Inventory of County Records : Appanoose County, 1978.

This is an inventory of public records from Appanoose County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study.

Inventory of County Records: Dubuque County, 1978.

This is an inventory of public records from Dubuque County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study

Inventory of County Records: Iowa County, 1978.

This is an inventory of public records from Iowa County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study.

Inventory of County Records : Ringgold County,1978.

This is an inventory of public records from Ringgold County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study.

Inventory of County Records : Franklin County,1978.

This is an inventory of public records from Franklin County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study.

Inventory of county records : Osceola County,1978.

This is an inventory of public records from Osceola County. The State Historical Society of Iowa received funding from the National Historical Publications and Records Commission along with 5 other Iowa counties for this two year study.

Final Report for Research Project HR-181, Macadam Base Shoulders, September 1981

Highway safety and pavement performance can be directly influenced by the type of shoulders that are constructed. Shoulder design alternatives have always been rather limited. Moreover, the use of some of the alternatives has always been restricted by funding limitations. This research project seeks to explore the use of modified macadam base construction for shoulders. This type of shoulder design could offer the designer another option when paved or stabilized shoulders are being considered. Macadam base construction has in the past been shown to be quite strong and free draining. Two macadam base shoulder designs were developed and constructed for this research project. A new roadway embankment and P.C.C. pavement were constructed on a section of US 6 east of Adel in Dallas County. The macadam base shoulders were constructed adjacent to the pavement as part of the project. The north shoulder was finished with a choke stone course and bituminous surface treatment and the south shoulder was finished with a two (2) inch layer of Type B Class I1 asphalt concrete. Macadam stone base shoulders can be built with relatively minor construction problems with comparable strength and less cost than asphalt treated base shoulders. The macadam stone base shoulders have performed well with very little maintenance necessary. The improved drainage substantially reduces deterioration of the pavement joints.

Three faces of Midwestern isolationism,1981.

The papers presented in this volume were delivered at a conference held on April 2, 1980, in Iowa City under the sponsorship of the Center for the Study of the Recent History of the United States, a cooperative undertaking involving the State Historical Society of Iowa, the Herbert Hoover Presidential Library, and the University of Iowa. The institutions were working together to make a larger contribution to the study of the history of the United States in the 20th century.

Fibrous P.C. Concrete Overlay Research Green County, Iowa, December 1978

The Greene County, Iowa overlay project, completed in October 1973, was inspected on October 16 & 17, 1978 After five years of service The 33 fibrous concrete sections, four CRCP sections, two mesh reinforced and two plain concrete sections with doweled reinforcement were rated relative to each other on a scale of 0 t o 100. The rating was conducted by the original members of the Project Planning Committee, Iowa DOT, Iowa Counties, Federal Highway Administration, University of Illinois and industry representatives . In all , there were 23 representatives who rated this project . The 23 values were then averaged to provide a final rating number for each section. The highest panel rating (90) was assigned to the 5-inch thick , deformed barre in forced PCC sections ; an 86t o a 3-inch thick , 160 lbs. of fiber and 600 lbs . of cement on a partial bonded surface ; an 84 to the 4-inch CRC with elastic joints (bonded) and an 84 to a 4-inch mesh reinforce section. One of the major factors influencing performance appears t o be the thickness. In the fibrous concrete overlay, The greatest influences appears t o be the fiber content. Overlay Sections containing 160 1b/yd3 of Fiber are, in almost all cases , outperforming those c o n t a i n i n g 60 or 100. It is obvious at This time meth at the 3-inch thick fibrous concrete overlays are, in general, out performing the 2-inch thick sections. The performance of the fibrous concrete the overlay appears to be favorably influenced by: (1) The use of higher a spectra fiber (0.025 x 2.5 i n c h e s ) v e r s u s (0.010 x 0.022 x 1.0 inches) (2) The use of a lower cement c o n t e n t ( 600 versus 750 1b/yd3) However, The set less well defined and the improvements in overlay performance attributed to high aspect ratio fibers and low cement contents.

Engineering Study Iowa Highway Resarch Board Project HR-223 Maintaining Granular Surfaced Roads, February 1981

Approximately 65% of Iowa's roads are surfaced with aggregates composed of crushed limestone and/or gravel. Rural Iowan's regard these roads as a very important part of their lives. Therefore, the slide-tape presentation, "Maintaining Granular Surfaced Roads" was developed to aid the motor grader operator to better understand the procedures required t o maintain aggregate surfaced roads. A typical cross-section is presented with the proper nomenclature assigned to the roadway features to facilitate the operator's understanding of the basic terms used the program. The following areas are expanded: safety , dragging, cutting, intersections , superelevations, and reporting any discrepancies. The operator's attention to detail can enhance the economy of the state and contribute to the savings of lives on rural highways.

National register of historic places in Iowa,1978.

This is a list of properties in Iowa in 1978 that are on the National Register of Historic Places. These properties are recognized as being historically, architecturally and archaeologically significant through a program of registration, financial aid and incentive, and partial protection from damage or destruction by federally-funded projects.

Histories of the Counties of Iowa, 1978.

Contains biographical histories of many of the counties of Iowa.

General highway and transportation map,1978.

Contains a highway map of each county in Iowa

Effects of urban development on the flood-flow characteristics of the Walnut Creek Basin, Des Moines Metropolitan area, Iowa,1978.

This report deals with the probable impact of urban development on the magnitude and frequency of flooding in the lower reach of the Walnut Creek Basin.

Bouguer gravity anomaly map of Iowa,1981.

Gravity values on this map are based on 1967 International Gravity Formula and are reduced to sea level with a Bouguer Density of 2.67 g/cm3.