GUNNISON RIVER BASIN

385240106583600 SLATE RIVER ABOVE COAL CREEK, NEAR CRESTED BUTTE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°53'22", long 106°59'48", in SW14SW14 sec.27, T.13 S., R.86 W., Gunnison County, Hydrologic Unit 14020001, 2.9 mi upstream from confluence with Coal Creek, and 1.5 mi northwest of Crested Butte.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD--April 1995 to August 2003 (discontinued). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=385240106583600

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
21...	1650	14	<1.0	7.6	7.3	132	9.3	59	20.0	2.21	<0.10	<0.015	0.039
DEC
02...	1432	15	--	9.7	7.2	136	1.5	--	--	--	<0.10	<0.015	0.062
FEB
10...	1540	6.7	--	8.4	7.2	144	0.6	--	--	--	<0.10	<0.015	0.062
APR
14...	1620	93	7.3	8.8	7.4	133	4.0	58	19.4	2.27	0.13	E.008	0.182
JUN
16...	1600	321	2.2	8.1	7.4	67	9.0	32	11.1	1.14	E.07	<0.015	0.073
AUG
25...	1550	12	1.6	6.1	7.2	133	15.1	58	19.3	2.33	E.08	<0.015	0.053

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
21...	<0.002	<0.007	E.002	<1
DEC
02...	<0.002	<0.007	0.005	<1
FEB
10...	<0.002	<0.007	<0.004	E1
APR
14...	<0.002	<0.007	0.028	<1
JUN
16...	<0.002	<0.007	0.009	E3
AUG
25...	<0.002	<0.007	<0.004	E7
< -- 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
21...	<20	E.2	<1.2	12	<1	5.9	<0.3	25
APR
14...	M	0.2	1.7	24	<1	17.2	<0.3	31
JUN
16...	19	0.3	1.4	23	1	8.5	<0.3	40
AUG
25...	7	E.1	<1.2	20	<1	7.9	<0.3	22
< -- 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)	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
25...	1600	1,100	1,083	0.3	<0.6	<16.200
< -- Actual value is known to be less than the value shown.

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
21...	1650	14	9.3	<0.5	--
APR
14...	1620	93	4.0	24	6.1
JUN
16...	1600	321	9.0	7	6.3
AUG
25...	1550	12	15.1	1	0.03
< -- Actual value is known to be less than the value shown.