The collection consists of engineering field books containing surveys, diagrams and other information about the City of Niagara Falls, Ontario. Some books include other areas such as Niagara Falls (New York), Niagara-on-the-Lake, Fort Erie, Thorold, St. Davids, Chippawa, Bertie, St. Catharines, Welland, Humberstone, Tilsonburg, Orillia, and New Brunswick. The bulk of the collection contains surveys, diagrams and information relating to property surveys and sewers and sidewalks in Niagara Falls (Ontario), as well as hydroelectric power, both within and outside the Niagara area. The books were maintained by Civil Engineers of the City of Niagara Falls, including C.H. Mitchell and John H. Jackson, as well as Anderson & Barry (Surveyors & Engineers).