AS-BUILT-432A_S1-0.dgn

I cannot provide a meaningful summary of this file. The file "AS-BUILT-432A_S1-0.dgn" is a MicroStation design file (indicated by the .dgn extension), which is a binary format used for technical drawings and CAD models. This file type contains geometric and design data that cannot be read or interpreted as text-based contract documentation.

To provide the summary you've requested, I would need access to contract-related documents such as Requests for Proposals (RFPs), Scopes of Work, Project Descriptions, addenda, or other written specifications that contain the contractual and procurement information you're seeking.