PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

402227105134700 HANSEN CANAL BELOW FLATIRON RESERVOIR NEAR LOVELAND, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°22'27", long 105°13'47", in NW14NW14 sec.27, T.5 N., R.70 W., Larimer County, Hydrologic Unit 10190006, at siphon entrance at north end of Flatiron Reservoir, 10 mi southwest of Loveland.

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=402227105134700

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
10...	1300	14	3.2	--	8.5	61	15.5	26	7.88	1.43	0.67	0.2	2.34
NOV
21...	1235	77	1.4	--	7.7	50	4.0	20	6.07	1.22	0.64	0.2	2.01
DEC
12...	1240	66	1.5	10.7	8.1	54	2.5	22	6.64	1.29	0.65	0.2	2.11
JAN
16...	1235	112	1.1	10.9	8.1	63	2.5	26	8.03	1.51	0.77	0.2	2.46
FEB
13...	1300	62	1.3	11.0	8.4	65	2.5	25	7.73	1.47	0.78	0.2	2.54
MAR
28...	0915	58	6.5	12.7	8.0	75	5.0	30	8.96	1.88	0.75	0.3	3.21
APR
17...	1245	48	2.2	9.7	8.6	85	9.5	32	9.45	2.01	1.01	0.3	4.04
MAY
09...	0855	50	4.8	9.1	7.7	101	10.5	32	9.18	2.31	1.02	0.4	5.61
23...	0925	255	3.1	9.9	7.7	63	10.5	21	5.98	1.55	0.77	0.3	3.57
JUN
05...	1245	415	5.5	10.3	7.5	26	10.0	10	2.98	0.691	0.56	0.2	1.39
19...	1230	542	3.2	9.4	7.6	23	11.0	8	2.41	0.589	0.33	0.2	1.22
JUL
09...	1300	368	3.6	8.3	7.4	23	16.0	9	2.53	0.548	0.27	0.2	1.27
24...	1130	341	4.2	8.0	7.2	20	18.0	8	2.39	0.479	0.25	0.2	1.05
AUG
14...	1200	438	2.9	7.8	7.6	33	19.5	14	4.06	0.865	0.41	0.2	1.50
SEP
11...	1130	494	3.4	8.3	7.6	51	15.5	20	5.89	1.25	0.51	0.2	1.83

402227105134700 HANSEN CANAL BELOW FLATIRON RESERVOIR NEAR LOVELAND, 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
10...	E28	0.77	2.8	--	--	--	35	0.31	<0.015	<0.022	<0.007	0.005	0.026
NOV
21...	23	0.74	2.8	28	0.05	7.31	35	0.16	E.009	0.062	<0.007	E.003	0.005
DEC
12...	E24	1.33	2.6	--	--	--	32	0.20	E.011	0.056	<0.007	E.003	0.010
JAN
16...	29	0.44	3.0	34	0.05	12.0	40	0.22	<0.015	0.042	<0.007	E.004	0.012
FEB
13...	30	1.29	3.2	35	0.06	7.31	44	0.17	<0.015	0.043	<0.007	0.005	0.014
MAR
28...	31	2.51	4.3	41	0.07	8.59	55	0.27	<0.015	0.144	<0.007	E.004	0.019
APR
17...	31	4.34	4.5	44	0.07	6.77	53	0.47	<0.015	E.013	<0.007	0.005	0.017
MAY
09...	26	9.59	6.8	50	0.09	8.68	65	0.38	E.011	0.118	<0.007	0.004	0.024
23...	17	5.45	4.6	33	0.06	32.8	48	0.38	0.018	0.140	<0.007	0.005	0.019
JUN
05...	9	1.26	2.0	15	0.04	30.3	27	0.26	E.009	0.164	<0.007	0.005	0.022
19...	8	1.06	1.7	13	0.03	37.4	26	0.18	0.016	0.152	<0.007	0.005	0.015
JUL
09...	9	0.86	1.6	13	0.03	18.7	19	0.18	E.012	0.088	<0.007	0.006	0.014
24...	9	0.67	1.4	12	0.03	17.2	19	0.22	E.009	0.066	<0.007	0.005	0.016
AUG
14...	14	0.56	2.2	18	0.04	33.4	28	0.25	E.012	0.028	<0.007	0.004	0.020
SEP
11...	22	1.03	3.1	27	0.04	41.9	31	0.27	0.023	0.034	<0.007	E.004	0.023

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
10...	0.5	2.1	16	E.04	1.7	<0.02	0.34	<0.20
NOV
21...	E.2	2.4	17	E.05	2.2	<0.02	0.35	<0.20
DEC
12...	E.2	0.6	E8	<0.08	0.7	<0.02	0.46	<0.20
JAN
16...	E.2	0.7	E10	0.17	13.1	<0.02	0.49	<0.20
FEB
13...	E.2	0.8	E10	<0.08	3.2	<0.02	0.44	<0.20
MAR
28...	E.2	1.6	20	<0.08	0.4	<0.02	0.29	<0.20
APR
17...	<0.3	7.3	42	<0.08	0.9	<0.02	0.53	<0.20
MAY
09...	E.2	4.3	59	E.05	0.8	<0.02	0.64	<0.20
23...	0.3	7.1	86	0.13	4.5	<0.02	0.31	<0.20
JUN
05...	E.2	1.7	84	E.06	11.1	<0.02	0.35	<0.20
19...	E.2	16.0	70	0.12	9.4	<0.02	0.29	<0.20
JUL
09...	<0.3	1.3	57	<0.08	5.3	<0.02	0.21	<0.20
24...	<0.3	1.6	53	<0.08	3.3	<0.02	0.20	<0.20
AUG
14...	E.2	1.0	47	<0.08	1.0	<0.02	0.31	<0.20
SEP
11...	E.2	6.7	52	E.05	1.6	<0.02	0.28	<0.20
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

402227105134700 HANSEN CANAL BELOW FLATIRON RESERVOIR NEAR LOVELAND, 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
10...	<0.4	<0.4	<0.4	<0.4	<0.4
NOV
21...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
12...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
16...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
13...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
28...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
17...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
09...	<0.4	<0.4	<0.4	<0.4	<0.4
23...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
05...	<0.4	<0.4	<0.4	<0.4	<0.4
19...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
10...	<0.4	<0.4	<0.4	<0.4	<0.4
24...	<0.4	<0.4	<0.4	<0.4	<0.4
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
11...	<0.4	<0.4	<0.4	<0.4	<0.4
< -- Actual value is known to be less than the value shown.