385408106543600 EAST RIVER ABOVE CRESTED BUTTE, CO.

GUNNISON RIVER BASIN

385408106543600 EAST RIVER ABOVE CRESTED BUTTE, CO.

WATER-QUALITY RECORDS

LOCATION.--Lat 38°52'51", long 106°54'30", Gunnison County, Hydrologic Unit 14020001, approximately 200 ft upstream from confluence with Brush Creek, and 4.2 mi northeast of Crested Butte.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD--August 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=385408106543600

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)

E coli,
m-TEC
MF,
water,
col/
100 mL
(31633)

OCT

22...

1130

14

9.3

8.2

301

3.5

<0.10

<0.015

<0.022

<0.002

<0.007

0.004

E2

DEC

03...

0940

9.6

9.5

7.8

333

0.5

E.06

<0.015

0.055

<0.002

<0.007

0.006

E3

FEB

11...

1030

7.2

10.1

8.0

334

0.3

<0.10

<0.015

0.058

<0.002

<0.007

E.002

E2

APR

16...

0930

43

10.4

8.1

311

0.9

0.22

<0.015

0.198

<0.002

<0.007

0.025

<1

JUN

17...

1800

158

8.0

8.0

197

11.0

0.10

<0.015

0.097

<0.002

<0.007

0.034

60

AUG

26...

1300

25

7.6

8.3

282

15.3

0.10

<0.015

0.032

<0.002

<0.007

0.004

E43

< -- 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...

1305

1,800

1,867

1,460

33

55.8

81.2

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)	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
22...	1130	14	9.3	8.2	301	3.5	<0.10	<0.015	<0.022	<0.002	<0.007	0.004	E2
DEC
03...	0940	9.6	9.5	7.8	333	0.5	E.06	<0.015	0.055	<0.002	<0.007	0.006	E3
FEB
11...	1030	7.2	10.1	8.0	334	0.3	<0.10	<0.015	0.058	<0.002	<0.007	E.002	E2
APR
16...	0930	43	10.4	8.1	311	0.9	0.22	<0.015	0.198	<0.002	<0.007	0.025	<1
JUN
17...	1800	158	8.0	8.0	197	11.0	0.10	<0.015	0.097	<0.002	<0.007	0.034	60
AUG
26...	1300	25	7.6	8.3	282	15.3	0.10	<0.015	0.032	<0.002	<0.007	0.004	E43
< -- 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...	1305	1,800	1,867	1,460	33	55.8	81.2

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U.S. Geological Survey
Water Resources of Colorado
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Last Modified: April 29, 2004