GUNNISON RIVER BASIN

383126106475600 TOMICHI CREEK BELOW COCHETOPA CREEK NEAR PARLIN, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°31'26", long 106°47'56", in SW14NW14 sec. 7, T.49 N., R.2 E., Gunnison County, Hydrologic Unit 14020003, 100 ft south of Highway 50, 1 mi downstream of confluence with Cochetopa Creek, and 4 mi northwest of Parlin.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--March to September 1998, 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=383126106475600

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)	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)
OCT
17...	1100	28	14	10.0	8.2	319	4.5	150	43.2	10.6	0.24	<0.015	<0.022
DEC
05...	0840	22	--	10.8	8.2	269	0.0	--	--	--	0.13	<0.015	<0.022
FEB
13...	1020	45	--	10.0	7.7	236	0.2	--	--	--	0.10	<0.015	E.018
APR
17...	1015	86	E8.0	9.4	8.1	239	6.1	110	29.9	7.52	0.36	<0.015	<0.022
JUN
20...	0900	186	2.3	8.0	8.1	367	12.1	180	48.9	13.6	0.55	E.009	<0.022
AUG
28...	1010	73	4.8	8.2	8.3	256	15.1	120	34.4	8.28	0.29	<0.015	<0.022

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

Date	Nitrite water, fltrd, mg/L as N (00613)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, unfltrd mg/L (00665)	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
17...	<0.002	0.029	0.059	E14
DEC
05...	<0.002	0.024	0.039	E5
FEB
13...	<0.002	0.011	0.028	E27
APR
17...	<0.002	0.031	0.085	<1
JUN
20...	<0.002	0.011	0.044	89
AUG
28...	<0.002	0.029	0.066	E5
< -- 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	Alum- inum, water, fltrd, ug/L (01106)	Cadmium water, fltrd, ug/L (01025)	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)	Silver, water, fltrd, ug/L (01075)	Zinc, water, fltrd, ug/L (01090)
OCT
17...	<20	<0.2	<1.2	65	<1	50.3	<0.3	<24
APR
17...	<20	<0.2	<1.2	157	<1	65.5	<0.3	<24
JUN
20...	2	<0.2	1.3	98	M	71.6	<0.3	5
AUG
28...	2	<0.2	E1.0	43	<1	31.9	<0.3	E2
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value. M -- Presence of material verified but not quantified.

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

Date	Time	Peri- phyton biomass ash weight, g/m2 (00572)	Peri- phyton biomass dry weight, g/m2 (00573)	Biomass chloro- phyll ratio, peri- phyton, number (70950)	Pheo- phytin a, peri- phyton, mg/m2 (62359)	Chloro- phyll a peri- phyton, chromo- fluoro, mg/m2 (70957)	Biomass peri- phyton, ashfree drymass g/m2 (49954)
FEB
13...	1015	830	858.7	--	E22	E35.7	24.700
AUG
28...	1015	760	782.6	736	18	29.2	22.0
E -- Estimated laboratory analysis value.

SUSPENDED SEDIMENT DISCHARGE, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Temper- ature, water, deg C (00010)	Sus- pended sedi- ment concen- tration mg/L (80154)	Sus- pended sedi- ment load, tons/d (80155)
OCT
17...	1100	28	4.5	6	0.45
APR
17...	1015	86	6.1	18	4.1
JUN
20...	0900	186	12.1	6	2.8
AUG
28...	1010	73	15.1	8	1.6