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A Philadelphia rod is a level staff used in surveying. The rod is used in levelling procedures to determine elevations and is read using a level. A Philadelphia rod consists of two sliding sections graduated in hundredths of a foot. On the front of the rod the graduation increasing from zero at the bottom.
A water level device showing both ends at the same height. A water level (Greek: Aλφαδολάστιχο or (υδροστάθμη) [Alfadolasticho]) is a siphon utilizing two or more parts of the liquid water surface to establish a local horizontal line or plane of reference.
NAVD 88 was established in 1991 by the minimum-constraint adjustment of geodetic leveling observations in Canada, the United States, and Mexico.It held fixed the height of the primary tide gauge benchmark, referenced to the International Great Lakes Datum of 1985 local mean sea level (MSL) height value, at Rimouski, Quebec, Canada.
The Fairmount Water Works was initially constructed between 1812 and 1815 on the east bank of the Schuylkill River.The Water Works initially consisted of a 3 million US gallons (11,000,000 L) earthen reservoir atop Faire Mount at the present site of the Philadelphia Museum of Art, and a pump house with two steam engines to pump water.
The Philadelphia skyline as seen from Boathouse Row in June 2019 (annotated version) The Philadelphia skyline as seen from the Delaware River in February 2023 Philadelphia, the largest city in the U.S. state of Pennsylvania, is home to more than 300 completed high-rise buildings and skyscrapers up to 330 feet (101 m), and 58 completed skyscrapers of 330 feet (101 m) or taller, of which 34 are ...
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Following is a list of dams and reservoirs in Pennsylvania.. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3).
Multiple blocks in Southwest Philadelphia were heavily flooded Wednesday morning after a massive water main break.