GUNNISON RIVER BASIN

385224106590100 COAL CREEK ABOVE MOUTH AT CRESTED BUTTE, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°52'24", long 106°59'01", in NE14NE14 sec.3,T.14 S., R.86 W., Gunnison County, Hydrologic Unit 14020001, at pedestrian bridge on Butte Avenue, 0.2 mi north of Crested Butte, and 0.3 mi west of Highway 135, and 0.6 mi above mouth.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD--November 2000 to current year. Published as "at mouth near Crested Butte" 2001-02. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=385224106590100

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...	1800	0.60	1.9	8.5	7.9	259	5.5	94	29.8	4.72	<0.10	<0.015	<0.022
DEC
02...	1505	2.3	--	10.1	7.3	282	0.0	--	--	--	<0.10	<0.015	0.072
FEB
11...	1630	2.8	--	10.1	8.0	365	0.0	--	--	--	<0.10	<0.015	0.058
APR
15...	0810	30	12	9.9	7.2	162	1.1	50	15.7	2.66	0.19	E.010	0.494
JUN
17...	0900	55	1.2	9.1	7.6	62	5.5	32	10.7	1.34	0.12	<0.015	<0.022
AUG
26...	0830	3.1	4.2	7.9	7.9	222	9.3	91	28.8	4.72	0.11	<0.015	0.083

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	0.004	E10
DEC
02...	<0.002	<0.007	E.003	E4
FEB
11...	<0.002	<0.007	<0.004	E1
APR
15...	<0.002	<0.007	0.019	E1
JUN
17...	<0.002	<0.007	0.006	E2
AUG
26...	<0.002	<0.007	0.008	E19
< -- 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...	E10	0.3	E.8	E5	<1	10.3	<0.3	57
APR
15...	40	6.2	9.1	E9	<2	598	<0.3	1,120
JUN
17...	60	0.7	3.9	36	M	33.0	<0.3	141
AUG
26...	50	1.3	2.3	E6	<1	217	<0.3	214
< -- 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)
AUG
26...	0850	860	874.8	4,170	2.1	3.9	<16.400
< -- 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...	1800	0.60	5.5	<0.5	--
APR
15...	0810	30	1.1	13	1.1
JUN
17...	0900	55	5.5	2	0.33
AUG
26...	0830	3.1	9.3	5	0.05
< -- Actual value is known to be less than the value shown.