PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

06736000 NORTH FORK BIG THOMPSON RIVER AT DRAKE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°26'00" (revised), long 105°20'18", (unsurveyed), Larimer County, Hydrologic Unit 10190006, on right bank 400 ft upstream from mouth and 300 ft upstream from Hwy 34 bridge at Drake.

DRAINAGE AREA.--85.1 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=06736000

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
08...	1220	7.1	2.1	--	7.7	34	10.0	11	3.30	0.773	0.53	0.3	2.45
NOV
19...	1315	4.8	<1.0	11.1	8.0	38	3.0	13	3.65	0.862	0.48	0.3	2.77
DEC
10...	1320	5.2	1.1	11.6	8.0	43	0.5	15	4.18	1.01	0.51	0.4	3.13
JAN
14...	1330	4.7	<1.0	11.7	8.0	42	0.5	14	3.89	0.945	0.41	0.4	3.08
FEB
12...	0910	3.0	<1.0	12.1	7.6	48	0.5	15	4.40	1.08	0.51	0.4	3.57
MAR
25...	1420	17	3.5	9.3	7.8	112	8.5	34	9.81	2.42	0.95	0.4	6.04
APR
15...	1345	22	3.2	8.7	8.0	61	9.5	20	5.44	1.44	0.89	0.4	4.46
MAY
06...	1350	31	5.1	8.7	7.9	58	9.5	18	4.98	1.25	0.80	0.4	4.09
20...	1330	66	3.4	9.5	8.0	49	7.5	16	4.53	1.17	0.80	0.4	3.40
JUN
03...	1345	123	2.3	9.2	7.4	26	9.5	9	2.64	0.609	0.56	0.3	1.93
17...	1335	85	1.6	8.6	7.5	24	12.5	9	2.55	0.575	0.44	0.3	1.82
JUL
08...	1310	54	1.8	8.0	7.5	23	16.0	8	2.46	0.526	0.39	0.3	1.86
22...	1310	38	2.5	7.5	7.5	24	17.5	8	2.50	0.523	0.37	0.3	1.71
AUG
12...	1350	24	1.2	7.3	7.6	30	19.5	10	3.06	0.691	0.46	0.3	2.39
SEP
09...	1320	19	1.1	8.0	7.7	30	15.0	10	2.97	0.680	0.42	0.3	1.93

06736000 NORTH FORK BIG THOMPSON RIVER AT 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
08...	E15	0.79	1.9	--	--	--	26	0.12	<0.015	0.035	<0.007	0.006	0.011
NOV
19...	16	2.28	2.5	23	0.04	0.40	31	E.06	<0.015	0.091	<0.007	0.005	0.005
DEC
10...	E18	1.87	2.7	--	--	--	29	E.07	<0.015	0.125	<0.007	0.005	0.007
JAN
14...	17	0.99	2.6	23	0.05	0.47	37	E.09	<0.015	0.144	<0.007	E.004	0.008
FEB
12...	19	2.23	3.1	27	0.06	0.34	42	E.07	<0.015	0.154	<0.007	E.003	0.005
MAR
25...	21	11.0	9.1	55	0.10	3.50	77	0.29	<0.015	0.739	E.004	0.009	0.019
APR
15...	16	3.91	6.4	32	0.08	3.47	59	0.28	<0.015	E.015	<0.007	0.007	0.021
MAY
06...	16	3.43	6.0	30	0.07	4.47	53	0.23	<0.015	<0.022	<0.007	0.005	0.018
20...	14	2.46	5.0	26	0.08	9.96	56	0.38	<0.015	0.069	<0.007	0.011	0.024
JUN
03...	9	1.09	2.3	15	0.04	10.6	32	0.25	<0.015	0.110	<0.007	0.006	0.027
17...	10	0.70	2.1	14	0.04	7.39	32	0.19	<0.015	0.096	<0.007	0.005	0.015
JUL
08...	10	0.64	1.7	14	0.04	4.76	33	0.22	<0.015	0.082	<0.007	0.006	0.019
22...	11	0.62	1.5	14	0.04	2.72	26	0.20	<0.015	0.084	<0.007	0.007	0.012
AUG
12...	13	0.94	1.5	17	0.04	2.03	31	0.17	<0.015	0.050	<0.007	0.007	0.013
SEP
09...	13	0.91	1.6	17	0.04	1.53	30	0.13	<0.015	0.129	<0.007	0.007	0.013

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
08...	E.1	0.4	85	<0.08	5.0	<0.02	0.17	<0.2
NOV
19...	<0.3	0.7	94	0.11	5.8	<0.02	0.24	<0.2
DEC
10...	E.1	0.4	92	<0.08	6.7	<0.02	0.30	<0.2
JAN
14...	<0.3	0.4	48	0.31	3.7	<0.02	0.21	<0.2
FEB
12...	<0.3	0.4	51	<0.08	4.2	<0.02	0.23	<0.2
MAR
25...	E.2	1.0	55	<0.08	3.5	<0.02	0.35	<0.2
APR
15...	<0.3	1.5	106	E.06	2.8	<0.02	0.48	<0.2
MAY
06...	E.2	1.3	75	E.04	3.2	<0.02	0.43	<0.2
20...	0.3	1.5	121	E.08	2.7	<0.02	0.37	<0.2
JUN
03...	E.2	0.8	69	<0.08	2.4	<0.02	0.28	<0.2
17...	<0.3	0.7	44	<0.08	1.9	<0.02	0.24	<0.2
JUL
08...	<0.3	0.5	41	<0.08	2.3	<0.02	0.18	<0.2
22...	<0.3	0.6	49	<0.08	2.7	<0.02	0.18	<0.2
AUG
12...	<0.3	0.5	73	<0.08	3.5	<0.02	0.26	<0.2
SEP
09...	<0.3	0.5	75	E.05	3.5	<0.02	0.12	<0.2
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

06736000 NORTH FORK BIG THOMPSON RIVER AT 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
08...	<0.4	<0.4	<0.4	<0.4	<0.4
NOV
19...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
10...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
14...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
12...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
25...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
15...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
06...	<0.4	<0.4	<0.4	<0.4	<0.4
20...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
03...	<0.4	<0.4	<0.4	<0.4	<0.4
17...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
08...	<0.4	<0.4	<0.4	<0.4	<0.4
22...	<0.4	<0.4	<0.4	<0.4	<0.4
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
09...	<0.4	<0.4	<0.4	<0.4	<0.4
< -- Actual value is known to be less than the value shown.