Search results
Results From The WOW.Com Content Network
These uncontrolled spillways are also called morning glory (after the flower), or glory hole spillways. [12] [13] In areas where the surface of the reservoir may freeze, this type of spillway is normally fitted with ice-breaking arrangements to prevent the spillway from becoming ice-bound. Some bell-mouth spillways are gate-controlled.
A shaft equipped with ladder rungs for personnel access. In civil engineering a shaft is an underground vertical or inclined passageway. Shafts are often entered through a manhole and closed by a manhole cover. They are constructed for a number of reasons including: For the construction of a tunnel
Open channel spillways are dam spillways that utilize the principles of open-channel flow to convey impounded water in order to prevent dam failure. They can function as principal spillways, emergency spillways, or both. They can be located on the dam itself or on a natural grade in the vicinity of the dam.
Figure 4: An undular front on a tidal bore. At this point the water is relatively deep and the fractional change in elevation is small. A tidal bore is a hydraulic jump which occurs when the incoming tide forms a wave (or waves) of water that travel up a river or narrow bay against the direction of the current. [16]
Although the early stepped spillways were built in cut-stone masonry, unlined rock, and timber, a wider range of construction materials was introduced during the mid-19th century, including the first concrete stepped spillway of the Gold Creek dam (1890) in Brisbane, Australia. During the first half of the 20th century, the stepped cascade ...
“Full work on the Utility Shaft will resume only after any necessary corrective actions have been implemented.” The Waste Isolation Pilot Plant is pictured on Thursday, Oct. 5, 2023, in ...
These shafts are typically placed at regular intervals along the tunnel to ensure that airflow reaches all parts of the mine. This distribution of airflow is essential for diluting hazardous gases , such as methane and carbon monoxide , which can accumulate in confined spaces and pose serious risks of explosion or poisoning.
"I was instructed by my — my attorneys to do so, because if I didn't, it felt like I was, you know, guilty of something, trying to hide something, which I wasn't," Renard says.