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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 ...
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.
Unofficial map of the neighborhoods of Philadelphia Philadelphia Planning Analysis sections. The following is a list of neighborhoods, districts and other places located in the city of Philadelphia, Pennsylvania, United States. The list is organized by broad geographical sections within the city.
The reference water levels are used on inland waterways to define a range of water levels allowing the full use of the waterway for navigation. [1] Ship passage can be limited by the water levels that are too low, when the fairway might become too shallow for large ("target", "design") ships, or too high, when it might become impossible for the target ships to pass under the bridges. [1]
This is a list of the National Register of Historic Places listings in Philadelphia, Pennsylvania. There are more than 600 properties and districts listed on the National Register in Philadelphia, including 67 National Historic Landmarks. This National Park Service list is complete through NPS recent listings posted February 14, 2025.
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 ).
Also in the district are eleven 2 + 1 ⁄ 2-story brick rowhouses, with the earliest dated to the 1830s. Notable buildings include the Rebman Building (1903), Stewart Cracker Building (c. 1900), U.S. Tire Company Building (1911), Lasher Building (1927), Philadelphia City Morgue (1928), and Overland Motor Company Building (1910, c. 1940).