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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01483165 SPRING MILL BRANCH NEAR ARMSTRONG, DE
LOCATION - Lat 39°29'05.4", long 75°41'46.8" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205, on left bank just downstream from bridge on Cedar Lane (Road No. 427), 0.7 mi upstream from Shallcross Lake, and 1.2 mi northeast of Armstrong.
DRAINAGE AREA - 1.79 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Occasional low-flow measurements, water years, 1978-1980. October 2000 to September 2004, April 2012 to June 2014 (Discontinued). Prior to 2001, published as Drawyer Creek Tributary near Armstrong.
GAGE - Water-stage recorder. Datum of gage is 13.70 ft above North American Vertical Datum of 1988.
REMARKS - For 2014 Water Year, records fair except those above 130 ft³/s, and for those for estimated daily discharges, which are poor. U.S. Geological Survey satellite data-collection platform at station.
