GUNNISON RIVER BASIN

09119000 TOMICHI CREEK AT GUNNISON, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD--October 1990 to September 1993, 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=09119000

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...	0920	32	2.8	10.0	8.2	361	4.0	180	53.0	12.5	0.22	<0.015	E.018
DEC
05...	1140	54	--	10.8	8.4	290	0.0	--	--	--	0.18	<0.015	E.019
FEB
13...	1120	44	--	10.7	8.1	265	2.2	--	--	--	0.15	<0.015	E.013
APR
17...	1130	72	E8.3	9.4	8.1	253	9.3	120	33.1	8.32	0.33	<0.015	<0.022
JUN
19...	1220	153	1.2	9.2	8.0	378	16.5	190	52.4	13.3	0.53	<0.015	<0.022
AUG
28...	1340	71	3.1	11.3	8.7	279	18.5	140	40.1	10.8	0.27	<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)	BOD, water, unfltrd 5 day, 20 degC mg/L (00310)	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
17...	E.002	E.004	0.019	<2.0	97
DEC
05...	<0.002	0.008	0.032	<2.0	E5
FEB
13...	<0.002	E.006	0.024	<2.0	<1
APR
17...	<0.002	0.022	0.074	<2.0	E1
JUN
19...	<0.002	0.010	0.042	<2.0	79
AUG
28...	<0.002	0.013	0.041	<2.0	E42
< -- 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	34	<1	21.7	<0.3	<24
APR
17...	<20	<0.2	E.7	104	<1	87.3	<0.3	<24
JUN
19...	<2	<0.2	1.8	43	<1	63.5	<0.3	4
AUG
28...	2	<0.2	<1.2	20	<1	19.0	<0.3	E2
< -- 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
28...	1335	1,800	1,838	38,000	0.7	1.1	43.0

MISCELLANEOUS FIELD MEASUREMENTS, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)		Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)
OCT						MAY
03...	1033	36	358	9.5		02...	1520	11	389	13.6
NOV						29...	1313	501	298	18.0
14...	1010	69	345	1.0		SEP
APR						04...	1404	66	297	19.2
01...	1730	93	272	9.5

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...	0920	32	4.0	2	0.17
APR
17...	1130	72	9.3	11	2.1
JUN
19...	1220	153	16.5	3	1.2
AUG
28...	1340	71	18.5	4	0.73