View Public Works' open solicitations, and learn more about how to register as a supplier and submit a bid or proposal. Construction contractors interested in performing construction contracts with the department must first complete the Vendor Registration process.A permit application should be submitted in the planning phases of your food business and before any purchasing, construction, or remodel activities begin. Major operational departments include Asset and Site Management, Facility Services,. Preliminary design is currently underway. It includes detailed engineering and environmental studies of the preferred alternative to minimize impacts. The Allegheny County Sewer Authority (ALCOSAN) is seeking proposals, through this.