COLORADO RIVER MAIN STEM

THREE LAKES WATER-QUALITY STUDY-Continued

09018300 GRANBY PUMP CANAL NEAR GRAND LAKE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°12'24", long 105°50'56" (revised), in SW14NE14 sec.24, T.3 N., R.76 W., Grand County, Hydrologic Unit 14010001, at road crossing at south end of Shadow Mountain Lake, 4 mi southwest of Grand Lake, and 13.5 mi northeast of Granby.

PERIOD OF RECORD.--September 1970 to September 1975, March 1978 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09018300

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
15...	0910	579	8.5	7.6	62	6.5	25	7.82	1.41	0.70	0.2	2.24	--
JAN
28...	1045	268	9.0	7.8	64	3.5	26	7.87	1.45	0.80	0.2	2.34	28
AUG
21...	0750	360	3.8	7.4	68	9.0	28	8.63	1.61	0.900	0.2	2.58	29
SEP
17...	0800	690	3.1	7.1	64	10.0	24	7.31	1.45	0.878	0.2	2.37	--

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
15...	0.97	--	3.08	--	--	--	0.29	0.009	0.019	0.002	0.017	--
JAN
28...	0.48	4.06	3.30	37	0.05	27.1	0.22	0.016	0.048	E.002	E.004	2.5
AUG
21...	1.07	7.70	4.35	45	0.06	43.5	0.16	<0.015	0.154	0.012	0.029	3.8
SEP
17...	0.94	7.11	4.18	--	--	--	0.21	<0.015	0.159	0.010	0.029	4.1
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.