PROVISIONAL DATA SUBJECT TO REVISION

Station operated in cooperatioin with Douglas County.

STATION.--14317450  NORTH UMPQUA RIVER NEAR IDLEYLD PARK, OR.
LOCATION.--Lat 43° 19'29", long 122° 59'55", IN SW 1/4 NE 1/4 sec.12, T.26 S., R.3 W., 
   Douglas County, Hydrologic Unit 17100301, on right bank 0.5 mi upstream from Rock 
   Creek bridge, 2 mi east of Idleyld Park, and at mile 36.3.
DRAINAGE AREA.--886 mi2, at former site 0.5 mi downstream.
PERIOD OF DAILY RECORD.--
  SPECIFIC CONDUCTANCE: January 1998 to current year.
  pH: January 1998 to current year.
  WATER TEMPERATURE: January 1998 to current year.
  DISSOLVED OXYGEN: January 1998 to current year.
  TURBIDITY: October 1999 to current year.
INSTRUMENTATION.--Water-quality monitor and data logger since January 1998.
REMARKS.--Turbidity values are considered relative to this site. The probe was 
   checked using a polymer beads standard.
EXTREMES FOR PERIOD OF RECORD.--
  SPECIFIC CONDUCTANCE: Maximum recorded, 76 microsiemens June 22, 2001; minimum 
    recorded, 26 microsiemens Nov. 21, 1998, but may have been lower during period
    of missing record.
  pH: Maximum, 8.5 units July 25, 2000, Aug. 13, 14, 16, Sept. 5, 2001; minimum 
    recorded, 6.1 units  Dec. 18, 1999, but may have been lower during period of 
    missing record.
  WATER TEMPERATURE: Maximum recorded, 21.0°C Aug. 9, 2001; minimum recorded, 
    2.2°C Nov. 18, 19, 2000.
  DISSOLVED OXYGEN: Maximum recorded, 14.5 mg/L Feb. 10, 1999, but may have 
    been higher during period of missing record; minimum recorded, 6.4 mg/L 
    Aug. 14, 2001.
  TURBIDITY: Maximum recorded, 89 NTU Jan. 10, 2000, but may have been higher during 
    period of missing record; minimum recorded, <1 many days each year.