Transit books, level books, and peg books of levels compiled by city engineers during surveys of the Skagit River Railway. Also includes survey books of east side transmission lines of the Skagit River Power Project. Books contain surveyors notes and drawings. F.F. Nicholas was project engineer. Volume Five of the Level Books includes cover title "Precise Levels Diablo to Rip Raps."

Specifications and bid documents for public works projects in Seattle or on City owned land. Often includes plans and contracts. Includes materials on Skagit River Power Project, Cedar River Watershed, Woodland and Jefferson Parks, Seattle Center facilities, Seattle Public Library, Tolt River Watershed, selected City office buildings, Model City projects, and other City sites. Records have been sampled.