An Evaluation of the Troxler 3241-B Nuclear Asphalt Gauge, MLR-85-11, 1986

The Troxler 3241-B Asphalt Content Gauge is intended for rapidly determining the bitumen content of bituminous paving mixtures. A 300 Millicurie Americuium 241: Beryllium source emitts neutrons which are affected by the hydrogen in the mix. The affected neutrons are detected by Helium 3 detectors, counted and computed into a percentage bitumen of the asphalt mix. The current methods of determining the bitumen content of bituminous paving mixtures requires the use of potentially hazardous chemicals and several hours of testing time. When extracted aggregates are not needed, determination of the bitumen content of a paving mixture by the nuclear method may be easier, quicker and potentially safer. The objective of the project is to study the accuracy of the Troxler 3241-B Nuclear Asphalt Content Gauge in measuring the asphalt cement (AC) content of asphalt concrete mixtures produced with different asphalt cements and different aggregates.

The Wever Bypass excavations: Highway archaeology along the Great River Road in southeast Iowa.

This is a story about a highway project near the small town of Wever, Iowa, and an American Indian village that existed at the location prior to the Europeans' arrival. The culture that lived in this village existed in a 10 state region of the Upper Midwest and may have been the ancestors of tribes living in the Midwest when European explorers entered the region. An archaeological recovery of information from the site was undertaken by the Iowa Department of Transportation because four-lane construction of U.S. 61 could not be accomplished without destroying most of the site. This site proved to be one of the richest archaeological finds in the State of Iowa. ǂc Iowa Department of Transportation.

Audit report on the Great River Regional Waste Authority for the years ended June 30, 2005 and 2006

Audit report on the Great River Regional Waste Authority for the years ended June 30, 2005 and 2006.

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2007

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2007

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2009

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2009

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2010

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2010

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2011

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2011

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2012

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2012

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2013

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2013

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2014

Audit report on the Great River Regional Waste Authority for the year ended June 30, 2014