are published in the "Eagle River Watershed Retrospective
Assessment Program" section of this report.

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

Date	Time	Instan- taneous dis- charge, cfs (00061)	Turbid- ity, wat unf lab, Hach 2100AN NTU (99872)	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)
OCT
22...	1210	67	--	9.8	8.1	293	4.0	140	38.3	10.6	1.08	0.2	6.02
NOV
14...	0850	92	--	10.7	7.8	262	0.5	120	33.0	9.75	0.90	0.2	5.57
DEC
16...	1345	62	--	11.3	8.2	324	0.5	150	39.6	11.3	1.30	0.2	6.40
JAN
16...	1200	39	--	13.3	8.3	401	0.0	190	51.5	14.3	1.43	0.3	8.85
FEB
21...	0850	52	--	11.1	8.2	379	0.2	170	46.2	13.8	1.44	0.3	8.90
MAR
27...	1240	71	--	10.6	8.4	393	4.1	170	44.5	13.3	1.30	0.4	11.8
APR
17...	0915	241	--	10.4	7.9	223	2.7	95	26.0	7.32	0.81	0.3	6.57
24...	1135	225	6.3	10.7	8.0	240	0.7	100	28.5	8.03	0.93	0.3	6.18
MAY
02...	1425	362	5.4	9.2	8.2	221	5.6	94	25.9	7.15	0.87	0.2	4.90
07...	1048	301	2.5	9.4	8.3	233	5.0	100	27.7	7.56	0.87	0.2	5.15
13...	1025	399	4.3	9.3	8.3	207	5.8	91	25.1	6.73	0.86	0.2	4.59
21...	1130	1,240	5.4	9.9	8.1	128	5.8	--	--	4.43	0.62	--	2.45
28...	1410	2,910	15	8.7	7.8	93	8.7	41	11.4	2.96	0.57	0.1	1.50
JUN
04...	1030	2,560	11	9.5	7.9	105	5.3	50	14.2	3.41	0.60	0.1	1.62
JUL
23...	1145	261	--	8.2	8.6	202	13.6	97	27.6	6.91	0.70	0.1	3.13
AUG
14...	1045	141	--	8.4	8.4	246	14.4	120	33.1	8.35	0.96	0.2	4.14
SEP
10...	1450	306	--	8.4	8.2	179	10.4	80	22.1	5.92	0.95	0.2	3.48

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

Date	Alka- linity, wat flt inc tit field, mg/L as CaCO3 (39086)	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)
OCT
22...	78	95	--	5.89	<0.2	5.3	58.4	173	0.24	31.4	E.08	0.11	<0.015
NOV
14...	69	84	--	7.26	<0.17	5.6	46.6	152	0.21	37.6	E.07	0.12	<0.015
DEC
16...	80	98	--	7.68	<0.17	6.4	60.5	184	0.25	30.8	0.11	0.12	0.023
JAN
16...	90	104	3	12.4	<0.17	6.9	79.0	231	0.31	24.4	E.06	0.11	E.008
FEB
21...	94	114	--	12.8	0.12	6.9	73.2	223	0.30	31.3	E.09	0.11	<0.015
MAR
27...	87	106	4	24.0	0.12	6.0	66.6	226	0.31	43.3	0.15	0.21	E.009
APR
17...	58	70	--	12.9	0.07	6.5	27.4	124	0.17	80.7	0.31	0.23	<0.015
24...	62	75	--	11.4	<0.17	6.39	30.6	130	0.18	78.7	--	--	--
MAY
02...	68	78	2	8.04	<0.17	6.71	22.0	117	0.16	114	--	--	--
07...	74	90	--	10.2	<0.17	6.31	22.2	125	0.17	101	--	--	--
13...	58	70	--	8.72	<0.2	5.87	19.4	106	0.14	114	--	--	--
21...	46	56	--	3.49	<0.2	5.90	8.8				0.15	0.28	<0.015
28...	36	43	--	1.93	<0.2	4.68	5.3	50	0.07	392	--	--	--
JUN
04...	42	51	--	2.03	<0.2	5.26	6.0	59	0.08	406	E.10	0.24	<0.015
JUL
23...	--	--	--	4.39	<0.2	4.4	25.6	--	--	--	0.10	0.10	<0.015
AUG
14...	78	95	6	6.09	<0.2	5.6	31.0	143	0.19	54.4	E.10	0.15	<0.015
SEP
10...	56	68	--	4.85	<0.2	5.0	23.5	100	0.14	82.6	E.08	0.35	<0.015

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

Date	Nitrite + nitrate water fltrd, mg/L as N (00631)	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...	0.193	E.002	--	0.012	0.017	0.024	--	--	--
NOV
14...	0.251	<0.002	--	0.008	0.012	0.020	1.8	43	21
DEC
16...	0.560	0.008	0.09	0.043	0.050	0.061	--	--	--
JAN
16...	0.639	0.003	--	0.048	0.055	0.068	--	--	--
FEB
21...	0.716	0.003	--	0.058	0.069	0.083	--	E5	E8
MAR
27...	0.531	0.003	--	0.030	0.037	0.066	--	--	--
APR
17...	0.403	E.002	--	0.007	0.012	0.031	4.1	E3	E2
24...	--	--	--	--	--	--	--	--	--
MAY
02...	--	--	--	--	--	--	--	--	--
07...	--	--	--	--	--	--	--	--	--
13...	--	--	--	--	--	--	--	--	--
21...	0.224	E.002	--	<0.007	0.007	0.026	--	E4	E6
28...	--	--	--	--	--	--	--	--	--
JUN
04...	0.095	0.003	--	<0.007	E.003	0.037	3.6	E5	--
JUL
23...	0.062	<0.002	--	<0.007	0.005	0.016	--	--	--
AUG
14...	0.227	0.003	--	<0.007	0.016	0.026	1.6	33	30
SEP
10...	0.187	0.003	--	0.008	0.015	0.082	--	--	--
< -- 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	Alum- inum, water, fltrd, ug/L (01106)	Arsenic water, fltrd, ug/L (01000)	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)
NOV
14...	--	--	<0.2	--	E.9	83	320	<1	73.3	97.7	<0.02	--	<3
APR
17...	--	--	E.2	--	3.7	--	530	<1	93.7	136	<0.02	--	<3
24...	28	E.1	0.33	<0.8	--	138	690	0.37	115	256	--	1.09	--
MAY
02...	31	E.2	0.24	<0.8	--	91	400	0.18	58.5	80	--	0.82	--
07...	28	E.2	0.27	<0.8	--	123	360	0.23	71.5	79	--	0.94	--
13...	25	E.2	0.20	<0.8	--	118	420	0.22	50.1	75	--	1.32	--
21...	86	E.2	0.08	0.8	--	86	420	0.40	19.5	59	--	1.61	--
28...	41	E.2	0.04	--	1.8	45	--	--	13.9	--	--	--	--
JUN
04...	32	E.1	0.04	--	1.4	39	--	<1	10.3	60.2	<0.02	--	<3
AUG
14...	--	--	<0.2	--	7.6	--	330	<1	42.9	53.0	<0.02	--	<3

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

Date	Silver, water, fltrd, ug/L (01075)	Zinc, water, fltrd, ug/L (01090)	Zinc, water, unfltrd recover -able, ug/L (01092)
NOV
14...	<0.3	53	--
APR
17...	<0.3	120	--
24...	<0.20	138	230
MAY
02...	<0.20	72	101
07...	<0.20	92	112
13...	<0.20	64	100
21...	<0.20	29	43
28...	--	12	--
JUN
04...	<0.3	11	--
AUG
14...	<0.3	23	--
< -- 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
14...	0850	92	0.5	--	3	0.72
FEB
21...	0850	52	0.2	--	4	0.56
APR
17...	0915	241	2.7	--	7	4.5
MAY
21...	1130	1,240	5.8	60	17	57
JUN
04...	1030	2,560	5.3	40	64	442
AUG
14...	1045	141	14.4	--	5	1.8