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The culverts built for the Southern and Western railway lines were built to standard designs approved by Fitzgibbon in 1863. They were of masonry or timber construction; concrete was not used for culverts in Queensland until the 1880s. The North Ipswich culvert was built to the standard design for 4 feet (1.2 m) wide brick culverts.
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The culvert type and shape selection is based on a number of factors including requirements for hydraulic performance, limitations on upstream water surface elevation, and roadway embankment height. [2] The process of removing culverts to restore an open-air watercourse is known as daylighting. In the UK, the practice is also known as deculverting.
The culvert measures approximately 2 metres (6 ft 7 in) in width and 2.5 metres (8 ft 2 in) in height. The length of the culvert from the southeastern entrance to the remains of the northwestern end is 16 metres (52 ft). [1] The base and lower half of the culvert is constructed of poor quality grayish sandstone to a height of approximately 1 ...
The span is also an emergency route. Vehicles and pedestrians can use it if a disaster damages the state Route 410 bridge, a news release said.
The size of the culverts (often concrete pipes) is usually selected to allow the water to flow below the roadway and provide a dry crossing surface for most of the year. During periods of high water flow (e.g. spring runoff or flash floods), water will flow over the top of the crossing, as the culverts are not large enough to carry these flood ...
It works in three ways. First, the perimeter of the trapezoidal fence is typically 40–50 feet (12–15 m) long, making it difficult for a beaver to dam the entire fence. Second, as beavers try to dam the culvert, the fence forces them to dam in a direction away from the culvert, which is not in their nature.
Two foot and 600 mm gauge railways are narrow gauge railways with track gauges of 2 ft (610 mm) and 600 mm (1 ft 11 + 5 ⁄ 8 in), respectively. Railways with similar, less common track gauges, such as 1 ft 11 + 3 ⁄ 4 in ( 603 mm ) and 1 ft 11 + 1 ⁄ 2 in ( 597 mm ), are grouped with 2 ft and 600 mm gauge railways.