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  2. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    Concrete will need to be poured to surround the trench drain so that the load can be transferred from the channel and grate to the surrounding areas. Pre-cast trench drains generally come in 4-inch (100 mm) widths but can range anywhere from a 1.75-inch (44 mm) slot to 2-inch (51 mm) wide channels with grates, and up to any size imaginable ...

  3. French drain - Wikipedia

    en.wikipedia.org/wiki/French_drain

    A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.

  4. This Drain Mistake Could Be Costly - AOL

    www.aol.com/drain-mistake-could-costly-205600754...

    A French drain is a trench that diverts water away from an area where it's pooling to a lower elevation where it can be released, explains Mike Arnold, director of The Gardens at Texas A&M ...

  5. Slot drain - Wikipedia

    en.wikipedia.org/wiki/Slot_drain

    In recent years, this drainage concept is more often used in both indoor and outdoor applications, such as fire stations, car washes, landscaping, shower rooms and garages, as well as highly-sanitized environments like food processing plants and breweries. [1] A slot drain is a modified trench drain. "Slot" describes its appearance on the ground.

  6. Tile drainage - Wikipedia

    en.wikipedia.org/wiki/Tile_drainage

    Johnston, the "father of tile drainage in America", [12] continued to advocate for tile drainage throughout his life, attributing his agricultural success to the formula "D, C, and D", i. e., dung, credit, and drainage. [13] The expansion of drainage systems was an important technical aspect of Westward Expansion in the United States in the ...

  7. Drainage - Wikipedia

    en.wikipedia.org/wiki/Drainage

    Subsurface drains, on the other hand, are designed to manage water that seeps into the soil beneath the planting surface. French drains, which are gravel-filled trenches with perforated pipes at the bottom, are the most common type of subsurface drain. Trench drains, which are similar but shallower and wider, are also used in some situations. [4]

  8. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    Invert level affects flow from drainage pipes. In civil engineering, the invert level is the base interior level of a pipe, trench or tunnel; it can be considered the "floor" level. [1] The invert is an important datum for determining the functioning or flowline of a piping system.

  9. How Democrats Are Faring In First Tests Of The Trump Backlash

    data.huffingtonpost.com/2017/special-elections

    Political analysts have wondered whether Democrats can turn this wave of progressive enthusiasm into concrete electoral gains in the 2018 midterms. One way to test that: special elections to fill empty state legislature and congressional seats.

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