https://epg.modot.org/index.php?title=231.7_Backslope_Grade&feed=atom&action=history231.7 Backslope Grade - Revision history2024-03-29T09:31:02ZRevision history for this page on the wikiMediaWiki 1.33.1https://epg.modot.org/index.php?title=231.7_Backslope_Grade&diff=19583&oldid=prevMastes: remove metric values2009-02-02T20:14:26Z<p>remove metric values</p>
<table class="diff diff-contentalign-left" 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: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 20:14, 2 February 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: #222; 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>===231.7.1.1 Rock Cuts===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>===231.7.1.1 Rock Cuts===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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>The maximum backslope allowed is included in the preliminary geotechnical report. Rock bench details are included in the preliminary geotechnical report and are typically set at 30 ft. <del class="diffchange diffchange-inline">(9.0 m) </del>vertical with 15 ft. <del class="diffchange diffchange-inline">(4.5 m) </del>horizontal benches. When good quality rock is present, it is recommended a 1:1 backslope be used from the back of the ditch to establish the theoretical slope limit. This slope limit can then be utilized to determine the location of the R/W line. If there is a significant amount of soil above the rock, then the soil cut slope recommended in the preliminary geotechnical report must be used to establish the theoretical slope limit.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>The maximum backslope allowed is included in the preliminary geotechnical report. Rock bench details are included in the preliminary geotechnical report and are typically set at 30 ft. <ins class="diffchange diffchange-inline"> </ins>vertical with 15 ft. horizontal benches. When good quality rock is present, it is recommended a 1:1 backslope be used from the back of the ditch to establish the theoretical slope limit. This slope limit can then be utilized to determine the location of the R/W line. If there is a significant amount of soil above the rock, then the soil cut slope recommended in the preliminary geotechnical report must be used to establish the theoretical slope limit.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>===231.7.1.2 Special Conditions===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>===231.7.1.2 Special Conditions===</div></td></tr>
</table>Masteshttps://epg.modot.org/index.php?title=231.7_Backslope_Grade&diff=18979&oldid=prevMastes: remove "Key Points" box2008-11-13T17:11:54Z<p>remove "Key Points" box</p>
<table class="diff diff-contentalign-left" 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: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 17:11, 13 November 2008</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="color: #222; 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><del style="font-weight: bold; text-decoration: none;">{|border="4" </del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;">|-style="background:yellow"</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;">|'''[[Key Points 231.7 Backslope Grade| Key Points]]'''</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;">|}</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; 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><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>==231.7.1 Introduction==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>==231.7.1 Introduction==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
</table>Masteshttps://epg.modot.org/index.php?title=231.7_Backslope_Grade&diff=17204&oldid=prevSmithk: article construction2008-02-29T14:50:00Z<p>article construction</p>
<p><b>New page</b></p><div>{|border="4" <br />
|-style="background:yellow"<br />
|'''[[Key Points 231.7 Backslope Grade| Key Points]]'''<br />
|}<br />
<br />
<br />
<br />
==231.7.1 Introduction==<br />
<br />
Consult the district geologist to obtain the preliminary geotechnical report sufficiently early in the [[:Category:138 Project Development Chronology|project development process]] so the slope ratios can be established in the preliminary plan phase. The slope ratio given in the preliminary geotechnical report is a maximum and is not to be exceeded. Also, refer to the guidance found in [[231.6 Roadside Ditches|Roadside Ditches]] since it also impacts the backslope.<br />
<br />
===231.7.1.1 Rock Cuts===<br />
<br />
The maximum backslope allowed is included in the preliminary geotechnical report. Rock bench details are included in the preliminary geotechnical report and are typically set at 30 ft. (9.0 m) vertical with 15 ft. (4.5 m) horizontal benches. When good quality rock is present, it is recommended a 1:1 backslope be used from the back of the ditch to establish the theoretical slope limit. This slope limit can then be utilized to determine the location of the R/W line. If there is a significant amount of soil above the rock, then the soil cut slope recommended in the preliminary geotechnical report must be used to establish the theoretical slope limit.<br />
<br />
===231.7.1.2 Special Conditions===<br />
<br />
Often the preliminary geotechnical report will reveal the presence of different materials or conditions such as shale, sandstone, pinnacle rock, etc. This may necessitate site-specific requirements for the backslope.<br />
<br />
[[category:231 Typical Section Elements for Roadways|231.07]]</div>Smithk