Wet Weather Pump Station

The Clean Water Plan proposed to substantially increase the capacity of the existing ALCOSAN treatment plant to receive more flow during wet weather. This includes a plant expansion to and build-out. To attain increased peak flows and to regulate flow for the new Regional Tunnel system, a new Wet Weather Pump Station (WWPS) will need to be constructed. Operating in conjunction with the existing Main Pump Station, the new WWPS will allow the plant to achieve the combined peak capacity of 600 MGD during wet weather events. As a subconsultant to Brown & Caldwell, Sci-Tek is providing the following surveying services:

• Establish horizontal & vertical control points referenced to the Alcosan “Plant” Horizontal and Vertical Datums.
• Submit a PA One Call Preliminary Design notification to request information from participating utility companies on the existing underground utilities.
• Perform a topographic survey of the existing site conditions. The survey will include observed existing improvements, such as buildings, curbs, shoulders, ramps, sidewalks, islands, pavement, curb inlets, signs, traffic signals, manholes, storm drain inlets, hydrants, valves, vaults, poles, and other visible above ground utility appurtenances.
• Perform a survey of the marks & potholes designating the location of underground utilities (Quality Level B & A).
• Review existing utility drawings provided by ALCOSAN and incorporate into the survey base drawing.
• Provide four horizontal and vertical benchmarks in areas outside of the proposed construction limits to be utilized during construction of the WWPS along the proposed survey baseline.
• Prepare an existing conditions survey base drawing showing the features surveyed as well as information received as a result of the PA One Call notification.
• Survey the Upper Ohio Interceptor entering the Main Pump Station Building approximately 100’ below the ground surface.