Iowa's People: a resource for extension educators, June 1989

Statistics about people and their families interest community planners, social scientists, Extension educators, and others because the family is the fundamental social institution in our society. The purpose of this publication is to bring together in one reference many statistics about people in Iowa counties that have been published separately elsewhere. Most of the data presented are limited to only one year. This cross-sectional view is similar to a photograph that shows only one point in time. At an earlier or later time it might appear differently. Although the statistics reported in the various tables and figures represent different years, the data presented were the most recent available at the time this publication was prepared.

Preliminary Report on the Installation of Stainless Steel Culvert Pipe in Mahaska County, Iowa, HR-2001, 1967

At the request of Mr. Arnold E. Levine, of the Levine Company, Centerville, Iowa, the Iowa State Highway Commission was asked to observe the partial fabrication of two stainless steel culvert pipes and later the Commission was asked if they would like to study their durability. These pipes were fabricated April 12, 1967 in Des Moines, Personnel of the Design and Materials Department were at the fabrication, but no Research people were present. The idea for the installation was conceived and a site selected after which the project was turned over to the Research Engineer. The stainless steel pipes presumably contained the new Allegheny Metal, MF-1, whose composition is shown in Appendix A. The primary aim of the stainless steel pipe is to reduce long term costs that are incurred through replacement and upkeep. The MF-1 has a theoretical life of infinity.

Rehabilitation of Concrete Pavements Utilizing Rubblization and Crack and Seat Methods (Phase II): Performance Evaluation of Rubblized Pavements in Iowa, TR-550, 2008

This Phase II follow-up study of IHRB Project TR-473 focused on the performance evaluation of rubblized pavements in Iowa. The primary objective of this study was to evaluate the structural condition of existing rubblized concrete pavements across Iowa through Falling Weight Deflectometer (FWD) tests, Dynamic Cone Penetrometer (DCP) tests, visual pavement distress surveys, etc. Through backcalculation of FWD deflection data using the Iowa State University's advanced layer moduli backcalculation program, the rubblized layer moduli were determined for various projects and compared with each other for correlating with the long-term pavement performance. The AASHTO structural layer coefficient for rubblized layer was also calculated using the rubblized layer moduli. To validate the mechanistic-empirical (M-E) hot mix asphalt (HMA) overlay thickness design procedure developed during the Phase I study, the actual HMA overlay thicknesses from the rubblization projects were compared with the predicted thicknesses obtained from the design software. The results of this study show that rubblization is a valid option to use in Iowa in the rehabilitation of portland cement concrete pavements provided the foundation is strong enough to support construction operations during the rubblization process. The M-E structural design methodology developed during Phase I can estimate the HMA overlay thickness reasonably well to achieve long-lasting performance of HMA pavements. The rehabilitation strategy is recommended for continued use in Iowa under those conditions conducive for rubblization.

Development of LRFD Procedures for Bridge Pile Foundations in Iowa, Volume I: An Electronic Database for PIle LOad Tests (PILOT), TR-573, 2011

For well over 100 years, the Working Stress Design (WSD) approach has been the traditional basis for geotechnical design with regard to settlements or failure conditions. However, considerable effort has been put forth over the past couple of decades in relation to the adoption of the Load and Resistance Factor Design (LRFD) approach into geotechnical design. With the goal of producing engineered designs with consistent levels of reliability, the Federal Highway Administration (FHWA) issued a policy memorandum on June 28, 2000, requiring all new bridges initiated after October 1, 2007, to be designed according to the LRFD approach. Likewise, regionally calibrated LRFD resistance factors were permitted by the American Association of State Highway and Transportation Officials (AASHTO) to improve the economy of bridge foundation elements. Thus, projects TR-573, TR-583 and TR-584 were undertaken by a research team at Iowa State University’s Bridge Engineering Center with the goal of developing resistance factors for pile design using available pile static load test data. To accomplish this goal, the available data were first analyzed for reliability and then placed in a newly designed relational database management system termed PIle LOad Tests (PILOT), to which this first volume of the final report for project TR-573 is dedicated. PILOT is an amalgamated, electronic source of information consisting of both static and dynamic data for pile load tests conducted in the State of Iowa. The database, which includes historical data on pile load tests dating back to 1966, is intended for use in the establishment of LRFD resistance factors for design and construction control of driven pile foundations in Iowa. Although a considerable amount of geotechnical and pile load test data is available in literature as well as in various State Department of Transportation files, PILOT is one of the first regional databases to be exclusively used in the development of LRFD resistance factors for the design and construction control of driven pile foundations. Currently providing an electronically organized assimilation of geotechnical and pile load test data for 274 piles of various types (e.g., steel H-shaped, timber, pipe, Monotube, and concrete), PILOT (http://srg.cce.iastate.edu/lrfd/) is on par with such familiar national databases used in the calibration of LRFD resistance factors for pile foundations as the FHWA’s Deep Foundation Load Test Database. By narrowing geographical boundaries while maintaining a high number of pile load tests, PILOT exemplifies a model for effective regional LRFD calibration procedures.

African-Americans in Iowa, 2015

To recall and celebrate the positive contributions to our nation made by people of African descent, American historian Carter G. Woodson established Black History Week beginning on Feb. 12, 1926. In 1976, as part of the nation’s bicentennial, the week was expanded into Black History Month.

Iowa ABC Connections, RB06-013, 2015

For several years the Iowa Department of Transportation (DOT), Iowa State University, the Federal Highway Administration, and several Iowa counties have been working to develop accelerated bridge construction (ABC) concepts, details, and processes. Throughout this development, much has been learned and has resulted in Iowa being viewed as a national leader in the area of ABC. However, at this time, the Office of Bridges and Structures does not have a complete set of working standards nor design examples to accompany ABC portions of the bridge design manual (now called the Load and Resistance Factor Design/LRFD Bridge Design Manual). During the fall of 2013, the Iowa DOT constructed a bridge on IA 92 in Cass County using an ABC technique known as slide-in bridge construction. During the design of the Cass County Bridge, several questions were raised about the performance of critical design and construction details: the pile-to-pile cap connection and the polytetrafluoroethylene (PTFE) coated bearing pads on which the bridge would slide. The timing of this specific need and the initiation of this project offered a unique opportunity to provide significant short- and long-term value to the Office of Bridges and Structures. Several full-scale laboratory tests, which included several variations of the pile-to-pile cap connection and bearing pad slides, were completed. These tests proved that the connection was capable of achieving the desired capacity and that the expected coefficient of friction of the bearing pads was reasonably low. Finally, a design tool was developed for the Office of Bridges and Structures to be used on future projects that might benefit from a precast pile cap.

Libraries of state welfare institutions, 1930.

State institutions, such as hospitals, penal and correctional institutions and training schools for children have had libraries starting in about 1905. In 1925 the supervisory librarian position became vacant and was not filled. This report states that Iowa is in danger of losing her reputation as a progressive library state.

Reference/information services in Iowa libraries : a tentative report, 1969.

This document contains statistics and reports about Iowa public libraries. It includes tables, graphs, maps and information about the use of public libraries, loans, holdings, data by region and population and much more. The information was compiled for a consultants meeting for the Iowa State Traveling Library.

African Americans in Iowa, 2007

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2009

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2010

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2011

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2012

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2013

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.

African Americans in Iowa, 2014

Produced by the State Data Center of Iowa for the Iowa Commission on the Status of African-Americans. It is an annual snapshot of the demographic profile of the African American population in Iowa.