Location: Pittsburgh, Pennsylvania

Services include:

• GIS-based sewer system mapping
• Sewer System Data collection 
• Data conversion
• Review of historical record drawings and plat maps
• System maintenance

Many of our nation’s major cities continue to operate combined sanitary sewer and stormwater systems. In order to reduce combined sewer overflows (CSO), the Pittsburgh Water and Sewer Authority (PWSA) developed a Long Term Control Plan (LTCP).  The LTCP is divided into two regions. 

As project lead for the LTCP for Region 2, the larger area containing the majority of the CSOs, Baker completed tasks including field inspection, data collection, global positioning system (GPS) information for 1,000 structures, and 20 miles of Closed-Circuit television recording. Baker also completed a review of historical data and materials, and developed GIS-based sewer system mapping for the PWSA, including the conversion of MicroStation-based plat mapping for more than 20,000 manholes and 8 million feet of pipe. Additionally, more than 200 flow monitors were installed in the region to collect system hydrology data, form a basis for model development, and support long-term system management.

This $7.5 million project included coordination with the regional sewage authority and the upstream communities. Final CSO control alternatives were also presented to the regulators, ratepayers, and other stakeholders in Allegheny County.