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  2. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    A pipe laser, or another vertical distance measuring device is most commonly used for this. Invert levels are important for the drainage of a non-pressured fluid pipe. Typically, a good design requires that the invert level of the pipe will be lower (or at least not higher) for each section of pipe before it reaches its final destination. [5]

  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. Philippine Trench - Wikipedia

    en.wikipedia.org/wiki/Philippine_Trench

    The Philippine Trench (also called the Philippine Deep, Mindanao Trench, and the Mindanao Deep) is a submarine trench to the east of the Philippines. The trench is located in the Philippine sea of the western North Pacific Ocean and continues NNW-SSE. [1] It has a length of approximately 1,320 kilometres (820 miles) and a width of about 30 km ...

  5. East Luzon Trough - Wikipedia

    en.wikipedia.org/wiki/East_Luzon_Trough

    The trench is located near the Philippine orogeny and located in the southeastern region of the Philippine Sea Plate. The depth of the trough is 5,700 meters. The East Luzon Trough formed during the Eocene and Oligocene epoch, 40–24 million years ago. [1] [2] [3] Immediately to the South of the East Luzon Trough is the Philippine Trench.

  6. Utility tunnel - Wikipedia

    en.wikipedia.org/wiki/Utility_tunnel

    A utility tunnel, utility corridor, or utilidor is a passage built underground or above ground to carry utility lines such as electricity, steam, water supply pipes, and sewer pipes. Communications utilities like fiber optics , cable television , and telephone cables are also sometimes carried.

  7. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    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 through custom trench drain divisions.

  8. File:Philippine plate tectonics, volcanoes, and trenches.png

    en.wikipedia.org/wiki/File:Philippine_plate...

    Northwestard subduction of the Philippine Sea Plate (PSP) beneath the Philippine Mobile Belt (PMB) along the East Luzon Trough (ELT) and Philippine Trenceh (PT); 2. Southeastward subduction of Sundaland Plate (SP) beneath the PMB along Manila (MT), Negros (NT), Sulu (ST), and Cotabato (CT) trenches.

  9. Manila Trench - Wikipedia

    en.wikipedia.org/wiki/Manila_Trench

    The Manila Trench near western Luzon and Mindoro, the Philippine Trench in the east, and the Philippine Mobile Belt. The Manila Trench is an oceanic trench in the Pacific Ocean, located west of the islands of Luzon and Mindoro in the Philippines. The trench reaches a depth of about 5,400 metres (17,700 ft), [8] in contrast with the average ...