WING DAMS - Revision history

https://www.encyclopediadubuque.org/index.php?action=history&feed=atom&title=WING_DAMS WING DAMS - Revision history 2026-04-15T18:26:27Z Revision history for this page on the wiki MediaWiki 1.45.1 https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=170097&oldid=prev Randylyon at 18:19, 1 September 2021 2021-09-01T18:19:27Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:19, 1 September 2021</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>[[Image:visible dam.jpg|left|thumb|250px|Piles of rock mark a wing dam on the Mississippi River.]]WING DAMS. Wing dams are jetties of rock placed nearly perpendicular along river banks. Some are constructed to be visible at all times other than during floods. Other wing dams are submerged and usually are marked with buoys to avoid boating accidents. They are intended to stabilize <del style="font-weight: bold; text-decoration: none;">channels </del>and to keep water levels high in mid-river for barge traffic. Most of them were built in the 1930s and 1940s by the U.S. Army Corps of Engineers. During low water flow, the wing dams keep the channel deeper for barge traffic and increase water velocity in the center to create a stable, self-scouring channel. </div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>[[Image:visible dam.jpg|left|thumb|250px|Piles of rock mark a wing dam on the Mississippi River.]]WING DAMS. Wing dams are jetties of rock placed nearly perpendicular along river banks. Some are constructed to be visible at all times other than during floods. Other wing dams are submerged and usually are marked with buoys to avoid boating accidents. They are intended to stabilize <ins style="font-weight: bold; text-decoration: none;">the [[CHANNEL]] </ins>and to keep water levels high in mid-river for barge traffic. Most of them were built in the 1930s and 1940s by the U.S. Army Corps of Engineers. During low water flow, the wing dams keep the channel deeper for barge traffic and increase water velocity in the center to create a stable, self-scouring channel. </div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>Studies have indicated that wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td><td class="diff-marker"></td><td style="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;"><div>Studies have indicated that wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td></tr> <tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category: Channel]]</ins></div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14715&oldid=prev Randylyon at 03:22, 29 May 2009 2009-05-29T03:22:04Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:22, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7">Line 7:</td> <td colspan="2" class="diff-lineno">Line 7:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>(All photographs were courtesy of Maury Anderson.)</div></td><td class="diff-marker"></td><td style="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;"><div>(All photographs were courtesy of Maury Anderson.)</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>(Technical assistance on all photographs was provided by Rebekah Godwin.)</div></td><td class="diff-marker"></td><td style="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;"><div>(Technical assistance on all photographs was provided by Rebekah Godwin.)</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14714&oldid=prev Randylyon at 03:21, 29 May 2009 2009-05-29T03:21:47Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:21, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l6">Line 6:</td> <td colspan="2" class="diff-lineno">Line 6:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>(Technical assistance on all photographs provided by Rebekah Godwin)<del style="font-weight: bold; text-decoration: none;">.</del></div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">(All photographs were courtesy of Maury Anderson.)</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>(Technical assistance on all photographs <ins style="font-weight: bold; text-decoration: none;">was </ins>provided by Rebekah Godwin<ins style="font-weight: bold; text-decoration: none;">.</ins>)</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Category: Transportation]]</div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14713&oldid=prev Randylyon at 03:20, 29 May 2009 2009-05-29T03:20:13Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:20, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:visible dam.jpg|left|thumb|250px|Piles of rock mark a wing dam on the Mississippi River.]]WING DAMS. Wing dams are jetties of rock placed nearly perpendicular along river banks. Some are constructed to be visible at all times other than during floods. Other wing dams are submerged and usually are marked with buoys to avoid boating accidents. They are intended to stabilize channels and to keep water levels high in mid-river for barge traffic. Most of them were built in the 1930s and 1940s by the U.S. Army Corps of Engineers. During low water flow, the wing dams keep the channel deeper for barge traffic and increase water velocity in the center to create a stable, self-scouring channel. </div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:visible dam.jpg|left|thumb|250px|Piles of rock mark a wing dam on the Mississippi River.]]WING DAMS. Wing dams are jetties of rock placed nearly perpendicular along river banks. Some are constructed to be visible at all times other than during floods. Other wing dams are submerged and usually are marked with buoys to avoid boating accidents. They are intended to stabilize channels and to keep water levels high in mid-river for barge traffic. Most of them were built in the 1930s and 1940s by the U.S. Army Corps of Engineers. During low water flow, the wing dams keep the channel deeper for barge traffic and increase water velocity in the center to create a stable, self-scouring channel. </div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>Studies have <del style="font-weight: bold; text-decoration: none;">also </del>indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>Studies have indicated <ins style="font-weight: bold; text-decoration: none;">that </ins>wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14712&oldid=prev Randylyon at 03:18, 29 May 2009 2009-05-29T03:18:55Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:18, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l6">Line 6:</td> <td colspan="2" class="diff-lineno">Line 6:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">(Technical assistance on all photographs provided by Rebekah Godwin).</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category: Transportation]]</ins></div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14711&oldid=prev Randylyon at 03:15, 29 May 2009 2009-05-29T03:15:57Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:15, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Image:rock.jpg|right|thumb|250px|Tons of rock were needed.]]</ins></div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14709&oldid=prev Randylyon at 03:14, 29 May 2009 2009-05-29T03:14:19Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:14, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4">Line 4:</td> <td colspan="2" class="diff-lineno">Line 4:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:willows.jpg|right|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Image:mats.jpg|left|thumb|250px|Willows were woven together prior to submerging them.]]</ins></div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14707&oldid=prev Randylyon at 03:12, 29 May 2009 2009-05-29T03:12:50Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:12, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3">Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|250px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>[[Image:willows.jpg|<del style="font-weight: bold; text-decoration: none;">left</del>|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>[[Image:willows.jpg|<ins style="font-weight: bold; text-decoration: none;">right</ins>|thumb|250px|Piles of willows were needed to construct the dams.]]</div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14706&oldid=prev Randylyon at 03:12, 29 May 2009 2009-05-29T03:12:27Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:12, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l2">Line 2:</td> <td colspan="2" class="diff-lineno">Line 2:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|<del style="font-weight: bold; text-decoration: none;">150px</del>|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>[[Image:diagram.jpg|left|thumb|<ins style="font-weight: bold; text-decoration: none;">250px</ins>|This diagram illustrates the layers of willows and rock used to create the first wing <ins style="font-weight: bold; text-decoration: none;">dams.]]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Image:willows.jpg|left|thumb|250px|Piles of willows were needed to construct the </ins>dams.]]</div></td></tr> </table>

Randylyon https://www.encyclopediadubuque.org/index.php?title=WING_DAMS&diff=14704&oldid=prev Randylyon at 03:10, 29 May 2009 2009-05-29T03:10:37Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:10, 29 May 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l2">Line 2:</td> <td colspan="2" class="diff-lineno">Line 2:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td><td class="diff-marker"></td><td style="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;"><div>Studies have also indicated wing dams may cause problems. Under flood conditions, the structures slow water speed and constrict the channel forcing flood levels to rise. A comparison (Criss and Shock) of flood stage levels of the middle-[[MISSISSIPPI RIVER]] (from the confluence of the Missouri River down to the Ohio River), and the lower Missouri River, both heavily lined with wing dams, to the Meramec River in Missouri, and the Ohio River at Cincinnati which are free of wing dams suggested that wing dams increased flooding. "Where none of this kind of engineering occurred (including the construction of levees), the records today look just like the records of 100 years ago," said Criss. "Such is not the case on the heavily engineered Mississippi River at St. Louis. Before [[WORLD WAR II]], floods that reached 38 feet or higher at St. Louis were very rare, occurring only about every 50 years, but now flood stages of this magnitude occur every five years or so."</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Image:diagram.jpg|left|thumb|150px|This diagram illustrates the layers of willows and rock used to create the first wing dams.]]</ins></div></td></tr> </table>

Randylyon