Consists primarily of handwritten engineering reports, monthly progress reports, time reports, cost estimates, and property acquisition documentation from the Commission's formative years. Contains detailed engineering reports from Samuel L. Smedley and other engineering staff documenting park construction activities, material costs, land surveys, and workforce management. The bulk of committee-specific documentation relates to the Committee on Land Purchases and Damages (1900-1931), including meeting minutes and correspondence regarding specific property acquisitions such as Hermit Lane, Gorgas Lane, Dobson Tract, and Indian Rock Hotel.