Develops methodology and enhances existing software to quantitatively assess the vulnerability of water supply intakes on rivers and lakes to discharges from tributaries, combined sewer overflows, and spills. Also provides a basis for identifying how potentially sensitive areas may be impacted by releases from point sources. Provides a case study for applications in other areas. The Foundation did not publish a final report. USGS documented the study in a Water Resources Investigation Report, Particle Tracking Analysis of the Susceptibility of Public Water Intakes to Contamination on the St. Clair-Detroit River Waterway. Tailored Collaboration partner: City of Detroit Water and Sewerage Dept. Published in 2004. Subscribers may order a pamphlet from the Foundation.