Minimizing Roadway Embankment Damage from Flooding (2016) / Chapter Skim
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14 CHAPTER THREE CASE EXAMPLES Quick action was taken to armor and protect the stretches of damaged road. FIGURE 13 Damage from Hurricane Dennis (2005)
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15 FIGURE 14 Typical armoring detail 1 for 1:3 slopes or flatter (Courtesy of Florida DOT)
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16 of the pile cap. Starting from the other face of the piles (seaward face)
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17 the state DOT is now preparing adequate repair measures. Gabions are proposed for this site.
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18 placed over the blocks. The system successfully withstood the 2011 flooding forces.
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19 FIGURE 27 Overtopping damage in 2009 flood (TH-9 south of Ada, Courtesy of Minnesota DOT)
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20 critical shear strength of the grass cover; otherwise, the cover will fail and the underlying soil will be progressively eroded. Pavement is the next least costly solution.
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21 verts under the roadways that drain mountainside runoff into the river and private access bridges (private culverts) that connect the highway to the properties on the other side of the river.
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22 mize damage, or whether in the event of flooding the culvert bridges will be considered sacrificial structures, to maintain roadway embankment stability. FIGURE 36 US-34 damage at MP 76.73 (Courtesy of Colorado DOT)
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23 FIGURE 39 US-36 damage at MP 8.00 (Courtesy of Colorado DOT)
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24 which required a project to stabilize the embankment running along the streamside. This project was funded by the state and by FHWA.
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25 FIGURE 44 Slope erosion and pavement undermining after Hurricane Isabel in 2003 (Courtesy of WVDOT)
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26 for this purpose. The underlying materials were mostly cobbles that were considered good filter material.
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