GUNNISON RIVER BASIN

384950106544200 EAST RIVER ABOVE SLATE RIVER, NEAR CRESTED BUTTE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°48'50", long 106°53'56", in NE14NW14 sec.28, T.14 S., R.85 W., Gunnison County, Hydrologic Unit 14020001, 100 ft upstream from confluence with Slate River, and 4.7 mi southeast of Crested Butte.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--April 1995 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=384950106544200

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

Date	Time	Instan- taneous dis- charge, cfs (00061)	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)	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)	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)	BOD, water, unfltrd 5 day, 20 degC mg/L (00310)
OCT
22...	1300	25	9.2	8.4	314	6.0	<0.10	<0.015	0.037	<0.002	<0.007	E.003	<2.0
DEC
04...	0840	13	11.0	8.1	333	0.5	E.09	<0.015	0.077	<0.002	<0.007	0.004	<2.0
FEB
11...	1240	12	10.5	8.4	348	1.5	E.07	<0.015	0.059	<0.002	<0.007	<0.004	<2.0
APR
15...	1250	80	10.6	8.4	313	2.7	0.20	0.027	0.177	E.002	<0.007	0.025	<2.0
JUN
17...	1550	327	7.9	8.1	231	12.0	0.11	<0.015	0.075	<0.002	<0.007	0.019	<2.0
AUG
26...	1520	61	7.5	8.4	295	14.4	0.13	<0.015	0.033	<0.002	<0.007	0.020	<2.0

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

Date	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
22...	E9
DEC
04...	E2
FEB
11...	E2
APR
15...	<1
JUN
17...	100
AUG
26...	E22
< -- 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	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)
AUG
26...	1525	670	686.2	1,100	9.9	17.7	20.0