COLORADO RIVER MAIN STEM

THREE LAKES WATER-QUALITY STUDY -- Continued

09019000 COLORADO RIVER BELOW LAKE GRANBY, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°08'39", long 105°52'00", in SE14SE14 sec.11, T.2 N., R.76 W., 0.3 mi downstream from Granby Dam, 1 mi upstream from Walden Hollow, and 6 mi northeast of Granby.

DRAINAGE AREA.--312 mi2.

PERIOD OF RECORD.--November 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=09019000

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 fxd end lab, mg/L as CaCO3 (29801)
NOV
13...	1045	20	10.2	8.2	63	6.5	25	7.71	1.42	0.70	0.2	2.26	--
JAN
15...	1230	20	11.0	8.1	65	3.0	25	7.76	1.44	0.77	0.2	2.25	27
MAR
12...	1345	20	10.9	8.5	65	3.5	27	8.26	1.52	0.81	0.2	2.42	29
MAY
29...	1415	66	9.4	7.8	83	9.0	34	10.4	2.01	1.07	0.4	5.01	33
JUL
23...	1215	86	10.4	8.2	69	9.0	27	8.18	1.56	0.894	0.2	2.55	26
SEP
25...	1330	12	11.0	8.2	66	11.0	30	9.16	1.65	0.909	0.2	2.86	26

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

Date	Chlor- ide, water, fltrd, mg/L (00940)	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, 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, unfltrd mg/L (00665)	Organic carbon, water, fltrd, mg/L (00681)
NOV
13...	0.31	--	3.07	33	0.04	1.77	--	0.011	0.019	0.013	0.014	--
JAN
15...	0.49	3.85	3.26	36	0.05	1.97	--	--	--	--	--	2.6
MAR
12...	0.50	4.26	3.36	39	0.05	2.10	E.17	E.005	0.052	0.003	E.006	2.7
MAY
29...	1.51	8.07	5.32	54	0.07	9.56	0.25	E.009	0.044	<0.007	0.024	4.2
JUL
23...	1.10	6.44	4.41	42	0.06	9.65	0.19	<0.015	0.131	E.006	0.021	4.5
SEP
25...	1.01	7.37	4.25	43	0.06	1.40	0.21	<0.015	0.133	E.006	0.025	3.8
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.