Chapter Hazard Analysis

B


Scott Road, Welch Creek, July 20, 1996

Source: Chris Dagiantis,

Kane County Development Department
ridges: A key evacuation and safety concern is when roads and bridges go under water. Generally, the larger the road, the more likely it will not flood, but this is not always the case (witness the interstate high­way under water in the photo on page 2-9).

A review of the Flood Insurance Rate Map and accompanying flood profiles identified 58 bridges and culverts that will be underwater during a base flood. These are shown in Map 1-10 in Chapter 1. They are listed in Appendix D.

A bridge does not have to be under water to be damaged or to cut off an evacuation route. In some cases the bridge is high, but the access road may be flooded. In other cases, the bridge or culvert can be washed out. This is especially dangerous if a person drives on a flooded road and assumes that the bridge is still there.

In addition to the locations listed in Appendix D, there are bridges and culverts in areas that are not included in the Flood Insurance Rate Map study areas, such as those located along small tributary streams.

The following have been identified by the municipalities and township road commissions as obstructing or impeding the flow water during flood events:

• 
  Batavia: culverts along the Mill Creek Tributary
  
• 
  Batavia: bridges and culverts along Mahoney Creek and its tributaries
  
• 
  Big Rock Township: Granart Road at Big Rock Creek
  
• 
  Burlington Township: Middleton Road
  
• 
  Elgin: State Street bridge piers at the Fox River
  
• 
  Geneva Township: Wenmoth Road along Mill Creek
  
• 
  Lily Lake: State Route 64, east of State Route 47 along Ferson Creek
  
• 
  Montgomery: US 30 at Blackberry Creek (several structures)
  
• 
  Montgomery: Railroad structure downstream of U.S. Route 30 at Blackberry Creek
  
• 
  Plato Township: Rohrsen Road
  
• 
  Rutland Township: Kruetzer Road bridge
  
• 
  South Elgin: McDonald Road at Otter Creek
  
• 
  South Elgin: State Street at the Fox River
  
• 
  St. Charles: Prairie Street at the Fox River
  
• 
  St. Charles: State Route 64 at the Fox River
  
• 
  West Dundee: State Route 31 on Sleepy Creek