Correspondence, reports, specifications, design notes, maps, plans, and other materials relating to the design, construction, and maintenance of bridges in the City of New Orleans. Also included are similar documents relating to the beautification of the Bayou St. John waterway and other "non-bridge" projects such as the Lake Pontchartrain bulkhead and the U.S. Immigration Station wharf.

In addition to documenting the operations of the City Engineer's office (and later the Department of Streets) relative to bridge projects, the records also provide detail on intergovernmental relationships on several levels: City-state; City-federal (relative to WPA and other federal work projects as well as to the U.S. Army Corps of Engineers); City-Sewerage and Water Board; City-Orleans Levee Board; and City-Jefferson Parish. The Bayou St. John Aquatic Park records include copies of correspondence of Walter Parker relative to his activities on behalf of the Bayou St. John Improvement Association. Among the correspondents represented in this segment of the records are Cordell Hull and Harry Hopkins.

Specific items of interest include a survey of boats operating in Bayou St. John [in Bayou St. John-Esplanade Bridge correspondence, 1934-1935] and a report on the status of the shipyards on Bayou St. John [in Bayou St. John-Esplanade Bridge-New bridge correspondence, 1930-1936].