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Bulkhead |
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A one-piece fabricated steel unit which is lowered into guides and seals against a frame to close a water passage in a dam, conduit, spillway, etc. An object used to isolate a portion of a waterway for examination, maintenance, or repair. A wall or partition erected to resist ground or water pressure. |
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Bulking |
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The increase in volume of a material due to manipulation. Rock bulks upon being excavated; damp sand bulks if loosely deposited, as by dumping, because the apparent cohesion" prevents movement of the soil particles to form a reduced volume." |
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Butt joint |
Open joint |
In pipe, flat ends that meet but do not overlap. |
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Butterfly valve |
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A valve designed for quick closure that consists of a circular leaf, slightly convex in form, mounted on a transverse shaft carried by two bearings. |
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Buttress dam |
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A dam consisting of a watertight upstream part supported at intervals on the downstream side by a series of buttresses (walls normal to the axis of the dam). Buttress dams can take many forms. See arch-buttress dam, flat slab or slab and buttress dam, massive head buttress dam, multiple arch dam, and solid head buttress dam. |
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By (Kilometers or Miles) |
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Select the units (kilometers or miles) for the radial distance. |
