For inquiries about requests for bids and proposals for contractor and consultant services, call 412-350-5914. Resources. Click here for construction projects currently out to bid.Click here for Request for Proposal projects currently out for proposals. With these goals in mind, we are seeking Proposals to perform Contracted Services in the seven categories of areas described below. Provide a detailed discussion of your firm's approach to the successful completion of the scope of services outlined in this RFP. The Allegheny County Sewer Authority (ALCOSAN) is seeking proposals, through this. Applicants must complete and include all Exhibits for submission with the Proposal. The Exhibits for New Construction Projects are on the following pages. ACCA has issued a Request for Proposals for the redevelopment of 115 East Jefferson Street in Allegheny City Central. Deadline: Monday, September 10, 2018.