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	<id>https://energyeducation.ca/wiki/index.php?action=history&amp;feed=atom&amp;title=Pondage</id>
	<title>Pondage - Revision history</title>
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	<updated>2026-04-05T23:14:37Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=10394&amp;oldid=prev</id>
		<title>Jmdonev: 1 revision imported</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=10394&amp;oldid=prev"/>
		<updated>2021-10-15T19:13:36Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported&lt;/p&gt;
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:13, 15 October 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Jmdonev</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=10393&amp;oldid=prev</id>
		<title>energy&gt;Jmdonev at 23:30, 26 May 2021</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=10393&amp;oldid=prev"/>
		<updated>2021-05-26T23:30:18Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:30, 26 May 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Done &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2016&lt;/del&gt;-01-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;15&lt;/del&gt;]]  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Done &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2021&lt;/ins&gt;-01-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;31&lt;/ins&gt;]]  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[File:Chief_Joseph_Dam.jpg|360px|thumb|right|Figure 1. Pondage is the small amount of water storage present in some run-of-the-river systems, such as the Chief Joseph dam above.&amp;lt;ref&amp;gt;Wikimedia Commons. (December 29, 2015). &amp;#039;&amp;#039;Chief Joseph Dam&amp;#039;&amp;#039; [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/6/6c/Chief_Joseph_Dam.jpg&amp;lt;/ref&amp;gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[File:Chief_Joseph_Dam.jpg|360px|thumb|right|Figure 1. Pondage is the small amount of water storage present in some run-of-the-river systems, such as the Chief Joseph dam above.&amp;lt;ref&amp;gt;Wikimedia Commons. (December 29, 2015). &amp;#039;&amp;#039;Chief Joseph Dam&amp;#039;&amp;#039; [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/6/6c/Chief_Joseph_Dam.jpg&amp;lt;/ref&amp;gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;onlyinclude&amp;gt;&#039;&#039;&#039;Pondage&#039;&#039;&#039; is the water that can &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;back-&lt;/del&gt;up behind larger [[run-of-the-river systems]]. This &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;pondage &lt;/del&gt;is &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;essentially &lt;/del&gt;a small amount of [[water storage]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;wherein &lt;/del&gt;[[water]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;is built up &lt;/del&gt;during &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;off&lt;/del&gt;-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;peak &lt;/del&gt;periods and used during peak periods.&amp;lt;/onlyinclude&amp;gt; In periods of low electricity demand, or when the plant is inactive the water that would otherwise fall through the [[spillway]]s and be &quot;wasted&quot; is stored and used when it is needed. Water that is built up in this pondage can result in the elevation of the water varying between 1-1.5 [[meter]]s during operation.&amp;lt;ref&amp;gt;Foundation for Water and Energy Education. (December 29, 2015). &#039;&#039;Types of Hydroelectric Projects&#039;&#039; [Online]. Available: http://fwee.org/nw-hydro-tours/how-the-northwest-hydro-system-works/types-of-hydroelectric-projects/&amp;lt;/ref&amp;gt; A significant amount of pondage allows the plant to &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;accomodate &lt;/del&gt;hourly fluctuations.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;onlyinclude&amp;gt;&#039;&#039;&#039;Pondage&#039;&#039;&#039; is the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;term for &lt;/ins&gt;water that can &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;build &lt;/ins&gt;up behind larger [[run-of-the-river systems]]. This is a small amount of [[water storage]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;where &lt;/ins&gt;[[water]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;accumulates &lt;/ins&gt;during &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;low&lt;/ins&gt;-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;demand &lt;/ins&gt;periods and &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;is &lt;/ins&gt;used during peak periods &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;when demand is highest&lt;/ins&gt;.&amp;lt;/onlyinclude&amp;gt; In periods of low electricity demand, or when the plant is inactive the water that would otherwise fall through the [[spillway]]s and be &quot;wasted&quot; is stored and used when it is needed. Water that is built up in this pondage can result in the elevation of the water varying between 1-1.5 [[meter]]s during operation.&amp;lt;ref&amp;gt;Foundation for Water and Energy Education. (December 29, 2015). &#039;&#039;Types of Hydroelectric Projects&#039;&#039; [Online]. Available: http://fwee.org/nw-hydro-tours/how-the-northwest-hydro-system-works/types-of-hydroelectric-projects/&amp;lt;/ref&amp;gt; A significant amount of pondage allows the plant to &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;accommodate &lt;/ins&gt;hourly fluctuations &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;in energy demand&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Generally speaking, since &lt;/del&gt;small amounts of water storage in the form of pondage allow run-of-the-river systems to run fully even during off-peak periods, plants with pondage tend to be more efficient than those without.&amp;lt;ref&amp;gt;Electrical Engineering Tutorials. (December 29, 2015). &#039;&#039;Hydroelectric Plants&#039;&#039; [Online]. Available: http://www.powerelectricalblog.com/2007/04/hydro-electric-plants-classification.html&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Since &lt;/ins&gt;small amounts of water storage in the form of pondage allow run-of-the-river systems to run fully even during off-peak periods, plants with pondage tend to be more efficient than those without.&amp;lt;ref&amp;gt;Electrical Engineering Tutorials. (December 29, 2015). &#039;&#039;Hydroelectric Plants&#039;&#039; [Online]. Available: http://www.powerelectricalblog.com/2007/04/hydro-electric-plants-classification.html&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;==For Further Reading== &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;*[[Penstock]] &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;*[[Hydroelectric facility]] &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;*[[Hydroelectric dam]] &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;*[[Hydroelectricity]] &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;*Or explore a [[Special:Random|random page]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{reflist}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{reflist}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Ed edit&lt;/del&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Uploaded&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>energy&gt;Jmdonev</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=4045&amp;oldid=prev</id>
		<title>Jmdonev: 1 revision imported</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=4045&amp;oldid=prev"/>
		<updated>2016-02-18T04:31:15Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:31, 18 February 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Jmdonev</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=4044&amp;oldid=prev</id>
		<title>Jmdonev at 20:07, 31 December 2015</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pondage&amp;diff=4044&amp;oldid=prev"/>
		<updated>2015-12-31T20:07:51Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[Category:Done 2016-01-15]] &lt;br /&gt;
[[File:Chief_Joseph_Dam.jpg|360px|thumb|right|Figure 1. Pondage is the small amount of water storage present in some run-of-the-river systems, such as the Chief Joseph dam above.&amp;lt;ref&amp;gt;Wikimedia Commons. (December 29, 2015). &amp;#039;&amp;#039;Chief Joseph Dam&amp;#039;&amp;#039; [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/6/6c/Chief_Joseph_Dam.jpg&amp;lt;/ref&amp;gt;]]&lt;br /&gt;
&amp;lt;onlyinclude&amp;gt;&amp;#039;&amp;#039;&amp;#039;Pondage&amp;#039;&amp;#039;&amp;#039; is the water that can back-up behind larger [[run-of-the-river systems]]. This pondage is essentially a small amount of [[water storage]] wherein [[water]] is built up during off-peak periods and used during peak periods.&amp;lt;/onlyinclude&amp;gt; In periods of low electricity demand, or when the plant is inactive the water that would otherwise fall through the [[spillway]]s and be &amp;quot;wasted&amp;quot; is stored and used when it is needed. Water that is built up in this pondage can result in the elevation of the water varying between 1-1.5 [[meter]]s during operation.&amp;lt;ref&amp;gt;Foundation for Water and Energy Education. (December 29, 2015). &amp;#039;&amp;#039;Types of Hydroelectric Projects&amp;#039;&amp;#039; [Online]. Available: http://fwee.org/nw-hydro-tours/how-the-northwest-hydro-system-works/types-of-hydroelectric-projects/&amp;lt;/ref&amp;gt; A significant amount of pondage allows the plant to accomodate hourly fluctuations. &lt;br /&gt;
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Generally speaking, since small amounts of water storage in the form of pondage allow run-of-the-river systems to run fully even during off-peak periods, plants with pondage tend to be more efficient than those without.&amp;lt;ref&amp;gt;Electrical Engineering Tutorials. (December 29, 2015). &amp;#039;&amp;#039;Hydroelectric Plants&amp;#039;&amp;#039; [Online]. Available: http://www.powerelectricalblog.com/2007/04/hydro-electric-plants-classification.html&amp;lt;/ref&amp;gt;&lt;br /&gt;
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==References==&lt;br /&gt;
{{reflist}}&lt;br /&gt;
[[Category:Ed edit]]&lt;/div&gt;</summary>
		<author><name>Jmdonev</name></author>
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