Johnstown Local Flood Protection Project. Built (1938-1943) and maintained by the U.S. Army Corps of Engineers (Pittsburgh District), the JLFPP reflects the 1930s move toward a major federal role in local flood protection. This concrete-paved channel project, extending 9.2 miles along Johnstown's three rivers, became the nation's second largest flood control of its type. In its first 50 years, the only flooding here in 1977, during the modern flood of record.