Navy Columbia (SSBN-826) Class Ballistic Missile Submarine Program: Background and Issues for Congress [Updated April 27, 2022] [open pdf - 2MB]
From the Introduction: "This report provides background information and potential oversight issues for Congress on the Navy's Columbia (SSBN-826) class program, a program to design and build a class of 12 new ballistic missile submarines (SSBNs) to replace the Navy's current force of 14 aging Ohio-class SSBNs. Since 2013, the Navy has consistently identified the Columbia-class program as the Navy's top priority program. The Navy procured the first Columbia-class boat in FY2021 and wants to procure the second boat in the class in FY2024. The Navy's proposed FY2023 budget requests $5,857.8 million (i.e., about $5.9 billion) in procurement and advance procurement (AP) funding for the program."
CRS Report for Congress, R41129
Congressional Research Service: https://crsreports.congress.gov/