PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

402245105302300 BIG THOMPSON RIVER BELOW SANITATION OUTFLOW ABOVE LAKE ESTES, CO

WATER-QUALITY RECORDS

LOCATION.-Lat 40°22'45", long 105°30'23", in NW14NW14 sec.30, T.5 N., R.72 W., Larimer County, Hydrologic Unit 10190006, on right bank, 225 ft upstream from pedistrian bridge on Lake Estes Trail, downstream from Estes Park Sanitation District Outflow, adjacent to Lake Estes, in Estes Park.

DRAINAGE AREA.-- 138 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=402245105302300

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
07...	1045	29	9.9	9.9	7.8	46	6.5	12	3.39	0.941	0.69	0.4	3.41
NOV
18...	1045	13	1.1	9.2	8.0	62	1.5	17	4.71	1.29	0.85	0.5	4.77
DEC
09...	1035	12	<1.0	11.7	8.3	54	1.0	18	4.82	1.43	0.51	0.3	3.29
JAN
13...	1045	11	<1.0	12.0	8.0	76	1.0	21	5.59	1.74	1.14	0.6	5.86
FEB
10...	1100	8.0	1.4	11.7	8.5	84	0.0	23	5.98	1.84	1.17	0.6	6.72
MAR
17...	1120	22	14	10.4	8.2	76	2.0	18	4.76	1.37	1.08	0.8	7.46
APR
14...	1020	76	3.7	10.7	8.3	68	4.5	22	5.93	1.82	0.86	0.4	4.52
MAY
05...	1035	78	4.3	10.1	7.0	57	5.0	16	4.50	1.26	0.58	0.4	3.48
19...	1030	325	5.0	10.3	7.7	29	3.5	10	2.81	0.766	0.44	0.3	1.86
JUN
02...	1035	1,060	5.5	10.1	7.6	17	5.5	7	1.97	0.513	0.41	0.2	1.07
16...	1040	619	1.9	9.5	7.5	17	7.5	6	1.80	0.458	0.31	0.2	0.99
JUL
07...	1040	313	1.6	8.6	7.8	17	10.5	6	1.79	0.442	0.26	0.2	1.22
21...	1020	242	2.0	8.4	7.4	19	12.0	6	1.85	0.443	0.29	0.2	1.11
AUG
11...	1050	109	1.3	8.5	8.0	26	15.0	8	2.24	0.608	0.41	0.3	1.80
SEP
08...	1025	96	1.8	8.7	7.8	29	10.5	10	2.63	0.725	0.40	0.2	1.71

402245105302300 BIG THOMPSON RIVER BELOW SANITATION OUTFLOW ABOVE LAKE ESTES, 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
07...	E13	2.76	3.0	--	--	--	34	0.56	0.370	0.115	0.033	0.042	0.059
NOV
18...	20	4.37	3.7	34	0.06	1.47	42	0.80	0.429	0.276	--	--	--
DEC
09...	E19	4.27	2.9	--	--	--	42	0.11	0.021	0.212	E.004	0.009	0.011
JAN
13...	25	4.59	3.9	41	0.06	1.30	44	0.77	0.569	0.225	0.398	0.40	0.43
FEB
10...	26	6.43	4.5	45	0.08	1.28	59	0.52	0.251	0.446	0.160	0.177	0.24
MAR
17...	19	8.22	3.7	40	0.07	2.94	49	0.37	0.042	0.329	0.012	0.021	0.076
APR
14...	13	6.94	6.1	36	0.08	12.1	59	0.48	E.014	0.267	E.006	0.017	0.043
MAY
05...	13	5.24	4.5	28	0.06	9.98	47	0.23	<0.015	0.113	<0.007	0.006	0.017
19...	8	1.80	2.7	16	0.06	36.4	41	0.39	0.027	0.133	E.004	0.010	0.035
JUN
02...	6	0.71	1.7	11	0.03	73.4	26	0.27	<0.015	0.185	<0.007	0.006	0.031
16...	6	0.65	1.5	10	0.03	40.1	24	0.14	E.008	0.158	<0.007	0.004	0.018
JUL
07...	7	0.75	1.4	11	0.02	14.2	17	0.15	<0.015	0.147	<0.007	0.005	0.017
21...	7	0.76	1.3	11	0.02	10.1	15	0.25	0.073	0.127	0.012	0.015	0.025
AUG
11...	10	1.49	1.4	14	0.03	7.30	25	0.33	0.144	0.100	0.018	0.027	0.036
SEP
08...	11	1.61	2.5	17	0.03	6.48	25	0.31	0.172	0.181	0.016	0.022	0.033

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
07...	<0.3	0.8	128	0.10	5.5	<0.02	0.27	<0.2
NOV
18...	<0.3	0.8	121	E.06	8.6	<0.02	0.32	<0.2
DEC
09...	<0.3	0.5	111	<0.08	7.0	<0.02	0.34	<0.2
JAN
13...	<0.3	0.8	84	E.05	7.1	<0.02	0.40	<0.2
FEB
10...	<0.3	1.0	75	<0.08	6.9	<0.02	0.40	<0.2
MAR
17...	<0.3	1.2	181	0.18	11.5	<0.02	0.36	<0.2
APR
14...	<0.3	1.4	182	E.07	10.1	<0.02	0.50	<0.2
MAY
05...	E.1	1.4	151	E.05	8.0	<0.02	0.42	<0.2
19...	<0.3	1.5	133	0.10	6.9	<0.02	0.31	<0.2
JUN
02...	<0.3	1.3	87	<0.08	5.3	<0.02	0.31	<0.2
16...	<0.3	0.9	68	<0.08	3.7	<0.02	0.28	<0.2
JUL
07...	<0.3	0.7	67	<0.08	4.3	<0.02	0.17	<0.2
21...	<0.3	0.7	81	<0.08	3.9	<0.02	0.16	<0.2
AUG
11...	<0.3	0.7	102	<0.08	3.5	<0.02	0.21	<0.2
SEP
08...	<0.3	0.9	99	E.05	4.9	<0.02	0.12	<0.2
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

402245105302300 BIG THOMPSON RIVER BELOW SANITATION OUTFLOW ABOVE LAKE ESTES, 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
07...	<0.4	<0.4	<0.4	<0.4	<0.4
NOV
18...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
09...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
13...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
10...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
17...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
14...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
05...	<0.4	<0.4	<0.4	<0.4	<0.4
19...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
02...	<0.4	<0.4	<0.4	<0.4	<0.4
16...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
07...	<0.4	<0.4	<0.4	<0.4	<0.4
21...	<0.4	<0.4	<0.4	<0.4	<0.4
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
08...	<0.4	<0.4	<0.4	<0.4	<0.4
< -- Actual value is known to be less than the value shown.