In this Indeed Career Coachapproved article, you will learn how to write a compelling proposal letter and structure it properly. Response Form: The Word document that Proposers fill out to answer questions about the solicitation.The Allegheny County Sewer Authority (ALCOSAN) is seeking proposals, through this. Agreement: A contract negotiated between Allegheny County and the Successful Proposer to provide the Contract Services. BACKGROUND. Allegheny Land Trust (ALT) is requesting proposals for a Conceptual Master Plan for the 151-acre. Clearly state the purpose of the proposal in a way that aligns your goals with the project's objectives. Related: Guide to Thank You Notes. A complete Invitation for Bids (IFB) consists of the following documents: THE PROJECT MANUAL, dated. Surveying of relevant infrastructure and tunnel survey monuments in the project area.