In performing this audit, we relied on electronic data files we obtained from the Authority's oversight firms related to the dollar amount and nature of changes to the Authority's construction contracts. The GAO, whose standards we are statutorily required to follow, requires us to assess the sufficiency and appropriateness of any computer-processed information we use to support our findings, conclusions, or recommendations. To perform this assessment, we evaluated the oversight firms' data against sources of corroborating documentation from both the Authority and its construction contractors. We determined that the data was sufficiently reliable for the purposes of summarizing change orders in this report.