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  2. Stoplogs - Wikipedia

    en.wikipedia.org/wiki/Stoplogs

    Stoplogs are frequently used to temporarily block flow through a spillway or canal during routine maintenance. At other times stoplogs can be used over longer periods of times, such as when a field is flooded and stoplogs are being used in smaller gates in order to control the depth of water in fields.

  3. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Prior to the advent of computer-aided design (CAD) in the late 1980s, P&IDs were drawn by hand. The drawing template shown below, actual size 225.mm by 111 mm, is typical of those used to draw P&IDs. Piping and instrumentation diagram manual drawing template (1980s). Symbol key:

  4. Sanitary manhole - Wikipedia

    en.wikipedia.org/wiki/Sanitary_manhole

    A sanitary manhole under construction. A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage ...

  5. Sewerage - Wikipedia

    en.wikipedia.org/wiki/Sewerage

    It encompasses components such as receiving drains, manholes, pumping stations, storm overflows, and screening chambers of the combined sewer or sanitary sewer. Sewerage ends at the entry to a sewage treatment plant or at the point of discharge into the environment. It is the system of pipes, chambers, manholes or inspection chamber, etc. that ...

  6. Parshall flume - Wikipedia

    en.wikipedia.org/wiki/Parshall_flume

    For free flow, the equation to determine the flow rate is simply Q = CH a n where: Q is flowing rate (ft 3 /s) C is the free-flow coefficient for the flume (see Table 1 below) H a is the head at the primary point of measurement (ft) (See Figure 1 above) n varies with flume size (see Table 1 below) Parshall flume discharge table for free flow ...

  7. ISO 13567 - Wikipedia

    en.wikipedia.org/wiki/ISO_13567

    Technical product documentation — Organization and naming of layers for CAD — Part 1: Overview and principles ISO 13567-2:2017 [2] Technical product documentation — Organization and naming of layers for CAD — Part 2: Concepts, format and codes used in construction documentation ISO/TR 13567-3:1999 (withdrawn September 2015) [3]

  8. Manhole - Wikipedia

    en.wikipedia.org/wiki/Manhole

    PMG manholes in a city street, Perth, Western Australia Manhole being used to access sewer Installation of a fiber-optic manhole in Brooklyn, New York An uncovered manhole in Beirut, Lebanon. A manhole (utility hole, maintenance hole, [1] or sewer hole) is an opening to a confined space such as a shaft, utility vault, or large vessel.

  9. Packaged metering manhole - Wikipedia

    en.wikipedia.org/wiki/Packaged_Metering_Manhole

    In order to form a watertight unit, a packaged metering manhole is provided with a solid fiberglass base at the bottom of the manhole barrel. The base can serve not only as the bottom of the manhole, but also as a means of anchoring the manhole to a concrete slab (required to counteract the buoyant forces on the manhole).