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During cold weather, ice effects on stage, groundwater levels, precipitation and water quality parameters at some stream-gaging stations and wells are likely. Data values reported on these pages may be significantly higher or lower than actual values. Adjustment of data for ice effects can only be done after detailed analysis. Users are encouraged to contact this office for more information on specific stream-gaging stations or wells.
LOCATION.--Lat 39°21'58.6", long 75°40'09.8", New Castle County, Hydrologic Unit 02040205, on left bank 15 ft downstream from highway culverts, 0.5 mi upstream from Barlow Branch, 0.6 mi southwest of Blackbird, 5.6 mi northwest of Smyrna, and 13.8 mi upstream from mouth. DRAINAGE AREA.--4.06 mi2. PERIOD OF RECORD.--Annual maximum, water years 1952-56, and occasional low-flow measurements, water years 1952-53, 1955-56. October 1956 to current year. GAGE.--Water-stage recorder. Concrete control since May 23, 1968. Datum of gage is 17.11 ft above North American Vertical Datum of 1988. Mar. 5, 1951, to Oct. 16, 1956, nonrecording gage and crest-stage gage at site 15 ft upstream at gage datum 1.0 ft higher. Oct. 17, 1956, to June 16, 1986, recording gage at same site on right bank at gage datum 1.0 ft higher. REMARKS.--Occasional regulation at low and medium flow by Blackbird Lake Dam upstream from station. U.S. Geological Survey satellite data-collection platform at station. COOPERATION.--Funding for this station is provided by the Delaware Geological Survey, and the U.S. Geological Survey
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