PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

06736700 BIG THOMPSON RIVER ABOVE DILLIE TUNNEL NEAR DRAKE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°24'54", long 105°15'00", in SE14NE14 sec.8, T.5 N., R.70 W., Larimer County, Hydrologic Unit 10190006, approximately 250 ft upstream of Hwy 34 bridge, approximately 1 mi downstream of inflow of Cedar Creek, 1 mi east of Cedar Cove.

DRAINAGE AREA.--305 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=06736700

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
09...	0855	44	6.8	--	7.7	56	8.5	18	5.31	1.13	0.70	0.4	3.83
NOV
20...	0905	27	1.1	11.7	7.6	61	0.5	20	5.79	1.26	0.69	0.4	3.59
DEC
11...	0900	29	1.3	12.0	7.8	76	0.0	25	7.61	1.54	1.01	0.4	4.40
JAN
15...	0900	25	<1.0	11.9	7.8	73	0.5	26	7.65	1.56	1.13	0.4	4.21
FEB
12...	1020	29	<1.0	12.1	8.2	82	0.5	27	8.16	1.69	1.05	0.4	5.14
MAR
26...	0930	77	2.7	11.2	7.3	151	5.0	46	13.1	3.17	1.46	0.6	9.27
APR
16...	0900	93	4.4	9.8	7.4	116	6.5	37	10.3	2.67	1.32	0.5	7.49
MAY
07...	0925	130	5.2	10.3	7.6	92	7.0	29	8.13	2.09	0.89	0.4	5.33
21...	0940	237	3.5	10.2	7.8	67	7.5	22	6.12	1.56	0.87	0.4	4.19
JUN
04...	0920	803	5.7	9.3	7.3	29	9.5	11	3.12	0.723	0.60	0.2	1.79
18...	0935	260	4.6	8.8	7.4	38	11.5	13	3.68	0.871	0.62	0.3	2.38
JUL
09...	0900	191	1.5	8.0	7.4	29	14.0	10	2.79	0.630	0.47	0.3	2.08
23...	0915	182	2.6	8.0	7.3	27	16.5	10	2.85	0.617	0.46	0.3	1.94
AUG
13...	0915	162	2.9	8.0	7.6	40	17.5	14	4.14	0.933	0.55	0.3	2.25
SEP
10...	0925	101	1.2	8.1	7.4	55	13.5	19	5.52	1.29	0.66	0.3	2.62

06736700 BIG THOMPSON RIVER ABOVE DILLIE TUNNEL NEAR DRAKE, 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
09...	E21	2.68	3.3	--	--	--	36	0.26	<0.015	0.036	0.034	0.044	0.057
NOV
20...	23	2.77	3.5	33	0.05	2.80	39	0.19	<0.015	0.311	0.012	0.019	0.032
DEC
11...	E27	3.00	4.0	--	--	--	51	0.22	<0.015	0.567	0.029	0.037	0.048
JAN
15...	28	2.31	3.7	40	0.07	3.28	48	0.27	0.088	0.500	0.042	0.047	0.059
FEB
12...	29	4.41	4.5	45	0.07	3.96	51	0.24	0.056	0.534	0.034	0.042	0.053
MAR
26...	27	13.8	12.0	77	0.14	21.0	101	0.44	E.009	1.77	0.023	0.034	0.050
APR
16...	27	10.1	9.5	59	0.11	21.2	84	0.49	E.009	0.386	0.009	0.021	0.067
MAY
07...	21	8.91	7.2	46	0.09	22.1	63	0.40	E.008	0.186	E.004	0.013	0.043
21...	17	4.64	5.7	35	0.08	39.6	62	0.41	E.008	0.240	0.011	0.018	0.050
JUN
04...	10	1.20	2.3	16	0.04	70.4	32	0.36	<0.015	0.177	E.006	0.012	0.038
18...	12	2.05	2.8	21	0.06	28.6	41	0.24	E.011	0.298	0.015	0.022	0.043
JUL
09...	10	1.57	2.0	17	0.04	14.4	28	0.26	0.016	0.266	0.035	0.043	0.061
23...	10	1.40	1.8	16	0.04	13.3	27	0.20	E.010	0.285	0.044	0.054	0.061
AUG
13...	15	1.39	2.5	21	0.04	13.2	30	0.25	<0.015	0.156	0.034	0.042	0.059
SEP
10...	21	2.10	3.3	29	0.06	12.9	47	0.25	<0.015	0.264	0.027	0.039	0.061

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
09...	0.3	0.9	72	0.16	3.5	<0.02	0.38	<0.20
NOV
20...	E.1	0.7	32	E.06	3.3	<0.02	0.38	<0.20
DEC
11...	E.2	0.9	37	E.07	3.8	<0.02	0.60	<0.20
JAN
15...	<0.3	0.8	20	0.17	3.4	<0.02	0.47	<0.20
FEB
12...	<0.3	0.9	23	<0.08	2.2	<0.02	0.43	<0.20
MAR
26...	E.3	1.6	68	E.06	7.0	<0.02	0.50	<0.20
APR
16...	E.2	1.7	76	E.07	9.4	<0.02	0.71	<0.20
MAY
07...	E.2	1.4	94	0.09	10.4	<0.02	0.59	<0.20
21...	E.3	1.7	89	0.09	6.1	<0.02	0.39	<0.20
JUN
04...	<0.3	1.2	75	<0.08	4.1	<0.02	0.34	<0.20
18...	<0.3	1.0	57	E.05	3.1	<0.02	0.31	<0.20
JUL
09...	<0.3	0.9	52	E.04	2.9	<0.02	0.24	<0.20
23...	<0.3	0.8	61	<0.08	2.3	<0.02	0.20	<0.20
AUG
13...	E.2	0.7	51	<0.08	2.9	<0.02	0.33	<0.20
SEP
10...	E.2	0.7	46	0.09	3.2	<0.02	0.17	<0.20
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

06736700 BIG THOMPSON RIVER ABOVE DILLIE TUNNEL NEAR DRAKE, 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
09...	<0.4	<0.4	<0.4	<0.4	<0.4
NOV
20...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
11...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
15...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
12...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
26...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
16...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
07...	<0.4	<0.4	<0.4	<0.4	<0.4
21...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
04...	<0.4	<0.4	<0.4	<0.4	<0.4
18...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
09...	<0.4	<0.4	<0.4	<0.4	<0.4
23...	<0.4	<0.4	<0.4	<0.4	<0.4
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
10...	<0.4	<0.4	<0.4	<0.4	<0.4
< -- Actual value is known to be less than the value shown.