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A round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.
Pavement and water drops from 25 feet gave 286 g and 115 g, respectively, while 50 ft (15 m) drops maxed out the instrument (pavement) and registered 220 g (water). For a final test at terminal velocity , roughly 120 miles per hour, Tory threw two pig carcasses out of a helicopter at 600 ft (183 m), after which they were X-rayed to determine ...
Shortly before 5:30 a.m., a manhole cover lifted off from its launching pad on Hill Street in Old Louisville and blasted through Pam Smith's roof, decking a coffee table in the process.
The manhole cover business has turned over the years, from the sort of ornate covers that a business like Berry’s Foundry might have crafted to drabber covers that dot Sacramento’s streets today.
The new sewer system featured innovations such as manhole covers, which eased access to and cleaning of the sewers. However, sewage still flowed into the lake and polluted the city's drinking water. In 1863, work began on a two-mile Chicago lake tunnel , sixty feet under the lake, out to a new intake crib . that would draw cleaner water farther ...
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[2] [7] [14] Manhole covers shot up into the sky and came crashing down with great destructive force. [14] [15] [16] One manhole cover crashed completely through the ceiling and floor of a third-floor apartment on Second Street, and another narrowly missed a child when it landed in a house at the corner of 9th and Hill streets. [15]
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