A computerized method for the hydrologic design of culverts.

ERI project 999-SHR-164Nationwide, about five cents of each highway construction dollar isspent on culverts. In Iowa, average annual construction costs on theinterstate, primary, and federal-aid secondary systems are about$120,000,000. Assuming the national figure applies to Iowa, about$6,000,000 are spent on culvert construction annually. For each one percentreduction in overall culvert costs, annual construction costs wouldbe reduced by $60,000