The monument sign for Ebright Azimuth, the highest point in Delaware as of September 2016
|Elevation||448 ft (137 m) |
|Prominence||32 ft (9.8 m) |
|Isolation||0.67 miles (1.08 km)|
|Listing||U.S. state high point 49th|
|Location||New Castle County, Delaware, United States|
The Ebright Azimuth is the point with the highest benchmark monument elevation in the U.S. state of Delaware. It is marked with a geodetic benchmark monument and has an elevation of 447.85 feet (136.50 m) above sea level. The only state high-point with a lower elevation is Britton Hill in the state of Florida at 345 feet (105 m) above sea level.
The Ebright Azimuth is located about 6.5 miles (10.5 km) north of downtown Wilmington, Delaware, in far northern New Castle County, within a few feet of the Pennsylvania state line. It is near Concord High School, to the north of Naamans Road, at the middle of the intersection of Ebright Road and Ramblewood Drive. This is an entrance to the Dartmouth Woods development.
"Ebright Azimuth" is not a person's first and last name. James and Grant Ebright owned the property on which the benchmark was placed. An azimuth is an angular measurement in a spherical coordinate system.
Since the schematic photograph was taken the blue and yellow monument sign has been moved across the street closer to the geodetic marker. A curb extension has been installed and the area around the sign has been modestly landscaped.
Radio tower history
The self-supporting radio tower just south of the benchmark was constructed in 1947 by Western Union as part of an historic C-band microwave radio relay system that linked New York City and Washington, D.C. This site was assigned the name "Brandywine" in recognition of Brandywine Creek located several kilometers to the west and was licensed with the call sign KGB29. Western Union's engineers specified a heavy-duty prefabricated fire tower structure, which allowed the microwave transmitters and receivers to be installed inside the cab. "Dish" antennas, mounted behind the window openings, were aimed towards the adjacent relay stations at Mt. Laurel, New Jersey, 33.8 miles (54.4 km) to the northeast, and Elk Neck near Elkton, Maryland, 30.5 miles (49.1 km) to the southwest.
Like most of their early microwave relay sites, Western Union decommissioned the Brandywine installation near Ebright Azimuth as more-reliable broadband fiber systems were developed. The structure now supports several VHF and UHF land mobile radio antennas.
- "Highest Point in Delaware". Delaware Geological Survey. Retrieved 2008-12-17.
- "Regarding the highest point in Delaware". Delaware Repeater Association. Archived from the original on 2009-03-06. Retrieved 2008-12-17.
- "Ebright Azimuth, Delaware". Peakbagger.com. Retrieved 2012-10-17.
- "Ebright". NGS data sheet. U.S. National Geodetic Survey.
- "Radio Stations Operated by the Western Union Telegraph Company" (JPG). Plant and Engineering Department. Western Union Telegraph Company (archived by A Secret Landscape). 1959. Retrieved 2008-12-17.
- "Radio Relay Systems". New York, Washington, Pittsburg. archived by A Secret Landscape. Retrieved 2008-12-11.
|Wikimedia Commons has media related to:|
- "Historic Markers with Google Maps". State of Delaware. Retrieved 2008-12-17.