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Water-Year Summary for Site 021720709

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Available Parameters
00010 Temperature, water(Max.,Min.,Mean) [Bottom]  
00010 Temperature, water(Max.,Min.,Mean) [Middle]  
00065 Gage height(Max.,Min.,Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean) [Bottom]  
00095 Specific cond at 25C(Min.,Mean,Max.) [Middle]  
00300 Dissolved oxygen(Max.,Min.,Mean) [Bottom]  
00300 Dissolved oxygen(Max.,Min.,Mean) [Middle]  

Water year 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
021720709 COOPER RIVER AT U.S. HIGHWAY 17 AT CHARLESTON, SC
LOCATION - Lat 32°48'08", long 79°54'37" referenced to North American Datum of 1927, Charleston County, SC, Hydrologic Unit 03050201, on first pier east of east bridge tower under U.S. Highway 17 Arthur Ravenel bridge and at river mile 1.4.
DRAINAGE AREA -  
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1997 to August 2005, February 2007 to current year.
GAGE - Data collection platform. Elevation of gage is 5 ft below NGVD of 1929 (from topographic map). Prior to February 9, 2007 at site 100 ft downstream at same datum. A datum correction of -6.415 was determined by levels obtained on 3/11/13 to convert GH to NAVD88 at the current gaging location. .
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 12.94 ft, Sept. 11, 2017; minimum gage height, 0.30 ft, Feb. 20, 2000. Gage height affected by tide.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1997 to current year.
PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE (Top): April 2004 to May 2005, (Discontinued).
SPECIFIC CONDUCTANCE (Middle): April 1997 to August 2005, December 2006 to June 2009, September 2009 to current year.
SPECIFIC CONDUCTANCE (Bottom): April 2004 to May 2005, May 2016 to current year. 
WATER TEMPERATURE (Top): April 2004 to May 2005,  (Discontinued). 
WATER TEMPERATURE (Middle): April 1997 to August 2005, December 2006 to June 2009, September 2009 to current year.
WATER TEMPERATURE (Bottom): April 2004 to May 2005, May 2016 to current year.
DISSOLVED OXYGEN (Top): April 2004 to May 2005,  (Discontinued).
DISSOLVED OXYGEN (Middle): April 1997 to August 2005, December 2006 to June 2009, September 2009 to current year.
DISSOLVED OXYGEN (Bottom): May 2016 to current year.

INSTRUMENTATION - Water-quality multiprobe and data collection platform.
REMARKS -

Sensor location"Top" is set to 3.0 ft below the water surface at all tide phases. Sensor location "Middle" is static and set at gage height= -6.00 ft. Sensor location "Bottom" is static and set at gage height = -10.00 ft.

For the 2014 water year, specific conductance records rated good except for Oct. 4-8, Sep. 11-13, which are fair, and Sep. 14, 15, Oct. 9-22, which are poor.
For the 2014 water year, temperature records rated excellent. 
For the 2014 water year, dissolved oxygen records rated excellent except for Nov. 7-21, May 21-29, Sep. 5-14, which are good, and July 2-9, which are fair.
For the 2015 water year, specific conductance records rated excellent except for Mar. 20-27, Apr. 9-27, Jun. 5-19, and Sep. 1-24 which are rated good.
For the 2015 water year, temperature records rated excellent.
For the 2015 water year, dissolved oxygen records rated good except for Sep. 15-25, which are rated poor.
For the 2016 water year, specific conductance records rated good except for Jun. 29 - Jul. 11 and Aug. 9-18 which are rated fair, and Jan. 6 - Mar. 18 and 
Jun. 2-19 which are rated poor.
For the 2016 water year, temperature records rated excellent.
For the 2016 water year, dissolved oxygen records rated good except for Sep. 6-19, which are rated fair and Jul. 28 - Aug. 9 which are rated poor.

Prior to October 3, 2003 dissolved oxygen concentrations are not corrected for salinity.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE (Top): Maximum, 50,000 microsiemens, June 04, Aug. 3, 2004; Minimum, 22,900 microsiemens, Mar. 29, 2005.

WATER TEMPERATURE (Top): Maximum, 30.9°C, July 9, 2004; Minimum, 7.4°C, Jan. 31, 2005.

DISSOLVED OXYGEN (Top): Maximum, 11.2 mg/L, Feb. 15, 2005; Minimum, 2.3 mg/L, July 20, 2004.

SPECIFIC CONDUCTANCE (Middle): Maximum, 52,700 microsiemens/cm, Nov. 15, 2001, May 7, 2012; minimum, 8,460 microsiemens/cm, Oct. 5, 2015.

WATER TEMPERATURE (Middle): Maximum, 31.8°C, July 26, 2010; minimum, 5.0°C, Jan. 8, 2018.

DISSOLVED OXYGEN (Middle): Maximum, 11.4 mg/L, Jan 25. 2018; minimum, 3.1 mg/L, Jun. 28, 2018.

SPECIFIC CONDUCTANCE (Bottom): Maximum, 55,100 microsiemens/cm, Jan. 31, 2018; minimum, 16,200 microsiemens/cm, Oct. 9, 2016. 

WATER TEMPERATURE (Bottom): Maximum, 31.7°C, Aug. 15, 2016, and Aug. 18, 2016; minimum, 4.9°C, Jan. 08, 2018. 

DISSOLVED OXYGEN (Bottom): Maximum, 11.3 mg/L, Jan. 25, 2018; minimum, 2.7 mg/L, Jul. 11, 2017