DOLORES RIVER BASIN

09170800 WEST PARADOX CREEK ABOVE BEDROCK, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°19'54", long 108°53'59", in NE14NW14 sec.18, T.47 N., R.18 W., Montrose County. Site is 1,000 ft downstream from former surface water station, 1.3 mi northwest of Bedrock, and 2.6 mi upstream from mouth.

DRAINAGE AREA.-- 53.3 mi2.

PERIOD OF RECORD.--Chemical analyses: August 1987 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09170800

REMARKS.--Natural flow affected by water imported from Rock Creek through Buckeye Reservoir. Diversion for irrigation of about 2,500 acres.

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

Date	Time	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)	Potas- sium, water, fltrd, mg/L (00935)	Sodium adsorp- tion ratio (00931)	Sodium, water, fltrd, mg/L (00930)	Alka- linity, wat flt fxd end lab, mg/L as CaCO3 (29801)	Chlor- ide, water, fltrd, mg/L (00940)	Fluor- ide, water, fltrd, mg/L (00950)
DEC
12...	0900	8.5	771	0.4	390	84.0	43.1	2.24	0.4	19.3	E164	15.5	0.33
FEB
13...	0800	8.4	996	3.8	510	105	59.7	2.62	0.5	26.7	235	25.1	0.35
APR
02...	0800	8.3	1,010	7.6	540	114	61.9	3.00	0.6	29.5	214	23.9	0.34
23...	0845	8.5	1,100	5.7	590	122	69.7	3.19	0.6	33.1	251	26.6	0.38
MAY
28...	0800	8.1	925	14.7	450	94.8	52.0	3.58	0.5	23.9	229	20.1	0.4
JUN
19...	0815	8.1	783	16.2	410	83.5	47.8	3.57	0.5	21.9	206	15.0	0.3
JUL
09...	0730	8.0	732	13.7	340	75.2	36.5	7.41	0.4	16.6	198	13.8	0.3
AUG
21...	0930	8.2	828	22.0	410	89.1	45.6	12.4	0.4	19.7	231	19.3	0.3

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

Date	Silica, water, fltrd, mg/L (00955)	Sulfate water, fltrd, mg/L (00945)	Residue water, fltrd, sum of consti- tuents mg/L (70301)	Residue water, fltrd, tons/ acre-ft (70303)
DEC
12...	10.6	198	--	--
FEB
13...	11.6	295	668	0.91
APR
02...	10.6	310	682	0.93
23...	9.7	349	765	1.04
MAY
28...	8.7	255	596	0.81
JUN
19...	7.0	194	496	0.68
JUL
09...	11.0	168	448	0.61
AUG
21...	11.9	187	524	0.71
E -- Estimated laboratory analysis value.