GRAND LAKE OUTLET

BIG THOMPSON PROJECT

The primary objective of this sampling program is to establish a baseline water quality network. The sites in this program make up a large portion of the Colorado/Big Thompson Water Diversion project and constitute a cooperative effort between the USGS, the Big Thompson Watershed Forum, North Front Range Water Quality Planning Association, US Bureau of Reclamation, State Engineer, water managers, and Colorado State University.

09013000 ALVA B. ADAMS TUNNEL AT EAST PORTAL, NEAR ESTES PARK, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 40°19'40", long 105°34'39", in SW14NW14 sec.9, T.4 N., R.73 W., Larimer County, Hydrologic Unit 10190006, on right bank at upstream end of Aspen Creek siphon, 700 ft downstream from east portal, and 4.5 mi southwest of Estes Park.

PERIOD OF RECORD.--September 1970 to current year. Water-discharge records published from October 1946 to September 1998 (monthly discharge only for August and September 1947). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09013000

REMARKS.--Field data collected prior to 1974 water year are available in district office.

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
19...	0855	471	<1.0	8.2	7.4	51	4.5	21	6.31	1.18	0.62	0.2	1.92
DEC
10...	0850	514	1.4	8.6	7.7	54	3.5	22	6.79	1.29	0.70	0.2	2.02
JAN
14...	0855	413	<1.0	8.7	7.8	63	2.5	27	8.28	1.51	0.76	0.2	2.40
FEB
11...	0900	477	<1.0	8.3	7.8	63	2.5	26	7.94	1.48	0.80	0.2	2.35
MAR
25...	0930	0.40	2.6	9.9	7.2	65	5.0	27	8.42	1.50	0.77	0.2	2.68
APR
15...	0915	0.60	4.7	9.7	8.9	130	8.5	34	10.3	1.99	1.25	1	15.4
MAY
06...	0915	23	<1.0	10.2	7.9	55	5.0	21	6.53	1.20	0.65	0.2	2.45
20...	0910	20	3.3	9.1	8.0	44	5.0	17	4.99	1.05	0.65	0.3	2.46
JUN
03...	0945	408	1.5	8.4	7.5	37	6.0	16	4.91	0.900	0.59	0.2	1.57
17...	0925	8.6	3.5	9.1	7.3	24	7.5	8	2.22	0.662	0.38	0.3	2.13
JUL
08...	0910	195	<1.0	8.0	7.4	17	13.0	7	2.14	0.374	0.23	0.2	0.98
22...	0930	242	1.6	7.3	7.1	17	17.0	7	2.13	0.355	0.20	0.1	0.80
AUG
12...	0920	487	1.2	7.0	7.6	36	18.5	15	4.37	0.899	0.39	0.2	1.37
SEP
09...	0905	400	2.6	8.0	8.0	52	14.5	21	6.35	1.29	0.55	0.2	1.78

09013000 ALVA B. ADAMS TUNNEL AT EAST PORTAL, NEAR ESTES PARK, 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)
NOV
19...	24	0.47	2.8	28	0.05	50.0	39	0.16	<0.015	0.057	<0.007	E.003	E.002
DEC
10...	E25	1.05	2.7	--	--	--	41	0.20	<0.015	0.042	<0.007	E.003	0.008
JAN
14...	29	0.29	3.0	34	0.06	48.3	43	0.18	<0.015	0.033	<0.007	E.004	0.007
FEB
11...	30	0.35	3.0	34	0.06	55.2	43	0.15	<0.015	0.047	<0.007	<0.004	0.010
MAR
25...	31	0.55	3.0	36	0.06	0.04	41	0.18	<0.015	0.044	<0.007	E.004	0.015
APR
15...	59	1.47	5.6	71	0.11	0.13	79	0.33	<0.015	E.015	<0.007	E.004	0.026
MAY
06...	25	0.55	3.1	30	0.07	3.19	50	0.12	<0.015	0.059	<0.007	<0.004	0.009
20...	19	0.49	3.1	25	0.06	2.24	42	0.18	<0.015	0.047	<0.007	0.005	0.017
JUN
03...	16	0.35	2.1	21	0.05	43.9	40	0.18	<0.015	0.079	<0.007	E.004	0.012
17...	11	0.30	2.1	14	0.05	0.78	34	0.15	<0.015	E.011	<0.007	0.005	0.012
JUL
08...	8	E.19	1.4	--	--	--	16	0.18	<0.015	E.011	<0.007	E.003	0.007
22...	8	0.31	1.3	10	0.03	12.3	19	0.14	<0.015	<0.022	<0.007	E.004	0.006
AUG
12...	15	0.21	2.6	19	0.04	42.6	32	0.21	<0.015	<0.022	<0.007	0.007	0.012
SEP
09...	23	0.78	3.4	28	0.05	43.0	40	0.31	<0.015	<0.022	<0.007	E.003	0.014

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
19...	E.2	0.5	E6	<0.08	0.5	<0.02	0.36	<0.20
DEC
10...	E.3	0.5	E6	<0.08	2.6	<0.02	0.46	<0.20
JAN
14...	E.2	0.5	13	0.15	49.6	<0.02	0.48	<0.20
FEB
11...	E.2	0.5	17	<0.08	22.9	<0.02	0.44	<0.20
MAR
25...	0.3	0.7	34	E.06	8.7	<0.02	0.25	<0.20
APR
15...	0.8	1.1	22	<0.08	59.8	<0.02	0.51	<0.20
MAY
06...	E.2	0.7	24	<0.08	1.6	<0.02	0.36	<0.20
20...	E.2	0.8	53	E.04	2.9	<0.02	0.16	<0.20
JUN
03...	E.1	0.7	31	<0.08	2.3	<0.02	0.26	<0.20
17...	<0.3	0.6	44	<0.08	1.8	<0.02	0.19	<0.20
JUL
08...	<0.3	0.7	25	<0.08	1.9	<0.02	0.55	<0.20
22...	<0.3	0.5	18	<0.08	0.8	<0.02	0.13	<0.20
AUG
12...	E.2	0.6	63	<0.08	0.7	<0.02	0.31	<0.20
SEP
09...	E.2	0.6	41	<0.08	0.5	<0.02	0.14	<0.20
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

09013000 ALVA B. ADAMS TUNNEL AT EAST PORTAL, NEAR ESTES PARK, 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)
NOV
19...	<0.4	<0.4	<0.4	<0.4	<0.4
DEC
10...	<0.4	<0.4	<0.4	<0.4	<0.4
JAN
14...	<0.4	<0.4	<0.4	<0.4	<0.4
FEB
11...	<0.4	<0.4	<0.4	<0.4	<0.4
MAR
25...	<0.4	<0.4	<0.4	<0.4	<0.4
APR
15...	<0.4	<0.4	<0.4	<0.4	<0.4
MAY
06...	<0.4	<0.4	<0.4	<0.4	<0.4
20...	<0.4	<0.4	<0.4	<0.4	<0.4
JUN
03...	<0.4	<0.4	<0.4	<0.4	<0.4
17...	<0.4	<0.4	<0.4	<0.4	<0.4
JUL
08...	M	M	2	1	3
22...	M	<0.4	<0.4	<0.4	3
AUG
15...	<0.4	<0.4	<0.4	<0.4	<0.4
SEP
09...	<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.