Low Water Stream Crossing: Design and Construction Recommendations; A Selection and Design Guide; TR-453, February 2003

(2003) Low Water Stream Crossing: Design and Construction Recommendations; A Selection and Design Guide; TR-453, February 2003. Transportation, Department of

Preview

PDF tr453lwsc_guide.pdf File Size:469kB

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.