GRAND LAKE OUTLET BASIN

THREE LAKES WATER-QUALITY STUDY-Continued

09013500 EAST INLET NEAR GRAND LAKE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°14'11", long 105°47'52" (revised), in NW14 sec.9, T.3 N., R.75 W., Grand County, Hydrologic Unit 14010001, approximately 0.15 mi upstream from high-water line of Grand Lake and 1 mi southeast of town of Grand Lake.

DRAINAGE AREA.--27.2 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=09013500

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

Date	Time	Instan- taneous dis- charge, cfs (00061)	Dis- solved oxygen, mg/L (00300)	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)	Chlor- ide, water, fltrd, mg/L (00940)
OCT
22...	1305	3.5	9.9	19	4.5	7	2.26	0.361	0.18	0.2	1.06	--	<0.20
NOV
22...	1420	4.0	10.8	21	0.1	7	2.14	0.355	0.16	0.2	1.03	6	0.17
MAR
03...	1400	4.0	11.5	23	0.1	8	2.50	0.405	0.21	0.2	1.20	7	0.15
MAY
01...	1040	30	10.4	--	1.0	9	2.67	0.471	0.33	0.2	1.16	6	0.37
12...	1010	17	10.1	21	4.3	9	2.71	0.463	0.31	0.2	1.34	7	0.33
21...	1145	127	10.5	19	3.2	7	2.16	0.353	0.26	0.1	0.85	4	0.26
JUN
02...	1430	432	9.8	15	6.2	5	1.60	0.271	0.22	0.1	0.66	3	0.19
18...	1050	388	10.6	12	5.0	5	1.47	0.239	0.157	0.1	0.62	3	0.11
JUL
08...	1045	138	9.4	12	9.5	4	1.43	0.212	0.138	0.1	0.68	4	0.10
AUG
14...	1000	18	8.4	17	13.0	6	1.78	0.286	0.143	0.2	0.86	5	0.08
SEP
16...	1430	25	9.2	19	8.6	6	1.83	0.287	0.158	0.1	0.71	5	0.10

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

Date	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)
OCT
22...	--	2.16	--	--	--	--	--	--	--	--	--
NOV
22...	4.41	2.13	14	0.02	0.15	--	--	--	--	--	1.6
MAR
03...	5.76	2.31	18	0.02	0.19	0.41	0.015	0.204	E.002	<0.003	1.5
MAY
01...	6.16	2.70	18	0.02	1.45	0.23	<0.015	0.097	<0.007	0.004	6.5
12...	6.27	2.71	19	0.03	0.84	0.20	<0.015	0.069	<0.007	0.008	5.9
21...	4.87	1.97	14	0.02	4.68	0.20	<0.015	0.082	<0.007	0.008	6.2
JUN
02...	3.81	1.44	11	0.01	12.3	0.20	<0.015	0.086	<0.007	0.009	5.1
18...	3.70	1.25	10	0.01	10.3	0.12	<0.015	0.063	<0.007	0.007	3.5
JUL
08...	3.00	1.12	9	0.01	3.40	0.12	<0.015	0.044	<0.007	0.006	<0.3
AUG
14...	3.20	1.43	11	0.02	0.54	0.10	<0.015	0.081	<0.007	0.004	1.4
SEP
16...	3.54	1.75	12	0.02	0.79	0.11	<0.015	0.110	<0.007	0.004	1.8
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.