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2. Manhole cover - Wikipedia

   en.wikipedia.org/wiki/Manhole_cover

   Manhole covers may also be made from glass-reinforced plastic or other composite material (especially in Europe, or where cover theft is of concern). Because of law restricting acceptable manual handling weights, Europe has seen a move towards lighter weight composite manhole cover materials, which also have the benefits of greater slip ...

3. ISO 15398 - Wikipedia

   en.wikipedia.org/wiki/ISO_15398

   The constraint "non-traffic areas" is also the crucial difference to the general European Standard for manhole covers EN124, which is only for vehicular access areas. Plastic-manhole covers according to ISO 15398 are designated for the commitment on control- and inspection chambers in pedestrian (class A 15) and light vehicular areas (max ...

4. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   Sanitary manhole. 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 gas. [4]

5. Manhole - Wikipedia

   en.wikipedia.org/wiki/Manhole

   Manhole. 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. Manholes are often used as an access point for an underground public utility, allowing inspection, maintenance, and system upgrades. The majority of underground services have manholes ...

6. List of New York City manhole cover abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_New_York_City...

   FDNY = FDNY. GAS = Brooklyn Union Gas. HPFS = High Pressure Fire Service. IRT = Interborough Rapid Transit. JWS = Jamaica Water Supply Company of New York. KCEL&PC = Kings County Electric Light and Power Company. KCR Co. = Kings County Refrigerating Co. [Gansevoort Market area] LIC = Long Island City. LIRR = Long Island Rail Road.

7. Sanitary sewer overflow - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer_overflow

   A manhole cover unable to contain a sanitary sewer overflow. Sanitary sewer overflow (SSO) is a condition in which untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. When caused by rainfall it is also known as wet weather overflow. Causes of sanitary sewer overflows include ...