The Fed. Bureau of Prisons (BOP) is responsible for the custody and care of more than 201,000 fed. offenders. To provide housing for these prisoners, BOP manages the construction and maintenance of its prison facilities and oversees contract facilities. This report looks into recent increases in estimated costs for Fed. Correctional Institution construction projects in Mendota, CA; Berlin, NH; and McDowell, WV, which have led to almost $278 million or 62% more being provided in funding than initially estimated. This report addresses: (1) the reasons for the changes to the estimated costs; and (2) the actions BOP has taken -- or plans to take -- to control future cost increases and delays. Includes recommendations. Charts and tables.