PLATTE RIVER BASIN

BIG THOMPSON PROJECT-Continued

06734900 OLYMPUS TUNNEL AT LAKE ESTES, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°22'30", long 105°29'13", in SE14NW14 sec.29, T.5 N., R.72 W., Larimer County, Hydrologic Unit 10190006, at tunnel entrance at south end of Olympus Dam on Lake Estes, 1.9 mi east of Estes Park.

PERIOD OF RECORD.--September 1970 to present. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06734900

REMARKS.--Field data collected prior to 1974 water year available in district office. Records of discharge are estimated values.

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)
NOV
18...	1310	472	1.2	9.5	7.8	50	3.0	20	6.14	1.17	0.58	0.2	1.99
DEC
09...	1250	435	1.2	9.3	8.0	55	10.3	22	6.78	1.31	0.66	0.2	2.13
JAN
13...	1300	427	<1.0	10.0	8.1	62	2.0	26	8.09	1.52	0.76	0.2	2.48
FEB
10...	1320	436	<1.0	9.8	8.4	65	2.0	26	7.99	1.52	0.80	0.2	2.60
MAR
17...	1340	250	3.2	10.2	8.2	64	2.5	25	7.70	1.48	0.85	0.2	2.52
APR
14...	1315	26	3.0	10.2	8.8	107	7.0	35	9.92	2.60	1.19	0.5	6.22
MAY
05...	1325	26	3.7	8.8	7.7	90	8.0	28	7.90	2.10	0.85	0.4	4.91
19...	1250	345	3.7	8.8	7.9	54	8.5	18	4.99	1.33	0.78	0.3	3.10
JUN
02...	1240	494	6.3	9.4	7.4	21	7.5	8	2.26	0.593	0.53	0.2	1.20
16...	1255	548	2.3	9.4	7.4	20	9.0	8	2.23	0.546	0.38	0.2	1.13
JUL
07...	1330	403	1.1	7.9	7.3	20	13.5	7	2.18	0.494	0.27	0.2	1.22
21...	1240	456	2.9	7.6	--	18	15.5	7	2.01	0.470	0.24	0.2	1.09
AUG
11...	1310	550	2.3	6.4	7.6	32	18.5	12	3.61	0.778	0.37	0.2	1.35
SEP
08...	1250	496	2.4	7.8	8.0	52	16.0	21	6.13	1.26	0.52	0.2	1.82

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)
NOV
18...	23	1.48	2.8	28	0.05	48.9	38	0.20	E.010	0.062	<0.007	E.004	E.003
DEC
09...	E25	0.63	2.7	--	--	--	36	0.18	0.018	0.057	<0.007	E.004	0.009
JAN
13...	29	0.42	2.9	34	0.06	49.2	43	0.21	0.015	0.040	<0.007	0.006	0.013
FEB
10...	29	1.24	3.1	35	0.06	51.0	43	0.17	<0.015	0.068	0.007	0.012	0.018
MAR
17...	29	1.33	3.0	35	0.06	29.3	43	0.15	<0.015	0.062	<0.007	0.006	0.013
APR
14...	27	10.4	6.7	54	0.09	4.78	68	0.45	E.009	0.197	<0.007	0.009	0.037
MAY
05...	20	9.51	6.2	45	0.10	4.92	70	0.33	E.011	0.288	<0.007	0.008	0.025
19...	13	4.75	4.1	28	0.06	43.5	47	0.38	0.018	0.166	<0.007	0.007	0.022
JUN
02...	7	0.92	1.8	12	0.05	45.1	34	0.25	<0.015	0.190	<0.007	0.009	0.023
16...	7	0.75	1.6	12	0.04	40.5	27	0.17	<0.015	0.149	<0.007	E.003	0.012
JUL
07...	8	0.80	1.5	12	0.02	19.7	18	0.18	0.023	0.098	<0.007	0.004	0.013
21...	8	0.60	1.4	11	0.02	21.5	17	0.16	0.042	0.069	<0.007	0.006	0.013
AUG
11...	13	0.53	2.2	17	0.04	39.9	27	0.24	0.038	0.024	<0.007	0.006	0.016
SEP
08...	22	0.97	3.3	27	0.05	52.8	39	0.29	E.009	E.011	<0.007	E.004	0.019

06734900 OLYMPUS TUNNEL AT LAKE ESTES, CO-Continued

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)
NOV
18...	E.2	0.5	15	<0.08	2.4	<0.02	0.33	<0.20
DEC
09...	E.2	0.5	14	<0.08	1.1	<0.02	0.46	<0.20
JAN
13...	E.2	0.5	11	<0.08	28.6	<0.02	0.47	<0.20
FEB
10...	E.1	0.6	18	<0.08	14.3	<0.02	0.43	<0.20
MAR
17...	E.2	0.6	31	0.78	9.1	<0.02	0.31	<0.20
APR
14...	E.1	1.0	149	E.05	1.5	<0.02	0.54	<0.20
MAY
05...	E.2	1.3	142	E.06	5.9	<0.02	0.55	<0.20
19...	E.3	1.5	120	E.07	7.0	<0.02	0.33	<0.20
JUN
02...	<0.3	1.6	100	E.06	8.9	<0.02	0.36	<0.20
16...	<0.3	1.0	78	<0.08	7.0	<0.02	0.28	<0.20
JUL
07...	<0.3	0.8	80	<0.08	9.6	<0.02	0.20	<0.20
21...	E.1	0.7	80	<0.08	8.1	<0.02	0.16	<0.20
AUG
11...	E.2	0.6	70	<0.08	2.4	<0.02	0.28	<0.20
SEP
08...	E.2	0.7	39	E.05	1.0	<0.02	0.14	<0.20
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

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)
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	M	<0.4	<0.4
JUL
07...	<0.4	<0.4	M	<0.4	M
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. M -- Presence of material verified but not quantified.