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  2. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    A linear drain A Channel Drain. There are four common types of trench drains which are based on forming or installation method. These are cast-in-place, pre-cast concrete, liner systems and former systems. Newer stainless steel drains are available for residential and commercial shower installs and more commonly called "channel drains".

  3. Two-stage drainage ditch - Wikipedia

    en.wikipedia.org/wiki/Two-stage_drainage_ditch

    "Over a mile long reach [of the water channel] adds up to over 1.5 acre of land needed for the two stage drainage ditch design". This acreage of land may already be currently used for other purposes or contains infrastructure and subsurface gas or sewer lines. Thus, the larger the channel is, the more soil, and thus, increased funds required to ...

  4. Interceptor ditch - Wikipedia

    en.wikipedia.org/wiki/Interceptor_ditch

    In geotechnical engineering, an interceptor ditch is a small ditch or channel constructed to intercept and drain water to an area where it can be safely discharged. [1] These are used for excavation purposes of limited depth made in a coarse-grained soils. These are constructed around an area to be dewatered.

  5. Culvert - Wikipedia

    en.wikipedia.org/wiki/Culvert

    A minimum energy loss culvert or waterway is a structure designed with the concept of minimum head loss. The flow in the approach channel is contracted through a streamlined inlet into the barrel where the channel width is minimum, and then it is expanded in a streamlined outlet before being finally released into the downstream natural channel.

  6. Permeable paving - Wikipedia

    en.wikipedia.org/wiki/Permeable_paving

    Permeable pavement surfaces may be composed of; pervious concrete, porous asphalt, paving stones, or interlocking pavers. [1] Unlike traditional impervious paving materials such as concrete and asphalt, permeable paving systems allow stormwater to percolate and infiltrate through the pavement and into the aggregate layers and/or soil below. In ...

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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!

  8. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    the permissible long term average depth of the water table (Dw) on the basis of agricultural drainage criteria; the soil's hydraulic conductivity (Ka and Kb) by measurements; the depth of the bottom of the aquifer (Di) the design drain spacing (L) can be found from the equation in dependence of the drain depth (Dd) and drain radius (r ...

  9. Nation's largest labor union for federal employees rebukes ...

    www.aol.com/nations-largest-labor-union-federal...

    The American Federation of Government Employees (AFGE), the country's largest labor union for federal employees, is fighting back against GOP criticisms that government employees are abusing the ...

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