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Message: <blockquote data-quote="Aktamge" data-source="post: 8764711" data-attributes="member: 312646"><img src="http://img818.imageshack.us/img818/500/morninggloryplugholespi.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />At first glance you might mistake a bell-mouth spillway for a watery  vortex into another dimension. What can only be described as a giant  hole in the water is actually a method for controlling the release of  flows from a dam or levee into a downstream area. These spillways help  prevent floods from ‘dam’-aging or destroying a dam.<img src="http://img209.imageshack.us/img209/3687/elephantbaby.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img543.imageshack.us/img543/7379/gloryholeinwaterladybow.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />SPILLWAYS - A spillway is a structure used to provide for the controlled  release of flows from a dam or levee into a downstream area, typically  being the river that was dammed- Spillways release floods so that the water does not overtop and damage  or even destroy the dam. Except during flood periods, water does not  normally flow over a spillway- In contrast, an intake is a structure used to release water on a regular basis for water supply, hydroelectricity generation, etc.- Floodgates and fuse plugs may be designed into spillways to regulate water flow and dam height- Other uses of the term “spillway” include bypasses of dams or outlets  of a channels used during highwater, and outlet channels carved through  natural dams such as moraines Source: <a href="http://en.wikipedia.org/wiki/Spillway" target="_blank">http://en.wikipedia.org/wiki/Spillway</a> <img src="http://twistedsifter.com/wp-content/uploads/2010/05/giant-dam-spillway-ladybower-resevoir.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />BELL-MOUTH SPILLWAYS - Some spillways are designed like an inverted bell so that water can  enter all around the perimeter. These uncontrolled spillway devices are  also called: morning glory, plughole, glory hole, or bell-mouth spillways- In areas where the surface of the reservoir may freeze, bell-mouth  spillways are normally fitted with ice-breaking arrangements to prevent  the spillway from becoming ice-bound Source: <a href="http://en.wikipedia.org/wiki/Spillway" target="_blank">Wikipedia</a><a href="http://en.wikipedia.org/wiki/Spillway" target="_blank"><img src="http://img251.imageshack.us/img251/9207/gloryholespillway.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a><img src="http://img193.imageshack.us/img193/3566/holeinthewaterladybower.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />LADYBOWER RESEVOIR - The images above are from the spillways located at the Ladybower Resevoir- The Ladybower Reservoir is a large Y-shaped reservoir, the lowest of three in the Upper Derwent Valley in Derbyshire, England- The River Ashop flows into the reservoir from the west; the River  Derwent flows south, initially through Howden Reservoir, then Derwent  Reservoir, and finally through Ladybower Reservoir- Its longest dimension is just over 3 miles (5km), and at the time of  construction it was the largest reservoir in Britain (1943) Source: <a href="http://en.wikipedia.org/wiki/Ladybower_Reservoir" target="_blank">Wikipedia</a><img src="http://img69.imageshack.us/img69/1848/giantplugholemonticello.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><a href="http://en.wikipedia.org/wiki/Ladybower_Reservoir" target="_blank"><img src="http://img12.imageshack.us/img12/852/monticellodamaerial.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a><a href="http://en.wikipedia.org/wiki/Ladybower_Reservoir" target="_blank"></a>MONTICELLO DAM - The Monticello Dam is a dam in Napa County, California, United States constructed between 1953 and 1957- It is a medium concrete-arch dam with a structural height of 304 ft (93 m) and a crest length of 1,023 ft (312 m)- It contains 326,000 cubic yards (249,000 m³) of concrete. The dam  impounded Putah Creek to cover the former town of Monticello and flood  Berryessa Valley to create Lake Berryessa, the second-largest lake in  California- The capacity of the reservoir is 1,602,000 acre•ft (1,976,000 dam³).  Water from the reservoir is supplied mostly to the North Bay area of San  Francisco- The dam is noted for its classic, uncontrolled spillway with a rate of  48,400 cubic feet per second (1370 m³/s) and a diameter at the lip of  72 ft (22 m). Source: <a href="http://en.wikipedia.org/wiki/Monticello_Dam" target="_blank">Wikipedia</a><img src="http://img600.imageshack.us/img600/7364/tikj.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img46.imageshack.us/img46/5015/monticellodamngiantspil.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />SOURCES- <a href="http://en.wikipedia.org/wiki/Spillway" target="_blank">Wikipedia: Spillways</a>- <a href="http://en.wikipedia.org/wiki/Ladybower_Reservoir" target="_blank">Wikipedia: Ladybower Resevoir</a>- <a href="http://http//en.wikipedia.org/wiki/Monticello_Dam" target="_blank">Wikipedia: Monticello Dam</a> <img src="http://img200.imageshack.us/img200/126/largeholeinthewater.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img15.imageshack.us/img15/3267/bellmouthspillway.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img6.imageshack.us/img6/6733/largebellmouthspillwaym.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img19.imageshack.us/img19/9064/plugholegiantdraininwat.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img816.imageshack.us/img816/3342/ladybowerplughole.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img832.imageshack.us/img832/7937/wateroutletladybowerres.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img822.imageshack.us/img822/3161/morninggloryholeinthewa.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://img816.imageshack.us/img816/3204/bigholeinthewater.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />+REP</blockquote>

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