Low water stream crossings in Iowa : a selection and design guide.

Details

• Creators:
  McDonald, Thomas ; Anderson-Wilk, Mark
• Corporate Creators:
  Iowa State University. Center for Transportation Research and Education
• Corporate Contributors:
  Iowa. Highway Research Board
• Subject/TRT Terms:
  • Streams
  • Fords (Hydrology)
  • Bridges
  • Bridge design
  • Bridge construction
  • Fords (Stream crossings)--Iowa--Design and construction
  • Bridges--Iowa--Design and construction
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Center for Transportation Research and Education
• Abstract:
  Most Iowa counties maintain low volume roads with at least one bridge or culvert that is structurally ; deficient or obsolete. In some counties the percentage of deficient drainage structures may be as ; high as 62%. Replacement with structures of similar size would require large capital expenditures ; that many counties cannot afford. Low water stream crossings (LWSCs) may be an acceptable lowcost ; alternative in some cases. ; LWSCs are particularly suitable for low volume roads across streams where the normal volume of ; flow is relatively low. There are three common types of LWSCs: ; 1. unvented fords ; 2. vented fords ; 3. low water bridges. ; LWSC sites, types, and designs should be carefully selected since low water stream crossings will be ; flooded periodically, requiring the road to be temporarily closed to traffic.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23862/dot_23862_DS1.pdf
• File Type:
  [PDF - 458.58 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f9121710bd5b32676e4cd1761e9225820c8f7aaa577c6fe1cdfd0712c69e49efbaf92b023991b3dd6d56a7d24de1935f90e645024200067d9ca332bfc25201a9