Population by Age Group and % of Total Population, 2007

Estimates/projections for age 60+ for the state and for its counties and incorporated places. DEA also provides population estimates on poverty, race and ethnicity, and urban and rural for age 60+. This statistical information is obtained from numerous resources, including the State Data Center of Iowa, US Census Bureau, the Administration on Aging, and Iowa State University Census Services. "The Census Bureau uses the latest available estimates as starting points for population projections. Sometimes the user may see both an estimate and a projection available for the same reference date, which may not agree because they were produced at different times. In such cases, estimates are the preferred data." (Source: State Data Center)

Determination of Flood Dischard Characteristics of Small Drainage Areas, HR-3, Progress Report, 1960

Project HR-3 of the Iowa Highway Research Board has been active since October 1, 1950. The project objective is the determination of flood discharge characteristics of small drainage areas. Funds for the project amount to $10,000 per year of which, by cooperative agreement, the Highway Commission and the U. S. Geological Survey each furnish $5,000. Previous reports have explained the set-up of the project and these explanations will not be repeated in this report.