Bid of H.H. Peterson for Laying Concrete Pavement, Imperial County, California: Brawley to Holtville Route Folder 1 July 29, 1920

Budget: Imperial County Highways - New River Fill Folder 2 1920-21

Cost Sheet: Imperial County Highways - Calezico to El Centro Road Folder 3 n.d.

Imperial County Highways, Frink Rock Quarry Costs Folder 4 1920-21

Cost Sheets: Imperial County HIghways Folder 5 n.d.

Report of the Imperial County Highway Commission Folder 6 January 1, 1920-June 20, 1921

Report: Imperial County Highway Commission Folder 7 January 21, 1921

Imperial County Grand Jury Audit of Imperial County Highway Commission, Conducted by J.A. Wagner, CPA, El Centro Folder 8 September 9, 1922