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  2. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    The blue figure shows an example of results of a computer aided calculation with the amplified drainage equation using the EnDrain program. [11] It shows that incorporation of the incoming energy associated with the recharge leads to a somewhat deeper water table .

  3. Cubic yard - Wikipedia

    en.wikipedia.org/wiki/Cubic_yard

    A cubic yard (symbol yd 3) [1] is an imperial / U.S. customary (non-SI non-metric) unit of volume used in Canada and the United States. It is defined as the volume of a cube with sides of 1 yard (3 feet , 36 inches , 0.9144 meters ) in length .

  4. Neat volume - Wikipedia

    en.wikipedia.org/wiki/Neat_Volume

    In civil engineering and construction, the neat volume is a theoretical amount of material.. For earthworks, it can refer to the volume either before native material is disturbed by excavation, or after placement and compaction is complete.

  5. Vincenty's formulae - Wikipedia

    en.wikipedia.org/wiki/Vincenty's_formulae

    Vincenty's formulae are two related iterative methods used in geodesy to calculate the distance between two points on the surface of a spheroid, developed by Thaddeus Vincenty (1975a). They are based on the assumption that the figure of the Earth is an oblate spheroid, and hence are more accurate than methods that assume a spherical Earth, such ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    [citation needed] In the concrete and petroleum industry, however, a bag of cement is defined as 94 lb (43 kg) because it has an apparent volume close to 1 cubic foot (28 litres). [61] When ready-mix concrete is specified, a "bag mix" unit is used as if the batching company mixes 5 literal bags of cement per cubic yard (or cubic metre) when a ...

  8. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    The placement consisted of 10,251 cubic yards of concrete placed in 58.5 hours using two concrete pumps and two dedicated concrete batch plants. Upon curing, this placement allows the 50,180-square-foot (4,662 m 2 ) cofferdam to be dewatered approximately 26 feet (7.9 m) below sea level to allow the construction of the Inner Harbor Navigation ...

  9. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    The going of a step is measured from the edge of the nosing to the edge of nosing in plan view. A person using the stairs would move this distance forward with each step they take. To avoid confusion, the number of steps in a set of stairs is always the number of risers, not the number of treads.

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