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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.
The water level at each end of the tube will be at the same elevation, whether the two ends are adjacent or far apart, so a line between them will be horizontal at its midpoint and a shed base, building foundation or similar structure laid out using several such lines will be "horizontal" within building tolerances on any scale over which use ...
Helene, the strongest hurricane on record to slam into Florida’s Big Bend region, is now a post-tropical cyclone with winds of 35 mph, leaving at least 59 people dead in five states, leveling ...
Multiple blocks in Southwest Philadelphia were heavily flooded Wednesday morning after a massive water main break.
HABS—Historic American Buildings Survey projects in Philadelphia. Pages in category "Historic American Buildings Survey in Philadelphia" The following 197 pages are in this category, out of 197 total.
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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.
And before that, a 5.8-magnitude quake shook central Virginia in 2011, and was felt across much of the East Coast, forcing hundreds of thousands people to evacuate buildings in New York ...