Iowa System of Bridge Deck Rehabilitation with Cathodic Protection, HR-1044, 1986

Bridge deck and substructure deterioration due to the corrosive effects of deicing chemicals on reinforcing steel is a problem facing many transportation agencies. The main concern is protection of older bridges with uncoated reinforcing steel. Many different methods have been tried over the past years to repair bridge decks. The Iowa system of bridge deck rehabilitation has proven to be very effective. It consists of scarifying the deck surface, removing any deteriorated concrete, and overlaying with low slump dense concrete. Another rehabilitation method that has emerged is cathodic protection. It has been used for many years in the protection of underground pipelines and in 1973 was first installed on a bridge deck. Cathodic protection works by applying an external source of direct current to the embedded reinforcing steel, thereby changing the electrochemical process of corrosion. The corroding steel, which is anodic, is protected by changing it to a cathodic state. The technology involved in cathodic protection as applied to bridge decks has improved over the last 12 years. One company marketing new technology in cathodic protection systems is Raychem Corporation of Menlo Park, California. Their system utilizes a Ferex anode mesh that distributes the impressed direct current over the deck surface. Ferex mesh was selected because it seemed readily adaptable to the Iowa system of bridge deck rehabilitation. The bridge deck would be scarified, deteriorated concrete removed, Ferex anode mesh installed, and overlaid with low slump dense concrete. The Federal Highway Administration (FHWA) promotes cathodic protection under Demonstration Project No. 34, "Cathodic Protection for Reinforced Concrete Bridge Decks."

Superpave Mix Designs for Low-Volume Roads, TR-414, Final Report, 2004

Most research current to the time of these projects was focused on use of Superpave mix designs on higher volume roads. Low volume roads have different requirements in terms of mix design, aggregate types, aggregate sources and project budgets. The purpose of this research was to determine if the Superpave mix design strategy for low volume roads was practical and economical. Eight projects were selected in five counties. The projects were completed in the summer of 1998. Performance evaluation of the resulting pavements was carried out annually. There was no significant increase in costs related to the use of Superpave. Nor were there any significant construction issues. There were some differences noted in placement and compaction in the field, but these were not serious.

Agreed–upon procedures report on the Iowa Turkey Marketing Council for the period January 1, 2013 through December 31, 2014

Agreed–upon procedures report on the Iowa Turkey Marketing Council for the period January 1, 2013 through December 31, 2014

Agreed-upon procedures report on Eden Township in Fayette County, Iowa for the period July 1, 2003 through April 30, 2015

Agreed-upon procedures report on Eden Township in Fayette County, Iowa for the period July 1, 2003 through April 30, 2015

2015 Corridor Management Plan - The Iowa Great River Road, 2015

The 2015 Corridor Management Plan for the Iowa Great River Road is modeled after similar plans for other National Scenic Byways: it is a dynamic, written document that describes the broad range of goals, objectives, policies, programs, projects and activities which can assist with protecting the intrinsic resources of a byway; interpreting the engaging stories of the byway; and promoting and presenting the byway with services and amenities to meet the needs and expectations of the traveling public.

Audit report on the Iowa Innovation Corporation for the years ended June 30, 2014 and 2013

Audit report on the Iowa Innovation Corporation for the years ended June 30, 2014 and 2013

Iowa Racing & Gaming Commission, 2010 Annual Report

2009 Annual Report on behalf of the Iowa Racing and Gaming Commission (the Commission). The Commission is committed to maintaining a vibrant gaming industry that provides economic growth and development for the State of Iowa while continuing to promote responsible gaming and ensuring continued participation in the "Buy Iowa First" program. Although revenues at the casinos slipped during the year reflecting the general downturn in the economy, the gaming industry once again contributed over $1 billion to the state's economy, including over $300 million in gaming taxes.

Asset Management Program Enhancement Plan: Baseline Assessment Phases I and II, 2015

This project resulted in the development of a framework for making asset management decisions on low-volume bridges. The research focused on low-volume bridges located in the agricultural counties of Iowa because recent research has shown that these counties have the greatest percentage of structurally deficient bridges in the nation. Many of the same counties also have the highest crop yields in the state, creating a situation where detours caused by deficient bridges on farm-to-market roads increase the cost to transport the crops. Thus, the research proposed the use of social return on investment (SROI), a tool used by international institutions such as the World Bank, as an asset management metric to gauge to the socioeconomic impact of structurally deficient bridges on the state in an effort to provide quantified justification to fund improvements on low-volume assets such as these rural bridges. The study found that combining SROI with current asset management metrics like average daily traffic (ADT) made it possible to prioritize the bridges in such a way that the limited resources available are allocated in a manner that promotes a more equitable distribution and that directly benefits the user, in this case Iowa farmers. The result is a system that more closely aligns itself with the spirit of MAP-21, in that infrastructure investments are used to facilitate economic growth for Iowa’s agricultural economy.

Statewide Transportation Improvement Program 2016-2019: Sorted by MPO and RPA, 2015

Iowa’s Statewide Transportation Improvement Program (STIP) has been developed in conformance with the guidelines prescribed by 23 U.S.C. and 49 U.S.C. The STIP is generated to provide the Federal Highway Administration and Federal Transit Administration a listing of all projects that are candidates for federal aid from the FHWA and FTA for the four federal fiscal years (FFY) 2016-2019. The 2016-2019 STIP was approved by FHWA and FTA on September 29, 2015. Preceding the listings of federal-aid candidates are general comments concerning Iowa’s public participation process for selection of federal-aid projects and the basis for funding the proposed projects. Documents evidencing the Iowa Department of Transportation’s authority to act concerning matters related to transportation, federal-aid expenditures, and approvals of metropolitan planning organizations’ (MPOs) transportation improvements programs (TIPs) have been provided in past STIPs and can be provided again upon request.

Audit report on the Muscatine Agricultural Learning Center for the year ended December 31, 2014

Audit report on the Muscatine Agricultural Learning Center for the year ended December 31, 2014