PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

06733000 BIG THOMPSON RIVER AT ESTES PARK, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°22'42", long 105°30'48", in NW14NW14 sec.30, T.5 N., R.72 W., Larimer County, Hydrologic Unit 10190006, on right bank in Estes Park, 600 ft downstream from bridge on State Hwy 7, 0.3 mi northwest of Estes Power Plant, in Estes Park.

DRAINAGE AREA.--137 mi2.

PERIOD OF RECORD.--August 2000 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06733000

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
07...	0905	28	7.1	9.4	7.5	32	5.5	11	3.11	0.880	0.41	0.3	1.98
NOV
18...	0905	12	<1.0	10.8	7.7	47	0.5	16	4.28	1.20	0.41	0.3	2.90
DEC
09...	0905	11	<1.0	11.6	7.7	52	0.0	17	4.64	1.38	0.47	0.3	3.13
JAN
13...	0930	10	<1.0	11.3	7.8	54	0.5	19	5.03	1.49	0.48	0.4	3.59
FEB
10...	0915	7.1	<1.0	11.3	8.0	60	0.5	21	5.49	1.68	0.52	0.4	3.95
MAR
17...	0925	21	7.7	10.8	7.8	61	1.5	17	4.52	1.35	0.79	0.5	5.08
APR
14...	0915	76	11	10.5	7.8	64	3.5	20	5.49	1.64	0.83	0.4	3.85
MAY
05...	0920	68	2.5	10.1	7.1	51	4.0	16	4.30	1.22	0.44	0.3	3.04
19...	0900	325	5.1	10.4	7.8	28	3.5	10	2.76	0.755	0.51	0.2	1.73
JUN
02...	0915	1,060	5.6	9.9	7.0	17	4.5	7	1.93	0.504	0.47	0.2	1.01
16...	0935	619	2.0	9.4	7.1	17	7.0	6	1.78	0.453	0.29	0.2	0.92
JUL
07...	0920	311	1.5	10.2	7.7	15	9.5	6	1.71	0.421	0.19	0.2	1.01
21...	0905	242	2.4	8.5	7.0	16	11.0	6	1.76	0.414	0.22	0.2	0.91
AUG
11...	0945	109	1.6	7.9	7.3	21	13.5	8	2.12	0.570	0.33	0.2	1.40
SEP
08...	0915	96	1.7	8.5	7.5	24	10.0	9	2.52	0.633	0.34	0.2	1.41

06733000 BIG THOMPSON RIVER AT ESTES PARK, CO-Continued

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

Date	Alka- linity, wat flt fxd end lab, mg/L as CaCO3 (29801)	Chlor- ide, water, fltrd, mg/L (00940)	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)	Residue on evap. at 180degC wat flt mg/L (70300)	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)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, fltrd, mg/L (00666)	Phos- phorus, water, unfltrd mg/L (00665)
OCT
07...	E13	1.36	2.3	--	--	--	21	E.10	<0.015	0.120	<0.007	E.004	0.007
NOV
18...	17	2.63	2.9	25	0.05	1.21	39	0.23	<0.015	0.205	<0.007	E.003	<0.004
DEC
09...	E19	2.46	2.8	--	--	--	35	E.08	<0.015	0.207	<0.007	E.004	0.005
JAN
13...	20	2.05	2.7	28	0.06	1.13	42	E.08	<0.015	0.196	<0.007	E.003	0.005
FEB
10...	23	3.61	3.1	33	0.06	0.90	47	E.08	<0.015	0.180	<0.007	E.003	E.002
MAR
17...	18	5.59	3.2	32	0.06	2.52	45	0.19	<0.015	0.199	E.004	0.011	0.026
APR
14...	13	6.37	5.6	33	0.08	12.8	62	0.38	<0.015	0.253	<0.007	0.006	0.028
MAY
05...	13	4.58	4.2	26	0.06	8.66	47	0.19	<0.015	0.065	<0.007	E.003	0.009
19...	8	1.70	2.7	16	0.05	32.7	37	0.40	<0.015	0.133	<0.007	0.006	0.026
JUN
02...	6	0.60	1.7	11	0.04	77.1	27	0.78	<0.015	0.181	<0.007	0.007	0.031
16...	6	0.54	1.4	10	0.04	44.2	26	0.11	<0.015	0.158	<0.007	E.003	0.013
JUL
07...	7	0.57	1.3	10	0.02	9.51	11	0.15	<0.015	0.138	<0.007	E.003	0.009
21...	7	0.53	1.2	10	0.02	11.3	17	0.18	<0.015	0.128	<0.007	E.004	0.010
AUG
11...	9	0.86	1.2	12	0.03	6.79	23	E.10	<0.015	0.102	<0.007	E.004	0.008
SEP
08...	--	1.06	1.8	--	--	--	29	E.10	<0.015	0.179	<0.007	E.004	0.010

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

Date	Arsenic water, fltrd, ug/L (01000)	Copper, water, fltrd, ug/L (01040)	Iron, water, fltrd, ug/L (01046)	Lead, water, fltrd, ug/L (01049)	Mangan- ese, water, fltrd, ug/L (01056)	Mercury water, fltrd, ug/L (71890)	Nickel, water, fltrd, ug/L (01065)	Silver, water, fltrd, ug/L (01075)
OCT
07...	<0.3	0.6	131	E.04	5.2	<0.02	0.22	<0.20
NOV
18...	<0.3	0.5	120	0.10	10.1	<0.02	0.26	<0.20
DEC
09...	<0.3	0.8	104	E.04	8.3	<0.02	0.35	<0.20
JAN
13...	<0.3	0.6	77	<0.08	7.0	<0.02	0.31	<0.20
FEB
10...	<0.3	0.5	84	<0.08	6.8	<0.02	0.29	<0.20
MAR
17...	E.2	1.0	203	0.13	11.9	<0.02	0.30	<0.20
APR
14...	<0.3	1.4	201	E.06	11.6	<0.02	0.51	<0.20
MAY
05...	E.1	1.4	151	E.07	8.5	<0.02	0.40	<0.20
19...	<0.3	1.5	127	0.08	6.6	<0.02	0.29	<0.20
JUN
02...	<0.3	1.3	90	E.04	5.1	<0.02	0.32	<0.20
16...	<0.3	1.0	71	<0.08	3.6	<0.02	0.27	<0.20
JUL
07...	<0.3	0.8	60	E.04	3.9	<0.02	0.18	<0.20
21...	<0.3	0.6	78	<0.08	3.4	<0.02	0.15	<0.20
AUG
11...	<0.3	0.6	101	<0.08	3.8	<0.02	0.19	<0.20
SEP
08...	<0.3	0.7	114	E.04	5.0	<0.02	0.13	<0.20
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

06733000 BIG THOMPSON RIVER AT ESTES PARK, CO-Continued

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

Date	Benzene water unfltrd ug/L (34030)	Ethyl- benzene water unfltrd ug/L (34371)	meta- + para- Xylene, water, unfltrd ug/L (85795)	o- Xylene, water, unfltrd ug/L (77135)	Toluene water unfltrd ug/L (34010)
OCT
07...	<0.4	<0.4	<0.4	<0.4	<0.4
NOV
18...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
09...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
13...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
10...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
17...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
14...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
05...	<0.4	<0.4	<0.4	<0.4	<0.4
19...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
02...	<0.4	<0.4	<0.4	<0.4	<0.4
16...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
07...	<0.4	<0.4	<0.4	<0.4	<0.4
21...	<0.4	<0.4	<0.4	<0.4	<0.4
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
08...	<0.4	<0.4	<0.4	<0.4	<0.4
< -- Actual value is known to be less than the value shown.