Blackbird Creek at Blackbird, DE - 01483200

LOCATION.-- 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. 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 17.10 ft above North American Vertical Datum of 1988 and 17.89 ft above National Geodetic Vertical Datum of 1929. Prior to June 17, 1986, at gage datum 18.89 ft above National Geodetic Vertical Datum of 1929. Mar. 5, 1951 to Oct. 16, 1956, nonrecording gage and crest-stage gage at site 15 ft upstream. Oct. 17, 1956 to June 16, 1986, recording gage at same site on right bank. REMARKS.-- Occasional regulation at low and medium flow by Blackbird Lake Dam, upstream from station.