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2. Culvert - Wikipedia

   en.wikipedia.org/wiki/Culvert

   A culvert is a structure that channels water past an obstacle or to a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material. In the United Kingdom, the word can also be used for a longer artificially buried watercourse. [1]

3. Low-water crossing - Wikipedia

   en.wikipedia.org/wiki/Low-water_crossing

   It consists of an improved surface of gravel, gravel-filled geotextile grid, paving blocks, or concrete slabs positioned to match the slope and elevation of the adjacent waterway and floodplain. To cross somewhat deeper waterways, a type of low water crossing called a vented ford can be constructed with culverts. The size of the culverts (often ...

4. Cured-in-place pipe - Wikipedia

   en.wikipedia.org/wiki/Cured-in-place_pipe

   It is a jointless, seamless pipe lining within an existing pipe. As one of the most widely used rehabilitation methods, CIPP has applications in sewer, water, gas, chemical and district heating pipelines ranging in diameter from 0.1 to 2.8 meters (2–110 inches).

5. List of tunnels in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_tunnels_in_the...

   (four) Chesapeake and Ohio Canal National Historical Park road culverts under the Canal: # 1 (mile 1.3), near Canal Road NW and Foxhall Road NW, NW DC # 2 (mile 3.1), Abner Cloud house (a.k.a. Fletcher's Boat House), Canal Road NW south of Arizona Avenue NW, NW DC (# 3 and # 4 are in Maryland)

6. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

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8. Gravity sewer - Wikipedia

   en.wikipedia.org/wiki/Gravity_sewer

   While some older brickwork sewers remain in use, new sewers of diameters exceeding 1 metre (39 in) typically use reinforced concrete. Corrugated metal pipe may be used for storm drains or wastewaters with similarly low risk of corrosive conditions. [9] Non-circular cross-sections may have advantages for large-diameter sewers. [10]

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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!