This report summarizes recommendations for improved Corps of Engineers construction contract management policies and procedures for the activities of modifications and claims processing, contractor submittals adminstration, and construction contract progress determination and reporting. The major product of this research was a proposed Engineer Pamphlet 415-1-2--Modifications and Claims Guide. Other recommendations proposed: (1) changes to certain modifications and claims requirements of the Engineer Contract Instructions (ER 1180-1-1), (2) a revised ER 415-1-10--Contractor Submittals; and (3) Guidance for standardized calculation of reported construction contract progress values. This report also summarizes the considerations and methodology involved in the development of these recommendations. (Author)