The two bound typescripts contain research regarding flooding in Los Angeles County that was prepared by J. W. Reagan, Consulting Engineer for the Corps of Engineers' Engineer Office and Chairman of the Committee of Menaced and Flooded Areas. The report contains statements of various California residents regarding their experience with floods in the Los Angeles area. Their narratives include damage caused by floods as well as work done to prevent flooding in their area including dams and river rerouting. The research chiefly covers floods caused by the Los Angeles River and the San Gabriel River from the 1770s to 1913. The report also includes precipitation data from 1849 to 1913 for parts of southern California.
